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Spore tube Stock Photos and Images
![. Fossil plants : for students of botany and geology . Paleobotany. VIl] PATHOLOGY OF FOSSIL TISSUES. 215 described by Etheridge^ from a Permo-Carboniferous coral. This observer records the occurrence of tubular cavities in the calices of Stenopora crinita Lonsd., and attributes their origin to a fungus which he names Palaeoperone endophytica; he mentions one case in which a tube contains fine spherical spore-like bodies which he compares with the spores of a Saprolegnia. As pointed out above (p. 128), it is almost impossible to decide how far these tubes in shells and corals should be attribu Stock Photo](https://c8.alamy.com/comp/RDBCKM/fossil-plants-for-students-of-botany-and-geology-paleobotany-vil-pathology-of-fossil-tissues-215-described-by-etheridge-from-a-permo-carboniferous-coral-this-observer-records-the-occurrence-of-tubular-cavities-in-the-calices-of-stenopora-crinita-lonsd-and-attributes-their-origin-to-a-fungus-which-he-names-palaeoperone-endophytica-he-mentions-one-case-in-which-a-tube-contains-fine-spherical-spore-like-bodies-which-he-compares-with-the-spores-of-a-saprolegnia-as-pointed-out-above-p-128-it-is-almost-impossible-to-decide-how-far-these-tubes-in-shells-and-corals-should-be-attribu-RDBCKM.jpg ". Fossil plants : for students of botany and geology . Paleobotany. VIl] PATHOLOGY OF FOSSIL TISSUES. 215 described by Etheridge^ from a Permo-Carboniferous coral. This observer records the occurrence of tubular cavities in the calices of Stenopora crinita Lonsd., and attributes their origin to a fungus which he names Palaeoperone endophytica; he mentions one case in which a tube contains fine spherical spore-like bodies which he compares with the spores of a Saprolegnia. As pointed out above (p. 128), it is almost impossible to decide how far these tubes in shells and corals should be attribu Stock Photo")
RMRDBCKM–. Fossil plants : for students of botany and geology . Paleobotany. VIl] PATHOLOGY OF FOSSIL TISSUES. 215 described by Etheridge^ from a Permo-Carboniferous coral. This observer records the occurrence of tubular cavities in the calices of Stenopora crinita Lonsd., and attributes their origin to a fungus which he names Palaeoperone endophytica; he mentions one case in which a tube contains fine spherical spore-like bodies which he compares with the spores of a Saprolegnia. As pointed out above (p. 128), it is almost impossible to decide how far these tubes in shells and corals should be attribu
RMRE1J05–. A monograph of the British Uredineae and Ustilagineae, with an account of their biology including the methods of observing the germination of their spores and of their experimental culture. Smut fungi; Rust fungi; Smut diseases; Fungi. Spore^Culture. 11 must be sterilized by heat; and after the nahrlosung has been introduced, the two ends of the tube are closed by cotton wool; this allows free access of air, but filters out any germs that may be floating in it. Or the culture may be made in a hanging-drop cell made of lead tubing, in the sides of which two holes have been cut (Fig. 13). I ha
RMRD7H9J–. Bacteriology and mycology of foods. Food. 18 BACTERIOLOGICAL APPARATUS placed on its support, introduce the NaOH by means of a pipette into the bottom of the tube and seal the tube immediately with a rubber stopper. Wright's Method, This is another absorption method and is different from the others only in method of procedure. It is especially adaptable to the isolation of anaerobic spore-forming bacteria. Decimal dilutions of the sample are introduced into sterile litmus milk. About 1 in. above the meniscus of the milk a tight cotton cylinder is forced upon which are put about 2 gms. of pyr
RMRE2J2F–. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. CRYPTOGAMS 327. Fig. 466. — Spore print of a gilled mushroom. of this expanded fruiting membrane that the class of mush- rooms we are considering gets its botanical name, Hymeno- mycetes, membrane fungi. The hymenium is not always borne on gills, but is arranged in various ways which serve as a convenient basis for distinguishing the different orders. In the tube fungi, to which the edible boletus belongs (Figs. 464, 465), the basidia are placed along the inside of little
RMRDWR1J–. Elements of botany. Botany; Botany. FERTILIZATION. 159 future plant is to spring. This kind of union is found to occur in many flowerless plants (Chapter XXIII), resulting in the production of a spore very unlike a seed in most re- spects, but capable of growing into a complete plant like that which produced it. 195. Number of Pollen Grains to each Ovule.— Only one pollen tube is necessary to fertilize each ovule, but so many pollen- grains are lost that plants produce many more of them than of ovules. The ratio, however, varies greatly. In the night- blooming cereus there are about 250,000
RMRDE1F7–. Diseases of bees. Bees. Apr. 12,1924 Development of American Foulbrood 139 added to each tube and it is then slanted. Series of agar slants varying in sugar concentration are inoculated with either vegetative cultures or diseased material containing only spores. To determine spore germination an approximately uniform amount, about one 2-mm. loopful of ropy material, when available, is used for inoculation of slants, otherwise a scale softened as described above. If no visible growth takes place after 48 hours' incubation, stained smears are made, to determine whether any germination has occu
RMRFWBBX–. Carnegie Institution of Washington publication. GYMNOSPERMS. '59 During the final stages in the development of the spermatozoid the proximal end of the pollen tube, which is still capped by the exine of the spore, grows downward into the prothallial cavity as in Zamia (Fig. 65, A). This cavity in Cycas, according to Ikeno, is filled with a watery fluid derived largely from the archegonia, and in which the spermatozoids swim on escaping from the pollen tube. Webber is of the opinion that in Zamia this fluid is derived largely from the pollen tube. The spermatozoids in Cycas, on escaping from
![. The elements of structural botany [microform] : with special reference to the study of Canadian plants : to which is added a selection of examination papers. Plant anatomy; Botany; Botanique; Botanique. 342. We shall now consider the mode of reproduction in the Mosses. Let us commence with the spore. This, upon meeting with proper conditions, bursts its outer coat (tlie pxospon'), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, iu most cases, a tangled thread-like uimss of vege- tation is produced, to w Stock Photo](https://c8.alamy.com/comp/RJ0XER/the-elements-of-structural-botany-microform-with-special-reference-to-the-study-of-canadian-plants-to-which-is-added-a-selection-of-examination-papers-plant-anatomy-botany-botanique-botanique-342-we-shall-now-consider-the-mode-of-reproduction-in-the-mosses-let-us-commence-with-the-spore-this-upon-meeting-with-proper-conditions-bursts-its-outer-coat-tlie-pxospon-and-the-inner-coat-the-endospore-is-then-pro-truded-as-a-slender-tube-this-continues-to-grow-by-repeated-divi-sion-until-at-length-iu-most-cases-a-tangled-thread-like-uimss-of-vege-tation-is-produced-to-w-RJ0XER.jpg ". The elements of structural botany [microform] : with special reference to the study of Canadian plants : to which is added a selection of examination papers. Plant anatomy; Botany; Botanique; Botanique. 342. We shall now consider the mode of reproduction in the Mosses. Let us commence with the spore. This, upon meeting with proper conditions, bursts its outer coat (tlie pxospon'), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, iu most cases, a tangled thread-like uimss of vege- tation is produced, to w Stock Photo")
RMRJ0XER–. The elements of structural botany [microform] : with special reference to the study of Canadian plants : to which is added a selection of examination papers. Plant anatomy; Botany; Botanique; Botanique. 342. We shall now consider the mode of reproduction in the Mosses. Let us commence with the spore. This, upon meeting with proper conditions, bursts its outer coat (tlie pxospon'), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, iu most cases, a tangled thread-like uimss of vege- tation is produced, to w
RMRE1F1G–. The elements of structural botany with special reference to the study of Canadian plants ... Plant physiology; Plant anatomy. 102 ELEMENTS OP STRUCTURAL BOTANY. 342. We shall now consider the mode of reproduction in the Mosses. Let us commence with the spore. This, upon meeting with proper conditions, bursts its outer coat (the exospore), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thread-like mass of vege- tation is produced, to which the name protonema has been given. Afte
RMRDD27Y–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. Fig.6- adJaAbPodosphaeraCasla£^ei, Lev. «epidennalceUsof^'?to»yiyr««.^A'a^«MOT; abranchedmycelialhypha is creeping over tlie surface and tias sent a liaustorium into one of ttie cells (surface view). ^ vertical section through epidermal cells with mycelial hypha and a haustorium which has penetrated into a cell, c a spore (gonidium) of Erysiphe VmbeUiferarum putting forth germ-tuijes on the epidermis of Anthrisctis sylvtstris. The smaller gemi.tube on the right is sen
RMRDFE2X–. Manual of tree diseases . Trees. 146 MANUAL OF TREE DISEASES of spore (the ascospores). These spores are confined in small delicate sacs, eight spores in each sac or ascus. During rainy periods, these sacs swell and a certain number are forced up through a tube leading from each cavity to the black mouths at the tips of the papillae. Once out- side, the sacs burst and the eight spores in each are shot into the air where they are carried away by the wind to great distances. It is these wind-blown ascospores which account for the extreme rapidity of spread of this fungus and make certain the i
![. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 192 ELEMENTS OP STRUCTURAL BOTANY.. Fig. 240. 342. We shall now consider the mode of reproduction in the Mosses. Let us commence with the spore. This, upon meeting with proper conditions, bursts its outer coat (the exospore), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thread-li Stock Photo](https://c8.alamy.com/comp/RJ2H37/the-elements-of-structural-botany-microform-with-special-reference-to-the-study-of-canadian-plants-to-which-is-added-a-selection-of-examination-papers-plant-anatomy-botany-plantes-botanique-192-elements-op-structural-botany-fig-240-342-we-shall-now-consider-the-mode-of-reproduction-in-the-mosses-let-us-commence-with-the-spore-this-upon-meeting-with-proper-conditions-bursts-its-outer-coat-the-exospore-and-the-inner-coat-the-endospore-is-then-pro-truded-as-a-slender-tube-this-continues-to-grow-by-repeated-divi-sion-until-at-length-in-most-cases-a-tangled-thread-li-RJ2H37.jpg ". The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 192 ELEMENTS OP STRUCTURAL BOTANY.. Fig. 240. 342. We shall now consider the mode of reproduction in the Mosses. Let us commence with the spore. This, upon meeting with proper conditions, bursts its outer coat (the exospore), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thread-li Stock Photo")
RMRJ2H37–. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 192 ELEMENTS OP STRUCTURAL BOTANY.. Fig. 240. 342. We shall now consider the mode of reproduction in the Mosses. Let us commence with the spore. This, upon meeting with proper conditions, bursts its outer coat (the exospore), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thread-li
RMRM7D2X–. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Rural School Leaflet 921. A germinating swarm spore showing germ tube entering leaf enough of the leaf surface to allow the passage of the germ tube within. It makes its way between the leaf cells where it branches in several direc- tions, forming the mycelium. Other enzymes are secreted that kill the protoplasm of the leaf cells, and the nutritive
RMREFC9W–. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. ' '4 DIVISION I.—GENERAL MORPHOLOGY. In compound spores each merispore germinates in the same way as a simple spore or has the power of doing so (see Fig. 59 C). It is not uncommon to see a germ-tube proceeding from almost every merispore, even where they are many in number, as in Pleospora herbarum and Cucurbitaria Labium. Sometimes certain merispores only germinate as a rule, and if the cells are arranged in a simple row his is usually the case with one or both the terminal
RMRDGWCR–. Elements of botany. Botany; Botany. FERTILIZATION. 159 future plant is to spring. This kind of union is found to occur in many flowerless plants (Chapter XXIII), resulting in the production of a spore very unlike a seed in most re- ^speets, but capable of growing into a complete plant like that which produced it. 195. Number of Pollen Grains to each Ovule. — Only one pollen tube is necessary to fertilize each ovule, but so many pollen- grains are lost that plants produce many more of them than of ovules. The ratio, however, varies greatly. In the night- blooming cereus there are about 250,00
RMRDWA72–. Botany for high schools and colleges. Botany. CaSLOBLASTE^. 853 oosphere immediately begins to secrete a wall of cellulose about itself, and it thus becomes an oospore {F, Fig. 170). According to Pringsheim, the oospore remains for three months in a resting state before germinating; in the latter process the outer coat of the spore splits, and through the opening a tube grows out which eventually assumes the form and dimensions of the full-grown plant. £. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration an
RMRE2J26–. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. Fig. 466. — Spore print of a gilled mushroom. of this expanded fruiting membrane that the class of mush- rooms we are considering gets its botanical name, Hymeno- mycetes, membrane fungi. The hymenium is not always borne on gills, but is arranged in various ways which serve as a convenient basis for distinguishing the different orders. In the tube fungi, to which the edible boletus belongs (Figs. 464, 465), the basidia are placed along the inside of little tubes that line
RMRH28TH–. The British rust fungi (Uredinales), their biology and classification. Uredineae. uredospores v The Uredospores. The germ-tube soon forms a more or less extensive my- celium, which may penetrate the greater part of the leaf of the Carex, but in many species of Puccinia is strictly localised to a small defined spot. All its cells are binucleate, like the spore from which it originated. The cells of the mycelium, in every stage, send haustoria into the cells of the host; when an haustorium arises from a binucleate mycelium, it is itself. Fig. 8. Section of leaf of Carc.v paludosa, with a sorus
RMRE1GJ8–. Fungi; their nature, influence, and uses;. Fungi. Fio. 56.—Spores of Pestalozsia. Fio. 57.—Bispora mtmilimdes. joints, each joint of which possesses the fanction of a spore. In some instances the threads are connate, side by side, as in Torula Ttysterioides, and in Speira, being concentrically arranged in laminas in the latter genus. The structure in Sporochisma is very peculiar, the joints breaking up within an external tube or membrane. The spores in Sporidesmium appear to consist of irregular masses of cells, agglomerated into a kind of compound spore. Most of the species become pulverule
![. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIFBRALES 93 the stalk cell and body cell (Fig. 69, L). In tMs case tlie two cells, so far as we have observed or seen figured, are " fore and aft" with reference to each other, and not side by side, as in Cycads and Ginkgo, the stalk cell being nearer the old spore wall. It appears, therefore, that the generative cell per- sists for about eleven months without dividing. The pollen tube branches as it traverses the nucellus, not so extensively as do the tubes of Cycads and Ginkgo, but sufficiently Stock Photo](https://c8.alamy.com/comp/RE2HGG/morphology-of-spermatophytes-part-i-gymnosperms-gymnosperms-plant-morphology-conifbrales-93-the-stalk-cell-and-body-cell-fig-69-l-in-tms-case-tlie-two-cells-so-far-as-we-have-observed-or-seen-figured-are-quot-fore-and-aftquot-with-reference-to-each-other-and-not-side-by-side-as-in-cycads-and-ginkgo-the-stalk-cell-being-nearer-the-old-spore-wall-it-appears-therefore-that-the-generative-cell-per-sists-for-about-eleven-months-without-dividing-the-pollen-tube-branches-as-it-traverses-the-nucellus-not-so-extensively-as-do-the-tubes-of-cycads-and-ginkgo-but-sufficiently-RE2HGG.jpg ". Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIFBRALES 93 the stalk cell and body cell (Fig. 69, L). In tMs case tlie two cells, so far as we have observed or seen figured, are " fore and aft" with reference to each other, and not side by side, as in Cycads and Ginkgo, the stalk cell being nearer the old spore wall. It appears, therefore, that the generative cell per- sists for about eleven months without dividing. The pollen tube branches as it traverses the nucellus, not so extensively as do the tubes of Cycads and Ginkgo, but sufficiently Stock Photo")
RMRE2HGG–. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIFBRALES 93 the stalk cell and body cell (Fig. 69, L). In tMs case tlie two cells, so far as we have observed or seen figured, are " fore and aft" with reference to each other, and not side by side, as in Cycads and Ginkgo, the stalk cell being nearer the old spore wall. It appears, therefore, that the generative cell per- sists for about eleven months without dividing. The pollen tube branches as it traverses the nucellus, not so extensively as do the tubes of Cycads and Ginkgo, but sufficiently
RMRH8E4C–. Botany of the living plant. Botany; Plants. CoNTOrrsOr Embryo-Sac (Haploid) CONTENTS Of Pollen-grain-tube Fig. 257.. comparison with types of vegetation lower in the scale (Fig. 257). It will be found in them all that the leading events succeed one another in a sequence that is uniform, however different the details may appear. Two critical points in the cycle are marked by the fact that the individual life is there presented in each case by a single cell. They are the Spore and the Zygote : the former follows on reduction, and. Please note that these images are extracted from scanned page i
![. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VII] USTILAGINALES 189 formation of clamp-connections (fig. I53«), or between unrelated cells through a conjugation tube (fig. IS3(^). Where basidiospores are formed they conjugate in a similar manner. In every case the nucleus of one of the paired cells passes over into the other, and the two nuclei lie close together, though without fusion. The mycelium throughout the develop- ment of the host plant consists of binucleate cells and breaks up in spore- formation into binucleate segments (fig. 152 a). Each young spore has thus two nuclei Stock Photo](https://c8.alamy.com/comp/RDX0XE/fungi-ascomycetes-ustilaginales-uredinales-fungi-vii-ustilaginales-189-formation-of-clamp-connections-fig-i53-or-between-unrelated-cells-through-a-conjugation-tube-fig-is3-where-basidiospores-are-formed-they-conjugate-in-a-similar-manner-in-every-case-the-nucleus-of-one-of-the-paired-cells-passes-over-into-the-other-and-the-two-nuclei-lie-close-together-though-without-fusion-the-mycelium-throughout-the-develop-ment-of-the-host-plant-consists-of-binucleate-cells-and-breaks-up-in-spore-formation-into-binucleate-segments-fig-152-a-each-young-spore-has-thus-two-nuclei-RDX0XE.jpg ". Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VII] USTILAGINALES 189 formation of clamp-connections (fig. I53«), or between unrelated cells through a conjugation tube (fig. IS3(^). Where basidiospores are formed they conjugate in a similar manner. In every case the nucleus of one of the paired cells passes over into the other, and the two nuclei lie close together, though without fusion. The mycelium throughout the develop- ment of the host plant consists of binucleate cells and breaks up in spore- formation into binucleate segments (fig. 152 a). Each young spore has thus two nuclei Stock Photo")
RMRDX0XE–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. VII] USTILAGINALES 189 formation of clamp-connections (fig. I53«), or between unrelated cells through a conjugation tube (fig. IS3(^). Where basidiospores are formed they conjugate in a similar manner. In every case the nucleus of one of the paired cells passes over into the other, and the two nuclei lie close together, though without fusion. The mycelium throughout the develop- ment of the host plant consists of binucleate cells and breaks up in spore- formation into binucleate segments (fig. 152 a). Each young spore has thus two nuclei
RMREF940–. Comparative morphology of Fungi. Fungi. 142 COMPARATIVE MORPHOLOGY OF FUNGI cease, and thus hyphae may form sprout cells and asci simultaneously. One finds even young asci which continue to cut off sprout cells until they begin spore formation. Periods of vegetative growth and fructification are thus not sharply separated from each other. The asci contain four spores of a peculiar hat shape, such as we shall meet later in Endomyces decipiens and in Willia of the Saccharomyceta- cese. At germination they throw off the exospore and germinate with either germ tube or sprout mycelium (Dombrowski
RMRDE67T–. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. Spore GERMiNATrNG with Tube Germinating Tube among ENTERING SfOMATA; SEEN CELLS OF LEAF; SEEN FROM FROM ABOVE SIDE which becomes swollen with light green spots. Soon the skin breaks apart and the fungus threads produce great numbers of small round spores. The small swollen places where these spores are produced are called cecidia (singular, cecidiuni), and the spores produced in them are called CBcid- «fl/-spores or spring spores, because they develop in spring. These spri
RMRHKNHP–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. INVASION TUBE ASSEMBLY 131. Figure 2. Light optics showing discharging SpraKiiea laphii spores prelaheled with DAPI and examined with DIG imaging. (A) The discharged spore invasion tube has emerged (arrow) with the nucleus (DAPI- hlue stain) at the tube tip. Note the fully emerged sporoplasm (sp) from another spore. (B and C) Sporoplasmic sac emerging at the invasion tube tip (arrows). (D) The sporoplasmic sac has fully emerged, but the nucleus (arrow) is still within the invasion tube. (E) Nucleus is emerging into the sporo
RMRDD1M2–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 114 DIVISION I.—GENERAL MORPHOLOGY. In compound spores each merispore germinates in the same way as a simple spore or has the power of doing so (see Fig. 59 C). It is not uncommon to see a germ-tube proceeding from almost every merispore, even where they are many in number, as in Pleospora herbarum and Cucurbitaria Labumi. Sometimes certain merispores only germinate as a rule, and if the cells are arranged in a simple row his is usually the case with one or both the t
RMRH28X7–. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. s GERMINATION OF .-KCIDlo.SPoKEs The germ-tube of the secidiospoiv of /'. ('ariri.s can grow bo a Length ten or twenty times greater than the diameter of the spores, and often executes, at Leasl in water, a number ol spiral turns (Fig. 6); it remains nearly of the same diameter t hroughout, or may bear shor( stump} branches here and there. The granular contents of the spore travel along the tube with its growth, remaining always towards the distal end. But unless the germinating spore has falle
![. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. i 102 ELEMENTS OP STRUCTURAL BOTANY.. 342. We shall now coiisidf;r tlie mode of reproduction in the Mosses. Let us comuieiice with the spore. This, upon meeting with proper conditions, bursts its outer coat (the f'.vnsjH)?'e), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thj-(> Stock Photo](https://c8.alamy.com/comp/RJ2H48/the-elements-of-structural-botany-microform-with-special-reference-to-the-study-of-canadian-plants-to-which-is-added-a-selection-of-examination-papers-plant-anatomy-botany-plantes-botanique-i-102-elements-op-structural-botany-342-we-shall-now-coiisidfr-tlie-mode-of-reproduction-in-the-mosses-let-us-comuieiice-with-the-spore-this-upon-meeting-with-proper-conditions-bursts-its-outer-coat-the-fvnsjhe-and-the-inner-coat-the-endospore-is-then-pro-truded-as-a-slender-tube-this-continues-to-grow-by-repeated-divi-sion-until-at-length-in-most-cases-a-tangled-thj-gt-RJ2H48.jpg ". The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. i 102 ELEMENTS OP STRUCTURAL BOTANY.. 342. We shall now coiisidf;r tlie mode of reproduction in the Mosses. Let us comuieiice with the spore. This, upon meeting with proper conditions, bursts its outer coat (the f'.vnsjH)?'e), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thj-(> Stock Photo")
RMRJ2H48–. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. i 102 ELEMENTS OP STRUCTURAL BOTANY.. 342. We shall now coiisidf;r tlie mode of reproduction in the Mosses. Let us comuieiice with the spore. This, upon meeting with proper conditions, bursts its outer coat (the f'.vnsjH)?'e), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thj-(>
RMREFD08–. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. FIG. 6. a and b Podosphaera Castagnei, LeV. a epidermal cells of Melampyritm sylvaticum; a branched mycelial hypha is creeping over the surface and has sent a haustorium into one of the cells (surface view), b vertical section through epidermal cells with mycelial hypha and a haustorium which has penetrated into a cell, c a spore (gonidium) of Erysipke Umbelliferarum putting forth germ-tubes on the epidermis of Anthriscus sylvestris. The smaller germ-tube on the right is send
RMRH8XN5–. Botany for high schools. Botany. FUNGI, DOWNY MILDEWS blight, early potato blight,* etc. During 1849 the potato blight caused almost the complete loss of the potato crop in Ireland, and a serious famine resulted. 415. The mycelium.—The mycelium attacks the leaves, stems, and fruit. The germ tube from a spore enters at a stomate of the leaf or between epidermal cells. The mycelium grows be- tween the cells in the intercellular spaces, and is thus said to be intercellular. The mycelium is con- tinuous and multinu- cleate. It develops short special branch- es, of different form in different spe
RMRE1JJT–. Plant studies; an elementary botany. Botany. Fig. 239. A branch of Peronospora in contact with two celle of a host plant, and sending into them its large haustoria.âAfter DeBaey.. JPt 'â Fig. 240. Peronospora, one of the Phycomycetes, ehowing at a an oogonium (o) con- taining an egg, and an antheridium (n) in contact; at o the antheridial tube pene- trating the oogonium and discharging the contents of the antheridium into the egg; at c the oogonium containing the oospore or resting spore.âAfter DeBaet.. Please note that these images are extracted from scanned page images that may have been d
![. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 342. We shall now coiisidf;r tlie mode of reproduction in the Mosses. Let us comuieiice with the spore. This, upon meeting with proper conditions, bursts its outer coat (the f'.vnsjH)?'e), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thj-(>ad-like mass of vege- tation is produ Stock Photo](https://c8.alamy.com/comp/RJ2H40/the-elements-of-structural-botany-microform-with-special-reference-to-the-study-of-canadian-plants-to-which-is-added-a-selection-of-examination-papers-plant-anatomy-botany-plantes-botanique-342-we-shall-now-coiisidfr-tlie-mode-of-reproduction-in-the-mosses-let-us-comuieiice-with-the-spore-this-upon-meeting-with-proper-conditions-bursts-its-outer-coat-the-fvnsjhe-and-the-inner-coat-the-endospore-is-then-pro-truded-as-a-slender-tube-this-continues-to-grow-by-repeated-divi-sion-until-at-length-in-most-cases-a-tangled-thj-gtad-like-mass-of-vege-tation-is-produ-RJ2H40.jpg ". The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 342. We shall now coiisidf;r tlie mode of reproduction in the Mosses. Let us comuieiice with the spore. This, upon meeting with proper conditions, bursts its outer coat (the f'.vnsjH)?'e), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thj-(>ad-like mass of vege- tation is produ Stock Photo")
RMRJ2H40–. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 342. We shall now coiisidf;r tlie mode of reproduction in the Mosses. Let us comuieiice with the spore. This, upon meeting with proper conditions, bursts its outer coat (the f'.vnsjH)?'e), and the inner coat (the endospore) is then pro- truded as a slender tube. This continues to grow by repeated divi- sion, until at length, in most cases, a tangled thj-(>ad-like mass of vege- tation is produ
RMRDE3DH–. Minnesota plant diseases. Plant diseases. 296 Minnesota Plant Diseases. saprophytic stage, beginning with the germination of the spore and ending with the formation of an infection tube by the sec- ondary and tertiary spores. The secondary and tertiary spores, produced by the smut spore, are capable of living in a nutrient solution or in fresh manure, where they may form a saprophytic mycelium or may continue to bud off more spores in a yeast-like fashion. They may live thus for years, and when finally brought into contact with the seedling plant, they may still cause infection.. Fig. 147.—S
RMRH93KG–. Botany for high schools. Botany. 2/8 GENERAL MORPHOLOGY OF PLANTS formed on the pro mycelium germinate and the germ tube enters the oat seedling at the base of the first leaf sheath. In the case of the loose smut of wheat and barley the method of infection is different. At the time the wheat or barley is in flower, the smut on the affected plants in the field is just ripening, and spores are blown from the smutted heads to the open flowers of healthy plants. The spores lodge on the feathery style of the flower and germinate. They do not produce a promycelium, but the germ tube of the spore e
![. Cranberries; : the national cranberry magazine. Cranberries. Supt. Doughty removes glass slide inserted into test tube of bazooka- like spore trap for determining when to spray for tip blight. Board dike behind him is used in floodng bog for harvest when berries are held high by water for picking with "egg-beater." Bazookas and Sprays for Cranberry Blig By ROBERT L. SINCOOK, Field Editor (Editor's Note: The following consists of excerpts of an article in "The Washington Farmer.") Strange "weathervanes" that look like bazookas were fixtures this summer in Washing Stock Photo](https://c8.alamy.com/comp/RE6BGY/cranberries-the-national-cranberry-magazine-cranberries-supt-doughty-removes-glass-slide-inserted-into-test-tube-of-bazooka-like-spore-trap-for-determining-when-to-spray-for-tip-blight-board-dike-behind-him-is-used-in-floodng-bog-for-harvest-when-berries-are-held-high-by-water-for-picking-with-quotegg-beaterquot-bazookas-and-sprays-for-cranberry-blig-by-robert-l-sincook-field-editor-editors-note-the-following-consists-of-excerpts-of-an-article-in-quotthe-washington-farmerquot-strange-quotweathervanesquot-that-look-like-bazookas-were-fixtures-this-summer-in-washing-RE6BGY.jpg ". Cranberries; : the national cranberry magazine. Cranberries. Supt. Doughty removes glass slide inserted into test tube of bazooka- like spore trap for determining when to spray for tip blight. Board dike behind him is used in floodng bog for harvest when berries are held high by water for picking with "egg-beater." Bazookas and Sprays for Cranberry Blig By ROBERT L. SINCOOK, Field Editor (Editor's Note: The following consists of excerpts of an article in "The Washington Farmer.") Strange "weathervanes" that look like bazookas were fixtures this summer in Washing Stock Photo")
RMRE6BGY–. Cranberries; : the national cranberry magazine. Cranberries. Supt. Doughty removes glass slide inserted into test tube of bazooka- like spore trap for determining when to spray for tip blight. Board dike behind him is used in floodng bog for harvest when berries are held high by water for picking with "egg-beater." Bazookas and Sprays for Cranberry Blig By ROBERT L. SINCOOK, Field Editor (Editor's Note: The following consists of excerpts of an article in "The Washington Farmer.") Strange "weathervanes" that look like bazookas were fixtures this summer in Washing
RMRHKNGN–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. INVASION TUBE ASSEMBLY 133. Figure 5. Digital sequential frame subtractions showing Nile-red-labeled Spiu^iicti lophn spore undergoing tube discharge and sporoplasmic sac emergence. Each image represents a 30-ms shift in the video. (A-F) The invasion tube is emerging, with the highest level of membrane fluorescence at the tube tip (arrows). (G and H) Fluorescence is greatest in the extruded sporoplasmic sac (arrows), while the remaining tube has lost much of the fluorescence. trusion tube. During tube assembly, the PFP first
RMRDYF0J–. A textbook of botany for colleges and universities ... Botany. Fig. 44S. — Diagram of embryo sac (containing fe- male gametophyte) of Dioon, showing two archegonia and the archegonial chamber.— After Chamberlain.. Figs. 449-456. — Male gametophyte of Cycas revoluta: 449, shedding stage of micro- spore (pollen grain), showing persistent vegetative cell, generative cell, and tube cell; 450, later stage (after shedding), showing rounded-off vegetative and generative cells (tube nucleus has passed into the pollen tube); 451, division of nucleus of generative cell into nuclei of stalk and body ce
RMRDE375–. Minnesota plant diseases. Plant diseases. 34° Minnesota Plant Diseases. host plant, living in one cell of the host. When it forms spores it develops a long tube, which reaches to the surface of the host plant and throws out spores, which are provided with swimming lashes and by means of these swim in raindrops or in the dew. The swimming spores come to rest and invade the same or other plants. A thick-coated, resting winter-spore is produced inside of the host and this may carry the plant over to the fol- lowing year. Diseased plants should therefore be burned and cabbages should not be pla
RMREF6FY–. Comparative morphology of Fungi. Fungi. BASIDIOMYCETES 397 migrates into the germ tube, while the other remains in the spore. A septum is formed between them and the germ tube grows to a more or less elongate uninucleate mycelium. In the third type, which includes Coprinus fimetarius, Pholiota praecox, Hypoloma perplexum and Armiliaria mucida (Nichols, 1905, Levine, 1913; Bensaude, 1918), the mature basidiospores may be uni- or binu- cleate. The two nuclei migrate rapidly into the young germ tube (occasionally branched) and complete a large number of mitoses without laying down septa (Fig. 2
RMRDWB0Y–. Plants; a text-book of botany. Botany. Fig. 40. Pi'/oni's/iora, one of the Phycomycetes, Bhowing at a an oojjonium (o) con- taining an egg, and an antheridium (n) in contact; at b the antheridial tube pene- trating the oogonium and discharging the contents of the antheridium into the egg; at c the oogonium containing the oospore or resting spore.—.fter DeBary. In certain conditions special branches arise from the mycelium, which organize antheridia and oogonia, and remain within the host (Fig. 40). The oogonium is of the usual sjiherical form, organizing a single egg. The an-. Please note t
RMRHG8RD–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 212 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS Reference: Biul. Bull. 203: 212. (October 2002) Peroxisomal Catalase in Extrusion Apparatus Posterior Vacuole of Microsporidian Spores Earl Weiilni-r and Ann Fimlle} (Biologv, Louisiana State University, Baton Rouge, Louisiana 20803) A remarkable survival adaptation of microsporidians is the spore extrusion apparatus (EXA), which is equipped to explosively discharge a tube through which the infective sporoplasm is sent into a host cell. The EXA consists of a membrane-asso
![. Morphology of gymnosperms. Gymnosperms; Plant morphology. 39° MORPHOLOGY OF GYMNOSPERMS After reaching the deep pollen chamber, the exine of the spore is sloughed off and the intine with its contents is completely freed. The two prothallial cells soon disappear, and the nucleus of the body cell divides to form two equal male nuclei. The tube nucleus moves around the cavity of the grain and comes to rest against the wall, and soon after the pollen tube is put out from this point of contact. 439 440 44.1" Figs. 436-441.—Ephedra irifurea: germination of the microspore; ^, first prothal- li Stock Photo](https://c8.alamy.com/comp/RDH5X6/morphology-of-gymnosperms-gymnosperms-plant-morphology-39-morphology-of-gymnosperms-after-reaching-the-deep-pollen-chamber-the-exine-of-the-spore-is-sloughed-off-and-the-intine-with-its-contents-is-completely-freed-the-two-prothallial-cells-soon-disappear-and-the-nucleus-of-the-body-cell-divides-to-form-two-equal-male-nuclei-the-tube-nucleus-moves-around-the-cavity-of-the-grain-and-comes-to-rest-against-the-wall-and-soon-after-the-pollen-tube-is-put-out-from-this-point-of-contact-439-440-441quot-figs-436-441ephedra-irifurea-germination-of-the-microspore-first-prothal-li-RDH5X6.jpg ". Morphology of gymnosperms. Gymnosperms; Plant morphology. 39° MORPHOLOGY OF GYMNOSPERMS After reaching the deep pollen chamber, the exine of the spore is sloughed off and the intine with its contents is completely freed. The two prothallial cells soon disappear, and the nucleus of the body cell divides to form two equal male nuclei. The tube nucleus moves around the cavity of the grain and comes to rest against the wall, and soon after the pollen tube is put out from this point of contact. 439 440 44.1" Figs. 436-441.—Ephedra irifurea: germination of the microspore; ^, first prothal- li Stock Photo")
RMRDH5X6–. Morphology of gymnosperms. Gymnosperms; Plant morphology. 39° MORPHOLOGY OF GYMNOSPERMS After reaching the deep pollen chamber, the exine of the spore is sloughed off and the intine with its contents is completely freed. The two prothallial cells soon disappear, and the nucleus of the body cell divides to form two equal male nuclei. The tube nucleus moves around the cavity of the grain and comes to rest against the wall, and soon after the pollen tube is put out from this point of contact. 439 440 44.1" Figs. 436-441.—Ephedra irifurea: germination of the microspore; ^, first prothal- li
RMRDC12K–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. EXOBASIDIUM. 425 from each a spindle-shaped spore is abjointed (Fig. 257). The basidiospores divide in water by formation of cross-septa, and a germ-tube arises from each terminal cell. On a young leaf of Vaccinmm the germ-tube penetrates and gives rise to a mycelium (Fig. 258); on other substrata the germ-tube sprouts into several very fine sterigmata, from the extremi- ties of which a series of conidia are abjoint
RMRDWG4D–. Nature and development of plants. Botany. Fig. 132. Fig. 133. Fig. 132. Asexual reproduction of the mildew: A, hyphae of Plasmo- para emerging from a stoma and bearing numerous sporangia. B, enlarged view of sporangium of Peronospora germinating on a dry leaf. In this case the sporangium behaves as a spore sending out a hypha that will penetrate the tissues of the leaf. C, sporangium of Phytophthora germinating in the water and forming zoospores. D, zoospore enlarged. E, zoospore has come to rest and is forming a tube that will penetrate the tissues of the leaf as in the case of 5. Fig. 133.
![. The American florist : a weekly journal for the trade. Floriculture; Florists. Fig. 20. Volutella. ends of certain mycelial threads from a^ar culture. Magnilled 30 times more thau"the scale. Fig. 21. Rosette. From a photograph. curved or hooked near their free ends. Several spores are borne in succession from the ends. Frequently the fruit- ing threads branch several times near their ends, and the spore production Is much like that in Fusarium. When transplantlngs of the spores are made Into a culture tube of agar the threads grow out in a radiating fash- of the mycelium appears much ea Stock Photo](https://c8.alamy.com/comp/RP9KEW/the-american-florist-a-weekly-journal-for-the-trade-floriculture-florists-fig-20-volutella-ends-of-certain-mycelial-threads-from-aar-culture-magnilled-30-times-more-thauquotthe-scale-fig-21-rosette-from-a-photograph-curved-or-hooked-near-their-free-ends-several-spores-are-borne-in-succession-from-the-ends-frequently-the-fruit-ing-threads-branch-several-times-near-their-ends-and-the-spore-production-is-much-like-that-in-fusarium-when-transplantlngs-of-the-spores-are-made-into-a-culture-tube-of-agar-the-threads-grow-out-in-a-radiating-fash-of-the-mycelium-appears-much-ea-RP9KEW.jpg ". The American florist : a weekly journal for the trade. Floriculture; Florists. Fig. 20. Volutella. ends of certain mycelial threads from a^ar culture. Magnilled 30 times more thau"the scale. Fig. 21. Rosette. From a photograph. curved or hooked near their free ends. Several spores are borne in succession from the ends. Frequently the fruit- ing threads branch several times near their ends, and the spore production Is much like that in Fusarium. When transplantlngs of the spores are made Into a culture tube of agar the threads grow out in a radiating fash- of the mycelium appears much ea Stock Photo")
RMRP9KEW–. The American florist : a weekly journal for the trade. Floriculture; Florists. Fig. 20. Volutella. ends of certain mycelial threads from a^ar culture. Magnilled 30 times more thau"the scale. Fig. 21. Rosette. From a photograph. curved or hooked near their free ends. Several spores are borne in succession from the ends. Frequently the fruit- ing threads branch several times near their ends, and the spore production Is much like that in Fusarium. When transplantlngs of the spores are made Into a culture tube of agar the threads grow out in a radiating fash- of the mycelium appears much ea
RMREF43B–. A compendium of general botany. Plants. REPRODUCTION. 201 idea; only the speculative fantasy of the theory of descent finds it necessary to construct concrete connecting links between these existing contrasts. In regard to the difterences just mentioned, the following shall now be mentioned, although the beginner will only comprehend the subject fully from what will be stated later. 1. No pollen-grain of a phanerogamic plant is capable of pro- ducing motile sjDermatozoids, wdiile on the other hand no micro- spore of a vascular cryptogam can develop a pollen-tube. 2. By comparing the phanerog
RMRGBBEB–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. APPLE BLOTCH AND ITS CONTROL. 6.5 [x. When newly formed it is easy to demonstrate the presence of a gelatinous covering about the spore, especially when, as is often the case, it is prolonged into a stout hyaline appendage (fig. 2). The spores (fig. 3) germinate in 15 to 20 hours. The germ tube is some- what darker than the spore and usually shows a pronounced thickening at the point of emer- gence (fig. 3). More than one germ tube may issue from a single spore (fig. 3). Spores from the twig cankers in which the fungus
RMRH808G–. Botany of the living plant. Botany; Plants. Fig. 332. Germinating uredospores, showing various stages of development of the germ- tubes, a, b, c. Very highly magnified. (After Marshall Ward.) but later in the season. They differ from them in being closely packed and firmly attached, as well as in structure. Each spore is spindle- shaped, and is partitioned into two cells, each with a dark brown coat (Fig. 334)- Like other cells of the mycelium and the uredospores. Fig. 333- Longitudinal section of a leaf of Wheat, showing a germ-tube from a uredospore passing through a stoma (a) into the int
RMRGW29C–. Bulletin. Natural history; Natural history. 202 ILLINOIS NATURAL HISTORY SURVEY BULLETIN '(jl. 21, Alt. 6 each spore pushes out as an evagination of Spore germination as high as 66 per cent the spore cell wall, and the cell contents occurs in approximately 10 hours. This pass from the spore into the germ tube. high germination percentage is obtained. Fig. 2.—Dothiorella dieback on red oak. The brown to black, cankerous bark ot each branch contains numerous black, erumpent stromata of Dolhiorelta. X 2.. Please note that these images are extracted from scanned page images that may have been d
RMRHKNH6–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 132 E. WEIDNER AT AL. Figure 4. Video sequence showing Nile-red-labeled Spru.viicu lop/iu spore undergoing tube discharge. (A-E) The fluorescence is higher at the tube tip; ultrastructural images show this area to have two membrane cylinders. (F)Tube is completely assembled and the membrane has emerged into a sporoplasmic sac. Arrows show the end of the extruding tube (A-E) and sporoplasm (F). ends. With the completion of tube assembly (65-70 membrane sacs emerged followed by a flow of sporoplasm into the sacs. We used DIC i
RMRDAA49–. A text-book of botany for secondary schools. Botany. FlG. 225.—Pollen grain containing a three - celled male gameto- phyte; one cell represented by its nucleus, the two other cells being male ceils. Fig. 226.—The female gametophyte of a lily before fertilization, within the old mega- spore wall eight cells or their nuclei appear- ing, one of which is an egg (e); the pollen tube enters through the micropyle (m). nium to contain it being formed. These seven cells repre- sent the female gametophyte before fertilization (Fig. 226). The sperms produced by the pollen must reach the egg within the
RMRH8N07–. Botany of the living plant. Botany; Plants. .sec â pr JV . « m m. Fig. 447. Fritschiella tuberosa. A small mature plant with a single rhizoid. c/=cluster; pr= primary; sec = secondary branch. ( x 350.) (After Iyengar.) Fig. 448. Riccia trichocarpa. Young sporeling showing spore and germ-tube, k ; rhizoid, r ; and the thallus enlarging upwards with sunken apex, and intercellular spaees beginning to develop. ( x 85.) (After Campbell.) that end in obconical sporelings, as their size increases. They are all taken from gametophytes. But both of the alternating phases of the life-cycle are subjec
RMRH80M8–. Botany of the living plant. Botany; Plants. 408 BOTANY OF THE LIVING PLANT (Fig. 308). Coming then to rest, the cilia are dropped: each zoo- spore rounds itself off, and, investing itself with a wall, puts out a hyphal tube. If this takes place on the surface of a potato leaf, as it well might do under conditions of rain or heavy dew, all is ready for the infection. This may be either by entry through the pore of a. Fig. 307. Section of Potato-leaf, in the tissues of which is the mycelum of Phytophthora. The hyphae run between the cells and send out through the stomata, a, c, d, the aerial b
RMREE50P–. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. FIG. 128. Pucciniagraminis. .-/ a pair of teleutospores/germinating with pro mycelium and sporidia sp. /â >' a promycelium with sporidia sj> torn from the spore. C epidermis of the under surface of the leaf of Berberis vulgaris with a germinating sporidium sf, tin- germ-tube from which has penetrated at 1 into an epidermal cell. l'ispore putting out a germ-tube fourteen hours after being placed on v atn the empty spore-membrane. C, D magn. 390 times, A, B somewhat more
RMRHKNJF–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 130 E. WEIDNHR ET II ' ii' * -,'•*•.-, , ^ Jl . • , ^ibWvaA^o- - B. v - • Figure I. Electron micrographs of microsporidian extrusion apparatus. (-) I'nfired spore of Spraguea loplui with ascending part of polar filament protein (PFP) surrounded by membrane pleats. (B) Partially discharged spore is shown in section: the double cylinders of membrane are apparent (M). as is the exteriorized PFP (S). (C| Negative-stained invasion tube shows outer protein envelope (arrow) and an inner membrane cylinder bearing what appears to be
RMRDY60R–. Botany of the living plant. Botany. Fig. 379. Longitudinal section of a leaf of Wheat, showing a germ-tube of a C/retio-spore passing through a stoma {a) into the intercellular space {b). Very highly magnified. (After Marshall Ward.) Sections through a diseased leaf of wheat in summer reveal the branched and septate hyphae closely packed in the inter-cellular spaces, and investing the green cells. They accumulate below the epidermis, forming a spore-bed, their endings swelling^into thejuredo-. Fig. 380. Longitudinal section through a patch of the Teleuto-sporcs of Pucciuia, on a stalk of Whe
RMRDY61D–. Botany of the living plant. Botany. EU-MYCETES.—(fe) BASIDIOMYCETES 445 the uredo-spores and teleuto-spnres are on leaves of species of Carex, and the aecidium-stage on the common Nettle, causing contorted swellings upon its stem and leaves. Thus the Rust of Wheat is an example of a life-history that is not uncommon.. Fig. 379. Longitudinal section of a leaf of Wheat, showing a germ-tube of a C/retio-spore passing through a stoma {a) into the intercellular space {b). Very highly magnified. (After Marshall Ward.) Sections through a diseased leaf of wheat in summer reveal the branched and sept
![. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. FlC. iz8. Pucctnia ^ramittis. A a. pair of tdeutospores t germinating with pro- mycelium and sporidia sj>. B a promycelium with sporidia sp torn from the spore. C epidermis of the under surface of the ]ea£ of Berdert's vu^£-aris vnth a germinating sporidium sp, the germ-tube from which has penetrated at i into an epidermal cell. Jy uredospore putting out a germ-tube fourteen hours after being placed on water. Four equatorial germ-pores are seen on the empty spore-m Stock Photo](https://c8.alamy.com/comp/RDEABN/comparative-morphology-and-biology-of-the-fungi-mycetozoa-and-bacteria-plant-morphology-fungi-myxomycetes-bacteriology-flc-iz8-pucctnia-ramittis-a-a-pair-of-tdeutospores-t-germinating-with-pro-mycelium-and-sporidia-sjgt-b-a-promycelium-with-sporidia-sp-torn-from-the-spore-c-epidermis-of-the-under-surface-of-the-ea-of-berderts-vu-aris-vnth-a-germinating-sporidium-sp-the-germ-tube-from-which-has-penetrated-at-i-into-an-epidermal-cell-jy-uredospore-putting-out-a-germ-tube-fourteen-hours-after-being-placed-on-water-four-equatorial-germ-pores-are-seen-on-the-empty-spore-m-RDEABN.jpg ". Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. FlC. iz8. Pucctnia ^ramittis. A a. pair of tdeutospores t germinating with pro- mycelium and sporidia sj>. B a promycelium with sporidia sp torn from the spore. C epidermis of the under surface of the ]ea£ of Berdert's vu^£-aris vnth a germinating sporidium sp, the germ-tube from which has penetrated at i into an epidermal cell. Jy uredospore putting out a germ-tube fourteen hours after being placed on water. Four equatorial germ-pores are seen on the empty spore-m Stock Photo")
RMRDEABN–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. FlC. iz8. Pucctnia ^ramittis. A a. pair of tdeutospores t germinating with pro- mycelium and sporidia sj>. B a promycelium with sporidia sp torn from the spore. C epidermis of the under surface of the ]ea£ of Berdert's vu^£-aris vnth a germinating sporidium sp, the germ-tube from which has penetrated at i into an epidermal cell. Jy uredospore putting out a germ-tube fourteen hours after being placed on water. Four equatorial germ-pores are seen on the empty spore-m
RMRH8HA1–. Botany for high schools. Botany. Fig. 372. Sperms of zamia in pollen tube; pg, pollen grain; an, sperms. (After Webber.) Fig. 373. Sperm of zamia, show- ing spiral row of cilia. (After Webber.) Europe, America, and other countries, as an ornamental tree. It is the sole survivor of a group of plants which were very abundant in geological times. The leaves are triangular, radi- ately veined, and resemble in form the pinnules of the maiden hair fern (Adianfum). The large spore cases form a fleshy fruit, about the size of a plum, with a soft exocarp and a stony endocarp, the meat within being th
RMRR30T4–. The actinomycetes: their nature, occurrence, activities, and importance. Actinomyces; Actinomycetales. im. Fig. 13.—Details ot spoiulation and of spore germination by S. griseiis as shown by electron microscope: Top, left, aerial sporogenous hypha showing septation prior to spore formation; top, right, more ad'anced stage in spore formation; bot- tom, left, well matured, four-spored chain; center, spore germinated by a single germ tube; bottom, right, spore germinated by two germ tubes Qfroni Carvajal, 64). Note (top, left) mitotic division taking place in developing spores.. Please note th
RMRHKNEW–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 6. DIC imaging of microsporidian spore invasion tubes im- mediately before sporoplasmic sac emergence. These three images show a characteristic funnel-shaped bladder emerging from the tube tip mil- liseconds before the full sporoplasmic sac emerges. Such a shape is pre- dicted when an inner cylinder of membrane is everting and sliding over an outer envelope. Tube thickness is 0.1-0.13 pm. calcium (Weidner, 1982). Also, isolated PFP displays sig- nificant fluidity under //; vitro conditions, although it will not form d
RMRH8HAF–. Botany for high schools. Botany. Fig. 372. Sperms of zamia in pollen tube; pg, pollen grain; an, sperms. (After Webber.) Fig. 373. Sperm of zamia, show- ing spiral row of cilia. (After Webber.) Europe, America, and other countries, as an ornamental tree. It is the sole survivor of a group of plants which were very abundant in geological times. The leaves are triangular, radi- ately veined, and resemble in form the pinnules of the maiden hair fern (Adianfum). The large spore cases form a fleshy fruit, about the size of a plum, with a soft exocarp and a stony endocarp, the meat within being th
RMRH8DMT–. Botany of the living plant. Botany. 446 BOTANY OF THE LIVING PLANT that the germ-tubes emerge when grown in water (Fig. 378). If this germination takes place on a wet leaf of wheat, the tube growing over the surface finds entry by a stoma (Fig. 379), and at once gains access to the nutritive cells. In about a fortnight the infected spot will be producing fresh uredo-spores. The Teleuto-spores arise from the same spore-bed later in the season. They differ in being closely packed and firmly attached, as well as in structure. Each spore is spindle-shaped, and is partitioned. Please note that th
RMRH8DNE–. Botany of the living plant. Botany. I'iG. 3;.j. Longitudinal section of a leaf of Wheat, showing a germ-tube of a Ur«dofore passing through a stoma (a) into the intercellular space (b. Very highly magnified. (After Marshall Ward.) Sections through a diseased leaf of wheat in summer reveal the branched and septate hyphae closely packed in the intcr-cellular spaces, and investing the green cells. They accumulate below the epidermis, forming a spore-bed, their endings swelling into the uredo-. l-ic. 3''o- Longitudinal section through a patch of the IVUnt.' sp.n s ,.i / n.. ..... : . , ... of
RMRHKNFY–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 134 E WEIDNER AT AL. Figure 6. DIC imaging of microsporidian spore invasion tubes im- mediately before sporoplasmic sac emergence. These three images show a characteristic funnel-shaped bladder emerging from the tube tip mil- liseconds before the full sporoplasmic sac emerges. Such a shape is pre- dicted when an inner cylinder of membrane is everting and sliding over an outer envelope. Tube thickness is 0.1-0.13 pm. calcium (Weidner, 1982). Also, isolated PFP displays sig- nificant fluidity under //; vitro conditions, althou
RMRDETCA–. Diseases of bees. Bees. D » ^ 0000000000000000%. Cultures of B. alvei (after Cheyne). A. Colonies on the surface of gela- tine {6 diameters). B. The same colonies 24 hours later. C. Culture tube ; gl. gelatine ; p. cotton wool plug. D. Spore becoming bacillus (1800 diameters.) E. Bacillus becoming a spore. F. Spores in line, taken from a gelatine culture. G. Colony developing.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original wor
RMRDE4N8–. Minnesota plant diseases. Plant diseases. Fig. 29.—Infection of a grass leaf by a rust fungus (wheat rust). Above is a summer spore showing germ-tubes. Below is a germ-tube entering through the pore of the leaf and is reaching down in the internal part of the leaf where it soon becomes well established. After Ward. have its own peculiar form of sucker. The simplest are little cylindrical unbranched threads. Again, they may be small tubercular hyphae; others are branched to form a stubby-fin- gered, hand-like system of threads. In still other cases the suckers may be very much branched and th
RMRDY60H–. Botany of the living plant. Botany. 446 BOTANY OF THE LIVING PLANT that the germ-tubes emerge when grown in water (Fig. ^7^)- H this germination takes place on a wet leaf of wheat, the tube growing over the surface finds entry by a stoma (Fig. 379), and at once gains access to the nutritive cells. In about a fortnight the infected spot will be producing fresh uredo-spores. The Teleuto-spores arise from the same spore-bed later in the season. They differ in being closely packed and firmly attached, as well as in structure. Each spore is spindle-shaped, and is partitioned. Please note that the
RMRHJ8DD–. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. io8 Bulletin 379 solution of 2.5 per cent of glucose and 1 per cent of peptone. No cross- wall was developed. After the third day the wall broke and the contents emerged, forming a bud on the surface of the spore. This spherule may attain a diameter of from 35 to 40 /x; its further development was not followed by Delacroix. The writer has observed similar behavior of pycnospores, except that the swollen parts finally developed a germ tube. This took place in tap water. In some cases ol
![. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 14. Botany; Botany. 30 Phytopathology [Vol. 28. cell a^n'-sletuent^TnU^StU^^^^^^ penetration showing vesicle in epidermal a subepidermal cell. C. Mycelium and haustorium S fhf TF '"P^^*^ haustorium within with short germ tube entering host shoSL ab^nc/nf ? ''^"^ Parenchyma. D. Spore lular type of penetration. E? Diafframmatif ro^Zl i^'^^l^T''"'^ ^"^ ^^e intercel- Uum of a typical unresisted infectfonh^on^h T. *^*'^'' ""^ *^^ «P^^^^ «f the myce- spread Stock Photo](https://c8.alamy.com/comp/RE9M16/contributions-from-the-botanical-laboratory-and-the-morris-arboretum-of-the-university-of-pennsylvania-vol-14-botany-botany-30-phytopathology-vol-28-cell-an-sletuenttnustu-penetration-showing-vesicle-in-epidermal-a-subepidermal-cell-c-mycelium-and-haustorium-s-fhf-tf-quotp-haustorium-within-with-short-germ-tube-entering-host-shosl-abncnf-quot-parenchyma-d-spore-lular-type-of-penetration-e-diafframmatif-rozl-iltquot-quot-e-intercel-uum-of-a-typical-unresisted-infectfonhonh-t-quotquot-p-f-the-myce-spread-RE9M16.jpg ". Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 14. Botany; Botany. 30 Phytopathology [Vol. 28. cell a^n'-sletuent^TnU^StU^^^^^^ penetration showing vesicle in epidermal a subepidermal cell. C. Mycelium and haustorium S fhf TF '"P^^*^ haustorium within with short germ tube entering host shoSL ab^nc/nf ? ''^"^ Parenchyma. D. Spore lular type of penetration. E? Diafframmatif ro^Zl i^'^^l^T''"'^ ^"^ ^^e intercel- Uum of a typical unresisted infectfonh^on^h T. *^*'^'' ""^ *^^ «P^^^^ «f the myce- spread Stock Photo")
RMRE9M16–. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 14. Botany; Botany. 30 Phytopathology [Vol. 28. cell a^n'-sletuent^TnU^StU^^^^^^ penetration showing vesicle in epidermal a subepidermal cell. C. Mycelium and haustorium S fhf TF '"P^^*^ haustorium within with short germ tube entering host shoSL ab^nc/nf ? ''^"^ Parenchyma. D. Spore lular type of penetration. E? Diafframmatif ro^Zl i^'^^l^T''"'^ ^"^ ^^e intercel- Uum of a typical unresisted infectfonh^on^h T. *^*'^'' ""^ *^^ «P^^^^ «f the myce- spread
RMRE2NAK–. Elementary botany. Botany. Fig. 163. Chlamydomonas pulvisculus (Mull.) Ehrb, A, an old motile individual; M, nucleus; p, pyrenoid; s, red eye spot; v, contractile vacuole; B, motile indi- vidual has drawn in its cilia and divided into two; C, mother plant has drawn in its cilia and divided into four non-muJ;ile cells; D, pamella stage; E, female gamete —egg; F, male gamete —sperm; G, early stage of conjugation; H, zygo- spore with conjugating tube and empty male cell attached. (After Wille.) jugate as in G and //, the protoplasm of the smaller one passing over into the larger one, and a zygo
RMRDJ61H–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 372 FUNGOUS DISEASES OF PLANTS Spores single, spore masses dusty, spores without conspicuous tube-like hyaline appendage Tilletia Spores single. Spores in loose groups, imbedded in the tissues. Entyloma Spores agglutinating in balls, spore masses dusty, spore balls invested with a cortex of sterile cells Urocystis II. LOOSE SMUT OF OATS Ustilago Arena (Pers.) Jens. Jensen, J. L. Om Kornsorternes Brand. Copenhagen, 1888. Kellerman, W. A., and Swingle, W. T. Loose Smut of Cereals. Ka
RMRDH67K–. Morphology of gymnosperms. Gymnosperms; Plant morphology. CONIFERALES (PINACEAE) 273 of the first in details, and the two lenticular cells disorganize rapidly (fig. 310), become flattened against the spore wall, and very soon. Figs. 302-313.—Pinus Laricio: a series from the formation of tetrads to the development of the pollen tube; ^, prothallial cells; ^, stalk cell; b, body cell; <, tube nucleus; figs. 302, 303, May 3; fig. 304, May 10; figs. 305-308, May 20; figs. 309-311, May 25; fig. 312, June 15; fig. 313, May i, nearly a year after the stage shown in fig. 312; the exine (c) is sha
RMRN2HWP–. Annales de la science agronomique franaise et trangre. Agriculture; Art -- France; Agriculture experiment stations -- France. 212 ANNALES DE LA SCIENCE AGRONOMIQUE. comme ferment (il/, racemosus, circinelloides, ereclus, spinosus, fragilis, Mucedo). M. Mucedo L. (fig. 1) est une des mucorinées les plus répandues et se rencontre sur toutes les substances albuminoïdes.. Fig. 1. — Mueor Mucedo L. (d'après Brbfeld) '. 1. Spores. —2. Germination des spores : a, distension de la spore; h et c, développement du tube germinatif. — 3. Slycéliuin provenant de la spore a : h, tube sporaugifère terminé
RMRDE1DY–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 5i8 SPECIAL PLANT PATHOLOGY. Fig. 187.—Hollyhock rust, Puccinia malvacearum. i, Typic mature telio- spore; 2-6, different stages in growth of promycelium (basidium); 7, forked promy- celium; 8, basidium dividing into 4 cells; 9, basidium resembling a germ tube; 10—12, cells breaking apart; 13-16, germination of promycelial cells; 17, empty cell; 18, mature basidiospores; 19, 20, same in germination; 25, 26, formation of chlamydo- spore-like bodies in old promycelia. {After Taubenhaus, J
RMRMWH1E–. Annales des Sciences Naturelles Botaniques. 130 LOUIS PLANCHON. les cultures en tube, trouver des passages entre YHormo- dendron et la spore isolée. Les branches, stériles ou non, qui s'étendent dans la gélatine sont très ramifiées : la première. Fig. 34. — Culture en cellule sur gélatine nutritive, a, un jour; 6, deux jours ; c, trois jours ; d, quatre jours. cellule de chaque rameau est assez souvent renflée, mais ce caractère n'est pas absolu. Certaines cultures dans des conditions identiques se montrent plus abondamment et plus rapidement ramifiées : elles sont dans ce cas moins vite fru
RMRH9YGW–. Botanique cryptogamique, ou Histoire des familles naturelles des plantes infrieures. 50 - CRYPTOGAMES. Les Dasycladées offrent une structure un peu plus compliquée. Ce sont des tubes continus dans toute leur longueur comme chez les Vaucheria; mais ces tubes sont couronnés à leur sommet ou environnés, dans tout leur pourtour, d'un ou plusieurs verticilles de rameaux articulés, dont le dernier'article renferme la spore. Les Cymopulia, les Acctabularia, etc., ne sont que des Dasycladées dont le tube principal, an lieu d'être continu, est articulé, et dont les rameaux qui couronnent le s
RMREFA59–. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. Fig. 192. a, bArcyria incarnata, P. in outline, a a ripe spor- angium closed, b the same open with the expanded net-work of the capillitium. c, d Arcyria Serpula, Wigd. (A. anomala, De Bary.) c portion of a capilitium. d a spore, a and* magn. 20, c and d 390 times. Fig. 193. a, b Trickia fallax. Fr. a half of a capillitium-tube. b superficial view of a spore. c, d Trichia chrysosperma, DC. De By. c ex- tremity of a capillitium-tube. d spore. Magn. 390 times. opens on reaching
RMRMXM3P–. Annales des sciences naturelles. Plants; Biology. Fig.7.— Morlierella simplex {Ycin Tit'ghom). Tube sporangifèro. gr. 120; Spores, gr. 320; Stylos- pores, gr. 400 ; Chlamydospo res, gi'. 400 (D'après Van Tie- ghem et Le Monier, Ann. Se. nat. Bot., 1873). Fig. C. — Mortierella reticulata (var. nov. Ma- truchot). — a. Mycélium aérien, montrant la ramification en diapason et portant un pied spo- rangifùre; à la base, on voit l'amorce de deux .sporanges latéraux, g. !)45 : Z», Spore gonflée com- mençant à germer, gr. 840; c et d, Mycélium immergé avec spores aquatiques, gr. 480 : e, Pied sporang
RMRDCEH9–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. Fig. 192. a, bArcyria incarnaia, P. in outline, a a ripe spor- angium dosed, b the same open with the expanded net-work of the capillitium. c, d Arcyria Strputa, Wigd- {A, anomala, De Baiy.) c portion of 3 capilitiuni. d a spore, a and b magn. 20, c and d 390 times. FIG. 193. a, b Trickia fallax, Fr. a half of a capillitium-tube. b superficial view of a spore. c, d Trichia chrysosperma, DC. De By. c ex- tremity of a capiQitium-tube. ^ spore. Magn. 390 times. opens on
RMRMX67A–. Annales des Sciences Naturelles Botaniques. 130 CAMILLE SERVETTAZ sortie à travers t'exôspôre par une action généralement méca- nique qui se manifeste, comme nous le savons, par une déchi- rure ou par une dislocation complète de la paroi ; mais, lorsque celle-ci ne s'ouvre qu'en un point et sans fragmentation, on peut admettre qu'il se produit dans ce cas une sorte de digestion ménagée du tégument externe de la spore. Ce premier filament est de forme assez variable: 1° Le plus souvent, il est allongé en un tube étroit divisé en cellules de trois à cinq fois plus longues que larges, cylindriq
RMRH9XR6–. Botanique cryptogamique, ou Histoire des familles naturelles des plantes infrieures. HEPATIQUES. 13.!> trilif des Algues: nous appellerons thalle le système végétatil des Hépatiques. Quelquefois la spore, au lieu de se partager immédiatement en un certain nombre de cellules, s'allonge d'abord de façon à donner naissance à un tube, et c'est l'extrémité seule de ce tube qui se renfle et devient celluleuse. C'est ce qui a lieu, par exemple, dans le Blasia pu sillet, étudié par M. Gottsche. Entre ce mode de germination et la manière dont M. Sehleiden conçoit la Ger- mination du po
RMRG6E60–. Bulletin. Mycology; Fungi; Fungi. SUR LE PIETIN DES CEREALES. 143 J'ajouterai quelques mots au sujet de la germination que j'ai pu observer sur les spores d'Ophiobolus graminis. Tous les Ophiobolus graminis que j'ai obtenus ont germé identiquement à matuià té par production d'un tube partant des deux extrémités de la spore et se ramifiant laté- ralement (Fig. 1). J'ai cherché inutilement à rencontrer une germination montrant cette sorte de promycélium obtenue par M. Mangin. Je doute donc que l'espèce étudiée par lui soit la même que celle sur laquelle ont porté mes expériences..
RMRMWD5D–. Annales des sciences naturelles. Plants; Biology. 104 I. GALLAUD Li'S lilamciils uni paiiois un (liaiiirlic In-s l'aibli' '2y.i dans lo régions où le feutrag'c csl li-rs s d nul uik; (''|)ais>('ui' variant de 10 à 10;/.. I^cs plus gios soiil loi-nK's de (iihcs gi-i'ininalils eourls. pru ou pas laniilii's. Il< pi(''S('ult'ul a uuc di' leurs cxli'i'milr-^ la •-pore (pii leur a douui'- uaissaucc, cl^. Fig. 1. — A, spore munie cFune papille p, et. d'un tube gcrminalif kM-miné par une deuxième spore. — 1». hasidc. — C, spore vide portant une papille et une baside à tube eoiirt. — I), spore
RMRED0TJ–. Comptes rendus des séances de la Société de biologie et de ses filiales. Biology. Coccidium Kermorganti. 1, Macrogamète en voie d'accroissement. â 2, Coccidîe enkystée. â 3, Kyste sporulé avant là maturité des spores. â 4, Kyste sporulé avec spores mûres. â 5, Spore très grossie. â 6, Corps à mérozoïtes. Mais si l'on consulte la note de Solger et Gabriel, à laquelle se rapporte cette mention, on voit que ces auteurs ont signalé dans les couches mus- culeuse et muqueuse du tube digestif des kystes de la grosseur d'un pois, dans le contenu desquels Gabriel a reconnu des psorosper
RMRGT8DA–. Bulletin biologique de la France et de la Belgique. Biology; Natural history. â 58 â ea tout cas, elle se produit constamment avant que l'on puisse constater l'existence de cloisons délimitant des cellules distinctes. Parfois, mais le cas est assez rare, la spore germe par les deux extrémités de son grand axe, mais alors l'un des deux tubes raycé- liens l'emporte de beaucoup sur l'autre qui demeure rudimentaire.. Fig. 1. â Spores à divers états de germination. s, spores non germées ; o, spores au début de la germination ; a . formation du premier tube mycélial ; b, premières bifurca
RMRCT46T–. Elements of botany. Plants. FERTILIZATION. 159 future plant is to spring. This kind of union is found to occur in many flowerless plants (Chapter XXIII), resulting in the production of a spore very unlike a seed in most re- spects, but capable of grooving into a complete plant like that wliich produced it. 195. Number of Pollen Grains to each Ovule. — Only one pollen tube is necessary to fertilize each ovule, but so many pollen- grains are lost that plants produce many more of them than of ovules. The ratio, however, varies greatly. In the night- blooming cereus there are about 250,000 polle
RMRCD907–. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. Fig. 89—Pucchiiagraminis. i, wheat leaves with uredo pustules ; 2, a uredo sorus ; 3, uredospores in different stages of development; 4, uredospore germinating ; 5, culm of wheat with teleutospore sori; 6, teleutospores in different stages of development ; 7, teleuto- spore that has germinated and produced a germ-tube bearing three sporidiola or secondary spores ; 8, barberry leaf with clusters of aecidia ; 9, section of an aecidium with chains of aecidi
RMRCC3MN–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. EXOBASIDIUM. 425 from each a spindle-shaped spore is abjointed (Fig. 257). The liasidiospores divide in water by formation of cross-septa, and a germ-tube arises from each terminal cell. On a young leaf of Vaccinium the germ-tube penetrates and gives rise to a mycelium (Fig. 258) ; on other substrata the germ-tube sprouts into several very fine sterigmata, from the extremi- ties of which a series of conidia are abjoin
RMRCC3CJ–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. EXOBASIDIUM. 425 from each a spindle-shaped spore is abjointed (Fig. 257). The basidiospores divide in water by formation of cross-septa, and a germ-tube arises from each terminal cell. On a young leaf of Vaccinium the germ-tube penetrates and gives rise to a mycelium (Fig. 258); on other substrata the germ-tube sprouts into several very fine sterigmata, from the extremi- ties of which a series of couidia are abjointe
RMRCC2K9–. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. KXOBASIDIUM. 425 from each a spindle-shaped spore is abjointed (Fig. 257). The basidiospores divide in water by formation of cross-septa, and a germ-tube arises from each terminal cell. On a young leaf of Vaccinium the germ-tube penetrates and gives rise to a mycelium (Fig. 258); on other substrata the germ-tube sprouts into se'eral very fine .sterignuita, from tlie extremi- ties of which a se
RMRDXT7B–. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. Fig. 55. 1. Maize Smut (Ustilago seae). Cells showing thread of mycelium passing from cell to cell; (a) thread shows throiigh; (b) section of cut sheath and thread. 2. Corn Smut, Spores in process of germination; each spore is sending out a tube with small lateral bodies. 3. The same, spores germinating in nutrient solution sprouting like yeast. From U. S. Dept. Agr. 4. Kernel Smut of Sorghum {Spkaceiolheca S.>rshi) on Sorghum.. P
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