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Teliospores Stock Photos and Images
RF2JC1A5W–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RM2PE7E2Y–Rose rust, Phragmidium mucronatum, pustules (urediospores) (teliospores) formed on the lower leaf surface of an ornamental rose tree in summer
RMEXH0N8–Rose rust , Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose
RF2JDCF14–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules urediniospores, teliospores formed on the lower leaf surface of an ornamental rose
RMBX102R–Close up of Hollyhock rust is caused by the fungus Puccinia malvacearum on the undersides of the leaves.
RF2CMT3DW–Pear leaves with pear rust infestation.Gymnosporangium sabinae infestation.(Pear rust, European pear rust,pear trellis rust).
RM2CARXA7–Hollyhock rust caused by fungus Puccinia heterospora or P.malvacearum lower leaves of broad leafed plant covered in disease rife hot humid conditions
RM2ANBYEB–A text-book of mycology and plant pathology . plied to the parasite. Such spores are bornein a sorus known as a telium. When these teliospores germinate, theyproduce a four-celled promycelium known as a basidium, and thisabstricts sporidia, or more properly basidiospores, which are minute,thin-walled spores without surface sculpturings. These are succeededby spermogonia (spermogonium), which are now called by most 187 I88 MYCOLOGY American mycologists, pycnia (pycnium), in which spermatia, orpycniospores, are formed. Pycnia indicate the nature of the life cycleand furnish positive characters f
RMF32CEX–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer, Berkshire, England, July
RF2JDWBK8–Disease of plant in the family Rosaceae. Damage to rose rust. Phragmidium tuberculatum. Sick of ornamental rose tree. Plant parasites. The concept of
RFJ8MFK1–An alien invasion? Mature Cedar Apple Rust displays gelatinous orange tendrils after a rainstorm in spring. Spores harmful to any nearby apple trees.
RMPG44YW–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 208 MYCOLOGY Belonging to the genus Gymnoconia (Fig. 92) is the orange rust of raspberry and blackberry which is found throughout the United States and Canada. It is also widely distributed in Europe and Asia. The genus Phragmidium, which is confined entirely to plants of the rose family, is autcecious. Warts are formed on the teliospores by the contraction of an outer gelatinous layer which with a rigid middle lamina and the arrangement of the germ pores distinguishes Phrag-. Fig. 78.—
RF2JC1A2A–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RMEXH0N7–Rose rust , Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose
RF2CMT3Y2–Pear leaves with pear rust infestation.Gymnosporangium sabinae infestation.(Pear rust, European pear rust,pear trellis rust).
RM2CARY8E–Hollyhock rust caused by fungus Puccinia heterospora or P.malvacearum lower leaves of broad leafed plant covered in disease rife hot humid conditions
RM2AKT89P–Apple rust . hese sori swell into large, finger-like projections. Eachcell of a teliospore may then send out a promycelium. Thispromycelium quickly divides into four cells, each of whichproduces a secondary spore or sporidium. (Plate I, figs. 4to 6.) As soon as the humidity decreases enough to causeappreciable evaporation the sporidia are forciblv dischargedas stated by Coons (1912, p. 230) *. The teliospores do not all germinate at once and sporidiamay be discharged several times during the season. They arereadily carried about by air currents and deposited on the *The forcible ejection of sp
RM2CET85J–Hollyhock rust caused by fungus Puccinia heterospora or P.malvacearum lower leaves of broad leafed plant covered in disease rife hot humid conditions
RF2JC1A68–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RF2PR0TM6–Disease of plant in the family Rosaceae. Damage to rose rust. Phragmidium tuberculatum. Sick of ornamental rose tree. Plant parasites. The concept of
RFJ8MFK7–An alien invasion? Mature Cedar Apple Rust displays gelatinous orange tendrils after a rainstorm in spring. Spores harmful to any nearby apple trees.
![. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 333 phologically inseparable as are also their secia when grown upon their common host. An excellent example of such biologic specialization is offered in the common pine Peridermium. iEcia may be produced upon the pine by sowing of Coleosporium teliospores from Senecio, Campanula, Pulsatilla, etc., but the seciospores which develop on the pine are capable of in- fecting only those species of hosts from which the teho- spores were taken. Similarly Eriksson "* has de- termined that though rus Stock Photo](https://c8.alamy.com/comp/PG4633/the-fungi-which-cause-plant-disease-plant-diseases-fungi-the-fungi-which-cause-plant-disease-333-phologically-inseparable-as-are-also-their-secia-when-grown-upon-their-common-host-an-excellent-example-of-such-biologic-specialization-is-offered-in-the-common-pine-peridermium-iecia-may-be-produced-upon-the-pine-by-sowing-of-coleosporium-teliospores-from-senecio-campanula-pulsatilla-etc-but-the-seciospores-which-develop-on-the-pine-are-capable-of-in-fecting-only-those-species-of-hosts-from-which-the-teho-spores-were-taken-similarly-eriksson-quot-has-de-termined-that-though-rus-PG4633.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 333 phologically inseparable as are also their secia when grown upon their common host. An excellent example of such biologic specialization is offered in the common pine Peridermium. iEcia may be produced upon the pine by sowing of Coleosporium teliospores from Senecio, Campanula, Pulsatilla, etc., but the seciospores which develop on the pine are capable of in- fecting only those species of hosts from which the teho- spores were taken. Similarly Eriksson "* has de- termined that though rus Stock Photo")
RMPG4633–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 333 phologically inseparable as are also their secia when grown upon their common host. An excellent example of such biologic specialization is offered in the common pine Peridermium. iEcia may be produced upon the pine by sowing of Coleosporium teliospores from Senecio, Campanula, Pulsatilla, etc., but the seciospores which develop on the pine are capable of in- fecting only those species of hosts from which the teho- spores were taken. Similarly Eriksson "* has de- termined that though rus
RF2CMT428–Pear leaves with pear rust infestation.Gymnosporangium sabinae infestation.(Pear rust, European pear rust,pear trellis rust).
RM2ANBHEC–A text-book of mycology and plant pathology . Fig. 77.—Longitudinal section of a partlygelatinous teliosorusafter the exten-sion of the tentacles. (After Reed, H. S., and Crabill, C. H., Techn. Bull. 9, Va.Agric. Exper. Slat., May, 1915.) 208 MYCOLOGY Belonging to the genus Gymnoconia (Fig. 92) is the orange rustof raspberry and blackberry which is found throughout the UnitedStates and Canada. It is also widely distributed in Europe and Asia. The genus Phragmidium, which is confined entirely to plants of therose family, is autoecious. Warts are formed on the teliospores by thecontraction of an
RM2CET84X–Hollyhock rust caused by fungus Puccinia heterospora or P.malvacearum lower leaves of broad leafed plant covered in disease rife hot humid conditions
RF2JC1A6H–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RMPG14G1–. Manual of tree diseases . Trees. 276 MANUAL OF TREE DISEASES rant or goosebeny bushes In order to continue the cycle of de- velopment. Spores are then produced throughout the summer on these plants which cause the infection of other goose- berries and currants. In the autumn another type of spores (teliospores) is developed on the affected currants and gooseberries and from these are formed basidiospores which cause the infection of the young branches of five-needled pines. The distribution of this fungus on the pines, therefore, is dependent on the presence or absence of gooseberries and cu
RF2CMT3RG–Pear leaves with pear rust infestation.Gymnosporangium sabinae infestation.(Pear rust, European pear rust,pear trellis rust).
RM2ANBTMG–A text-book of mycology and plant pathology . m occurs on the larch,Larix, and its urediniospores and teliospores on Populus deltoides, P.tremuloides and P. balsamifera. Calyptospora is a genus of rusts, thelife history of which has been investigated by Hartig, Kuhn andBubak. In July to September, the teliospores appear on the stems ofVaccinium vitis-idcea, where the stem becomes swollen and elongatedand at first of a pink color passing to brown. It occurs on other speciesof Vaccinium, including V. pennsylvanicum in the United States. Theaecia are found in Europe on leaves of Abies pectinata a
RM2CET7XP–Hollyhock rust caused by fungus Puccinia heterospora or P.malvacearum lower leaves of broad leafed plant covered in disease rife hot humid conditions
RF2JC1A1R–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RF2WR0FJR–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer.
RMPG44YK–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 209 CACE^) while the three-, four or five-celled teliospores are found on CuPRESSiNEiE (ChamcBcyparts, Cupressus, Juniperus, Libocedrus). One autcecious species is G. bermudianum which produces both its aecia and teliaon junipers (7. bermudianum). Kern gives thirty-two species as the number for North America and in vol. 7, North American Flora, part 3, pages 188-190, gives a useful key for the identification of the species. Gymnosporangium botryapites causes fusiform swelling
RM2ANBGYH–A text-book of mycology and plant pathology . with pustules. (After Jones andBartholomew, Bull. 257, Agric. Exper. Stat., Univ. Wise, July, 1915.) celled teliospores are formed. The aecia occur on two species of shadbush: Amelanchier canadensis and .4. intermedia (Fig. 73). In Gymnos porangium nidus-avis, the telia arise from a perennialmycelium which often dwarfs the young shoots and causes birds-nestdistortions in which usually there is a reversion of the leaves to thejuvenile form, sometimes causing gradual enlargements in isolatedareas on the larger branches of Juniperus virginiana with ae
RM2CET815–Hollyhock rust caused by fungus Puccinia heterospora or P.malvacearum lower leaves of broad leafed plant covered in disease rife hot humid conditions
RF2WR0FJW–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer.
RMPG461J–. The fungi which cause plant disease . Plant diseases; Fungi. FiQ. 259.—Triphragmium ulmaris, germi- nating teliospore. After Tulasne. Fig. 260.—Phragmi- dium bulbosum, teliospore germi- nating. After Tu- lasne. are in pulverulent sori, surrounded by clavate or capitate, hyaline paraphsrses. II. Urediniospores single. III. Teliospores separate, pedicellate, consisting of from three to ten superimposed cells, the uppermost of which has a single apical germ pore, the others about four each, placed laterally. The aecial stage is a Caeoma but with a border of incurved pa-. Please note that these
RF2MM8P4A–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RM2ANBKNR–A text-book of mycology and plant pathology . Fig. 73.—Roeslelia auranliaca on fruit oi Amelanchier intermedia correspondingto Gymnosporangium clavipes on red cedar. (Shelter Island, New York, July 16,1915-) Ash Rust, Puccinia fraxinata, on leaves and petioles of ash anduredinospores and teliospores on salt grass, Spartina Michauxiana. Asparagus Rust, Puccinia asparagi, develops all of its spore formson the cultivated asparagus. Violet Rust, Puccinia violcB, is parasitic on about forty-six different RUST FUNGI 205 species of violets in ^Asia, Europe, Norlhand South America. It isautcccious. ^^
RMPG451M–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 194 MYCOLOGY. Fig. 68.—Portion of a. teliosorus of cedar apple in February showing mycelia stroma and the binucleate condition of the cells of young teliospores. (After Reed. H S , and Crabill, C. H., Techn. Bull. 9, Va. Agric. Exper. Slat., May, 191S-) basidiospores teleutospore uredospore.. 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 resem
RF2MM8HKM–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RM2ANBH7K–A text-book of mycology and plant pathology . H. S., and Crabill,C. H., Techn. Bull. 9, Va. Agric. Exper. Stat., May, 191S) midium from neighboring genera. The teliospores are two- to several-celled by transverse septa. An important species is the Rust of Roses,Phragmidium subcorlicium, which has a spindle-shaped teliospore withsix to eight cells. Gymnosporangium is a genus of heteroecious rusts the aecia of whichoccur on Rosacea (except one on Hydrangeac^ and one on Myri- RUST FUNGI 209 CACE^) while the three-, four or five-celled teliospores are foundon CupRESSiNE^ (ChaftKecyparis, Cuprcssus
![. The fungi which cause plant disease . Plant diseases; Fungi. 324 THE FUNGI WHICH CAUSE PLANT DISEASE verrucosely sculptured, borne singly, or sometimes in chains, (5) teliospores, smooth or variously sculptured but not echinulate, borne singly or in chains. In every species the mycelium even- tually gives rise to teliospores, which produce in germination four basidia, either remaining within the spore-cell or borne in the air on a short promycelium, each basidium supporting a single, stalked or sessile basidiospore. The order of some two thousand species, constituting the "rust" fu Stock Photo](https://c8.alamy.com/comp/PG4649/the-fungi-which-cause-plant-disease-plant-diseases-fungi-324-the-fungi-which-cause-plant-disease-verrucosely-sculptured-borne-singly-or-sometimes-in-chains-5-teliospores-smooth-or-variously-sculptured-but-not-echinulate-borne-singly-or-in-chains-in-every-species-the-mycelium-even-tually-gives-rise-to-teliospores-which-produce-in-germination-four-basidia-either-remaining-within-the-spore-cell-or-borne-in-the-air-on-a-short-promycelium-each-basidium-supporting-a-single-stalked-or-sessile-basidiospore-the-order-of-some-two-thousand-species-constituting-the-quotrustquot-fu-PG4649.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. 324 THE FUNGI WHICH CAUSE PLANT DISEASE verrucosely sculptured, borne singly, or sometimes in chains, (5) teliospores, smooth or variously sculptured but not echinulate, borne singly or in chains. In every species the mycelium even- tually gives rise to teliospores, which produce in germination four basidia, either remaining within the spore-cell or borne in the air on a short promycelium, each basidium supporting a single, stalked or sessile basidiospore. The order of some two thousand species, constituting the "rust" fu Stock Photo")
RMPG4649–. The fungi which cause plant disease . Plant diseases; Fungi. 324 THE FUNGI WHICH CAUSE PLANT DISEASE verrucosely sculptured, borne singly, or sometimes in chains, (5) teliospores, smooth or variously sculptured but not echinulate, borne singly or in chains. In every species the mycelium even- tually gives rise to teliospores, which produce in germination four basidia, either remaining within the spore-cell or borne in the air on a short promycelium, each basidium supporting a single, stalked or sessile basidiospore. The order of some two thousand species, constituting the "rust" fu
RF2MM8P8X–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RM2ANBWHR–A text-book of mycology and plant pathology . Fig. 67.—Portion of a section of cedar apple about 5 mm. below a teliosorus.Note (i) Binucleate intercellular mycelium; (2) the haustoria in various stages ofdevelopment; (3) the doubling of nucleoli in the nuclei of some of the parenchymacells of the host. Material collected on March 31. {After Reed, H. S., and Crabill,C. H., Techn. Bull. 9, Va. Agric. Exper. Stat., May, 1915.) always before the formation of the teliospores. Whether theassociation of nuclei in the ordinary mycelium takes place by themigration of a nucleus from one cell to another,
RMPG4645–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 327 O. Pycnia or pycnial stage I. .Ecia or tecial stage II. Uredinia or uredinia stage III. Telia or telial stage The spores in all cases, except those of the basidiospores and. Fig. 241.—Amphispores, urediuiospores and teliospores of Puccinia vexans. After Holway. pycniospores arise by direct conversion of a mycelial cell into a spore, i. e., they are chlamydospores. Mesospore is a term applied to occasional unicellular forms of teliospores found in Puccinia and related genera which do not usual
RF2MM8HRD–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RM2ANBXE0–A text-book of mycology and plant pathology . Fig. 66.—a, Chain of young seciospores of Puccinia caricis; a, fusion tissue;b, basal (fusion) cell with conjugate nuclei; c, aeciospore mother-cell; d, intercalarycell; e, young aeciospore; B, germinating aeciospore of P. caricis; C, teliospore of P.caricis; D, formation of teliospores of P. falcaria {after Ditlschlag); E, developmentof aecium {after Blackman) of Phragmidium violaceiim; e, epidermal cell; s, sterilecell; below these cells a nucleus is seen migrating into the adjacent cell/; F and G,conjugation of two female cells to form basal cel
![. The fungi which cause plant disease . Plant diseases; Fungi. 350 THE FUNGI WHICH CAUSE PLANT DISEASE Chrysomyxa Unger (p. 341) III. Teliospores formed of a series of superimposed cells, of which the lower are sterile, ^â ^ ^ forming flat or slightly ele- vated, orange or reddish, waxy, crusts. Germina- tion of the teliospore by a promycelium from each cell, which produces mostly four basidiospores. C. abietis (Wal.) Ung. Fig. 254.âMelampsoropsis rhododendri, section Tolio crr Tf frirmc through telium. After De Baiy. ^^"^ °"'y- " ^"^^^ yellow spots on spruce leaves an Stock Photo](https://c8.alamy.com/comp/PG4628/the-fungi-which-cause-plant-disease-plant-diseases-fungi-350-the-fungi-which-cause-plant-disease-chrysomyxa-unger-p-341-iii-teliospores-formed-of-a-series-of-superimposed-cells-of-which-the-lower-are-sterile-forming-flat-or-slightly-ele-vated-orange-or-reddish-waxy-crusts-germina-tion-of-the-teliospore-by-a-promycelium-from-each-cell-which-produces-mostly-four-basidiospores-c-abietis-wal-ung-fig-254melampsoropsis-rhododendri-section-tolio-crr-tf-frirmc-through-telium-after-de-baiy-quot-quoty-quot-quot-yellow-spots-on-spruce-leaves-an-PG4628.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. 350 THE FUNGI WHICH CAUSE PLANT DISEASE Chrysomyxa Unger (p. 341) III. Teliospores formed of a series of superimposed cells, of which the lower are sterile, ^â ^ ^ forming flat or slightly ele- vated, orange or reddish, waxy, crusts. Germina- tion of the teliospore by a promycelium from each cell, which produces mostly four basidiospores. C. abietis (Wal.) Ung. Fig. 254.âMelampsoropsis rhododendri, section Tolio crr Tf frirmc through telium. After De Baiy. ^^"^ °"'y- " ^"^^^ yellow spots on spruce leaves an Stock Photo")
RMPG4628–. The fungi which cause plant disease . Plant diseases; Fungi. 350 THE FUNGI WHICH CAUSE PLANT DISEASE Chrysomyxa Unger (p. 341) III. Teliospores formed of a series of superimposed cells, of which the lower are sterile, ^â ^ ^ forming flat or slightly ele- vated, orange or reddish, waxy, crusts. Germina- tion of the teliospore by a promycelium from each cell, which produces mostly four basidiospores. C. abietis (Wal.) Ung. Fig. 254.âMelampsoropsis rhododendri, section Tolio crr Tf frirmc through telium. After De Baiy. ^^"^ °"'y- " ^"^^^ yellow spots on spruce leaves an
RF2MM8P5G–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RM2ANBW9M–A text-book of mycology and plant pathology . Pig. 68.—Portion of a teliosorus of cedar apple in February showing myceliastroma and the binucleate condition of the cells of young teliospores. (After Reed,H. S., and Crabill, C. H., Techn. Bull, g, Va. Agric. Exper. Stal.. May. 1915) teleutospore basidiospores uredospore. uredospore secidiospore^ intercalary cell^ „ . „•^ msion-cell spermatium} gamete ? gametes Fig. 69.—Diagram of the alternation of generations of a typical rust. (After Grove,W. B., The British Rust Fungi, 1913, 27.) RUST FUNGI 19s been known to germinate, and the large size of
RMPG44YA–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 211 teliospores appear on irregular spheric swellings or excrescence on Juniperus virginiana. The mycelium of G. juniperi-virginiance is annual, or biennial, producing globose swellings known as cedar apples on the leaves of the. Fig. 8i.—Magnified view of apple rust roestelia, or aecia. {After Jones and Bartholomew, Bull. 257, Agric. Exper. Stal. Univ. Wise, July, 1915.) red cedar, Juniperus virginiana. The cluster cups appear on the leaves of native species of apples {Malus
RF2MM8P99–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RMREF913–. Comparative morphology of Fungi. Fungi. Fig. 100.—Taphrina deformans. 1. Subcuticular, binucleate ascogenous hyphae before caryogamy. 2. Young chlamydospores. (After Dangeard, 1894.) Thus the chlamydospores may be interpreted as zeugites, organs in which at the close of the dicaryophase, caryogamy occurs. In this sense they would be considered homologous to the probasidia and sclerobasidia of the Auriculariales, to the teliospores of the Uredinales and the smut spores of the Ustilaginales, and thus the conceptions to be discussed under the Basidiomycetes, concerning the differentiation of ze
RMPG4603–. The fungi which cause plant disease . Plant diseases; Fungi. 378 THE FUNGI WHICH CAUSE PLANT DISEASE long covered by the epidermis. Spores broadly oval, often almost globose, slightly constricted, apex not thickened, thickly vemicose, brown, 26^8 x 30-35 ii. Pedicels short, colorless, deciduous. Mycelium localized. An opsis-type on cultivated Tragopogon. Urediniospores are unknown. The teliospores are often unicellular and are very variable. P. tarazaci Plow, is common on dandelion. P. cichorii Pass, is a hemi-type on Cichorium. P. isiacse on Phragmitis is thought to be. Fio. 274.—P. gramini
RF2MM8J0E–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RMRR1EY0–. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. Smutted wheat head Smutted wheat kernel full of teliospores. 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 work.. Montana. Dept. of Agriculture; Hinck, Laura; Johnson, Kim; Mullin, Barbara H; Montana. Agricultural Sciences Division. Helena, Mont. : Montana Department of Agriculture
RMPG462K–. The fungi which cause plant disease . Plant diseases; Fungi. 342 THE FUNGI WHICH CAUSE PLANT DISEASE Wall slightly colored 16. Cionothriz. Telia with a peridium Telia half projecting above the host surface. .• 17. Dietelia. Telia sunken in the tissue of the host 18. EndophyUum, p. 353. Teliospores 2-celled Peridium present 19. Pucciniosita. Peridium none 20. Didymopsora. Melampsora Castaigne (p. 340) 0. Pycnia half spherical. 1. .^cia of caeoma-type, no peridium or paraphyses. II. Urediniospores solitary, membrane colorless. III. Teliospores 1-celled, rarely more, in flat irregularly limited
RF2MM8HFW–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
![. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 333 phologically inseparable as are also their secia when grown upon their common host. An excellent example of such biologic specialization is offered in the common pine Peridermium. iEcia may be produced upon the pine by sowing of Coleosporium teliospores from Senecio, Campanula, Pulsatilla, etc., but the seciospores which develop on the pine are capable of in- fecting only those species of hosts from which the teho- spores were taken. Similarly Eriksson "* has de- termined that though rus Stock Photo](https://c8.alamy.com/comp/RDE63K/the-fungi-which-cause-plant-disease-plant-diseases-fungi-the-fungi-which-cause-plant-disease-333-phologically-inseparable-as-are-also-their-secia-when-grown-upon-their-common-host-an-excellent-example-of-such-biologic-specialization-is-offered-in-the-common-pine-peridermium-iecia-may-be-produced-upon-the-pine-by-sowing-of-coleosporium-teliospores-from-senecio-campanula-pulsatilla-etc-but-the-seciospores-which-develop-on-the-pine-are-capable-of-in-fecting-only-those-species-of-hosts-from-which-the-teho-spores-were-taken-similarly-eriksson-quot-has-de-termined-that-though-rus-RDE63K.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 333 phologically inseparable as are also their secia when grown upon their common host. An excellent example of such biologic specialization is offered in the common pine Peridermium. iEcia may be produced upon the pine by sowing of Coleosporium teliospores from Senecio, Campanula, Pulsatilla, etc., but the seciospores which develop on the pine are capable of in- fecting only those species of hosts from which the teho- spores were taken. Similarly Eriksson "* has de- termined that though rus Stock Photo")
RMRDE63K–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 333 phologically inseparable as are also their secia when grown upon their common host. An excellent example of such biologic specialization is offered in the common pine Peridermium. iEcia may be produced upon the pine by sowing of Coleosporium teliospores from Senecio, Campanula, Pulsatilla, etc., but the seciospores which develop on the pine are capable of in- fecting only those species of hosts from which the teho- spores were taken. Similarly Eriksson "* has de- termined that though rus
RMPG460R–. The fungi which cause plant disease . Plant diseases; Fungi. 366 THE FUNGI WHICH CAUSE PLANT DISEASE III. Telia caulicolous, appearing on long fusiform swellings of various sized branches, numerous, scattered, or sometimes aggre- gated, cylindric, or slightly compressed, 5-10 mm. long by 0.8-1.5 mm. in diameter, acutish, or sometimes forked at the apex, brownish-yellow; teliospores 2-celled, lanceolate, 13-20 x 40-80 /x, occasionally longer, rounded or narrowed above, usually narrowed below, very slightly or not at all constricted at the septum, wall golden-yellow, thin, about 1 ju; pores 2
RF2MM8HG1–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RF2JC1A6W–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum and whitefly pupa on the underside of a rose leaf in the garden.
RMRDFDX9–. Manual of tree diseases . Trees. 276 MANUAL OF TREE DISEASES rant or goosebeny bushes In order to continue the cycle of de- velopment. Spores are then produced throughout the summer on these plants which cause the infection of other goose- berries and currants. In the autumn another type of spores (teliospores) is developed on the affected currants and gooseberries and from these are formed basidiospores which cause the infection of the young branches of five-needled pines. The distribution of this fungus on the pines, therefore, is dependent on the presence or absence of gooseberries and cu
RMPG3N77–. Manual of fruit diseases . Fruit. 346 MANUAL OF FRUIT DISEASES. Fig. 96. — Pacific Coast rust on pear-fruit. times witches'- brooms are formed; these may attain a diameter of two feet. Cause. The Pacific Coast rust fungus may properly be called Gymno sporangium Lihocedri. Sporidia developed from teliospores on the incense cedar are blown for a considerable distance to the pear and other pomaceous fruits, where they cause infection. Within a few days after the pear is inocu- lated by sporidia, spots become visi- ble on the affected organ as a result of infection. Within a month or less after
RMRE5G0D–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. 383 of the fungus Melampsora euphorbiae Cast, determined by the habitat of the host plant (Saratov, Odessa, Tambov, and Moscow regions). In some cases the fungi collected from a single host may be referred — according to the size of teliospores and other morphological features — to almost any species of Melsmipsora on Euphorbia. Miiller, Klebahn, Jacky, and others concluded that the biological specialization does not justify the establishment of independent species. The morphological differences mentioned, in conjunctio
RMPG450J–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 204 MYCOLOGY Dandelion Rust, Puccinia iaraxaci, on the dandelion Taraxacum officinale, rather common in Europe, North America, Japan and the East Indies. Reed Grass Rust, Puccinia phragmitis, with aecia on Rumex crispus, R. obtusifolius and urediniospores and teliospores on reed grass Phrag- mites communis.. Fig. 73.—Roeslclia auranliaca on fruit oi Amelanchicr intermedia corresponding to Gymnosporangium clavipes on red cedar. (Shelter Island, New York, July 16, 19.15) Ash Rust, Puccini
RMRE58RX–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. 48 the basidiospores from the germinating teliospores infect pine leaves, on which aecia are produced in the following spring. In all these fungi, in addition to those producing either several generations per year, or one (as in Gymnosporangium, Coleosporium, Cronartium, Milesia, Hyalopsora, Melampsorella), or two (as in Chrysomyxa), the hosts are represented by evergreen plants, while in Micro-Uredinales with one generation of teliospores the mycelium overwinters in the evergreen leaves or overwintering buds. In some r
RMPG4517–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 200 MYCOLOGY slit. The teliospores consist of four superimposed cells. There is a North American species of this family, Gallowaya pint (formerly Coleo- sporium pini), which has teliospores only and these on the leaves of Pinus inops, i.e., on trees of the same order on which Colesporium has. Fig. yo.—A-D, Uromyces pisi. A. Ascidia on deformed leaves of Euphorbia cypanssms; B, ascidia enlarged; C, teliosori on leaves of Pisum sativum; teliosori enlarged; £ and F, Uromyces trifolii on Tr
RMRE1N8B–. College botany; structure, physiology and economics of plants. Botany. 284 COLLEGE BOTANY Puccinia graminis. The mycelium lives within the host, coming to the surface for the production of two kinds of spores. The urediniospores (or uredospores) or summer spores are borne singiy and are unicellular. They germinate readily and cause new infections. The teliospores (or teleutospores) or winter spores are borne singly and are two-celled. They germinate the. Fig. 134.—Apple rust following spring, producing a promycelium which bears sporidia in groups of four. The sporidia correspond to the spore
RMPG451H–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. Fig. 68.—Portion of a. teliosorus of cedar apple in February showing mycelia stroma and the binucleate condition of the cells of young teliospores. (After Reed. H S , and Crabill, C. H., Techn. Bull. 9, Va. Agric. Exper. Slat., May, 191S-) basidiospores teleutospore uredospore.. uredospore secidiospore intercalary cell spermatium s gamete ¥ gametes fusion-cell Fig. 69.—Diagram of the alternation of generations of a typical rust. (After Grove, W. B., The British Rust Fungi, 1913, 27.). P
RMRDE2AK–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 208 MYCOLOGY Belonging to the genus Gymnoconia (Fig. 92) is the orange rust of raspberry and blackberry which is found throughout the United States and Canada. It is also widely distributed in Europe and Asia. The genus Phragmidium, which is confined entirely to plants of the rose family, is autcecious. Warts are formed on the teliospores by the contraction of an outer gelatinous layer which with a rigid middle lamina and the arrangement of the germ pores distinguishes Phrag-. Fig. 78.—
RMPG3N6N–. Manual of fruit diseases . Fruit. Fig. 96. — Pacific Coast rust on pear-fruit. times witches'- brooms are formed; these may attain a diameter of two feet. Cause. The Pacific Coast rust fungus may properly be called Gymno sporangium Lihocedri. Sporidia developed from teliospores on the incense cedar are blown for a considerable distance to the pear and other pomaceous fruits, where they cause infection. Within a few days after the pear is inocu- lated by sporidia, spots become visi- ble on the affected organ as a result of infection. Within a month or less after inocu- lation mature secia are
RMREF65A–. Comparative morphology of Fungi. Fungi. 548 COMPARATIVE MORPHOLOGY OF FUNGI basidia are formed in the uppermost portion of the crust from pyriform to spherical probasidia, which are either terminal on the ends of hyphae or irregularly borne on lateral branches of more or less coiled hyphae. In S. frustulosum, the probasidium becomes septate and functions as a basidium, as do the teliospores of the Coleosporiaceae in the next order (Burt, 1916). In S. pinicola on Pinus Strobus and P. monticola, the probasidia are apparently at the same stage of development as in Iola, since the walls are not
RMPG461P–. The fungi which cause plant disease . Plant diseases; Fungi. 358 THE FUNGI WHICH CAUSE PLANT DISEASE Triphragmium Link (p. 354) Teliospores 3-celled, one basal, two apical, each cell vnth one or more germ tubes. T. ulmarise Schm. occurs on Ulmaria in England and at one station in America. Phragmidium Link (p. 354) 0. Pycnia present. 1. iEciospores in basipetal chains. The first two spore forms. 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
RMREF5RR–. Comparative morphology of Fungi. Fungi. UREDINALES 577 the membrane of the spore stipe changes into a substance capable of swelling in damp weather, leading, especially in Gymnosporangium, to a gelatinization of the telium. The mature spores are capable of immediate germination, and in Gymnosporangium are thin walled in the interior of the sorus. In Gymnoconia, Triphragmium and Kuehneola, the teliospores have developed in a special direction. In Gymnoconia (Fig. 389, 4 and 5) the apical cell divides, as in Puccinia, into two superimposed daughter cells. Their germ pores are much distended an
RMPG4520–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. Fig. 66.—A, Chain of young asciospores of Puccinia caricis; a, fusion tissue; b, basal (fusion) cell with conjugate nuclei; t, seciospore mother-cell; d, intercalary cell; e, young seciospore; B, germinating aeciospore of P. caricis; C, teliospore of P. caricis; D, formation of teliospores of P. falcarice (after Ditlscklag); E, development of aecium (after Blackman) of Phragmidium violaceum; e, epidermal cell; i, sterile cell; below these cells a nucleus is seen migrating into the adjac
RMRE58NK–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. Aecia probably on species of Abies. Uredio- and teliospores on Polystichiim aculeatum (L.)Roth in Yugoslavia (Dalmatia), England, and France. This species is differentiated from the preceding two by the echinulate urediospores. In the western states of North America on Polystichum munitum (Kaulf.) Presl is found M. polystichi Wineland with thick-v/alled urediospores while peridial cells and urediospores are more intensively echinulate. General distribution: western Europe, USSR (Caucasus). Polystichum aciileatum (L.) Ro
RMPG460K–. The fungi which cause plant disease . Plant diseases; Fungi. 372 THE FUNGI WHICH CAUSE PLANT DISEASE MilMlium. Leaf Dssue 17-32 X 14-20 II. II. Urediniospores pale-brown, aculeolate, 24-33 X 16-20 II. III. Teliospores elliptical or subglobose, smooth, dark-brown, apex much thick- ened, with a small, hyaline, wart- like papilla, 2&-35 x 20-26 ii. An autoecious eu-type. On Phaseolus, Dolichos and other related legumes. The sori usually appear late in the season on leaves, rarely on stems and pods. The myceliiun is local. Great difference in varietal susceptibility is noted. U. pisi (Pers.)
RMRGN5C8–. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. 42 MASS. EXPERIMENT STATION BULLETIN 202. PLATE II.. Fig. 1. — Cross section of telium and leaf. Fig. 2. — Teliospores. Fig. 3. — Germinating urediniospore on leaf. Fig. 4. — Haustoria and intercellular mycelium. Fig. 5. — Cross section of uredinium and leaf.. 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 work.. Massachusetts Agricultural Experiment Station
![. The fungi which cause plant disease . Plant diseases; Fungi. Leaf Dssue 17-32 X 14-20 II. II. Urediniospores pale-brown, aculeolate, 24-33 X 16-20 II. III. Teliospores elliptical or subglobose, smooth, dark-brown, apex much thick- ened, with a small, hyaline, wart- like papilla, 2&-35 x 20-26 ii. An autoecious eu-type. On Phaseolus, Dolichos and other related legumes. The sori usually appear late in the season on leaves, rarely on stems and pods. The myceliiun is local. Great difference in varietal susceptibility is noted. U. pisi (Pers.) de B." I. (=^cidium cyparissiae). Fig. 267.— Stock Photo](https://c8.alamy.com/comp/PG460H/the-fungi-which-cause-plant-disease-plant-diseases-fungi-leaf-dssue-17-32-x-14-20-ii-ii-urediniospores-pale-brown-aculeolate-24-33-x-16-20-ii-iii-teliospores-elliptical-or-subglobose-smooth-dark-brown-apex-much-thick-ened-with-a-small-hyaline-wart-like-papilla-2amp-35-x-20-26-ii-an-autoecious-eu-type-on-phaseolus-dolichos-and-other-related-legumes-the-sori-usually-appear-late-in-the-season-on-leaves-rarely-on-stems-and-pods-the-myceliiun-is-local-great-difference-in-varietal-susceptibility-is-noted-u-pisi-pers-de-bquot-i-=cidium-cyparissiae-fig-267-PG460H.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. Leaf Dssue 17-32 X 14-20 II. II. Urediniospores pale-brown, aculeolate, 24-33 X 16-20 II. III. Teliospores elliptical or subglobose, smooth, dark-brown, apex much thick- ened, with a small, hyaline, wart- like papilla, 2&-35 x 20-26 ii. An autoecious eu-type. On Phaseolus, Dolichos and other related legumes. The sori usually appear late in the season on leaves, rarely on stems and pods. The myceliiun is local. Great difference in varietal susceptibility is noted. U. pisi (Pers.) de B." I. (=^cidium cyparissiae). Fig. 267.— Stock Photo")
RMPG460H–. The fungi which cause plant disease . Plant diseases; Fungi. Leaf Dssue 17-32 X 14-20 II. II. Urediniospores pale-brown, aculeolate, 24-33 X 16-20 II. III. Teliospores elliptical or subglobose, smooth, dark-brown, apex much thick- ened, with a small, hyaline, wart- like papilla, 2&-35 x 20-26 ii. An autoecious eu-type. On Phaseolus, Dolichos and other related legumes. The sori usually appear late in the season on leaves, rarely on stems and pods. The myceliiun is local. Great difference in varietal susceptibility is noted. U. pisi (Pers.) de B." I. (=^cidium cyparissiae). Fig. 267.—
RMREF5WB–. Comparative morphology of Fungi. Fungi. UREDINALES 573 tinguish them. The initial cells change entirely into teliospores instead of dividing into spores and intercalary cells. They remain connected with one another and, by the increase of new cells on the lower side, form a lengthening column which finally ruptures the peridium and passes out through the epidermis (Fig. 384, 1). The teliospores are thin-walled, apically thickened and capable of immediate germination at maturity (Fig. 384, 2 to 7).. Fig. 384.—Cronaritium ribicola. Short column of teliospores with teliospores already germinate
RMRE58T2–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. to Melampsoraceae; but the aecial structure indicates their kinship with Pucciniaceae. In Pucciniastreae (Figure 4, a —d) of the family Melampsoraceae the unicellular teliospores divide longitudinally into two, 46 four, or more cells; they are either subepidermal or intraepidermal. In the genus Cronartium (Figure 4, g) unicellular teliospores are fused into a column emerging above the surface. In the genus Chrysomyxa (Figure 4, f) unicellular teliospores rise in vertical chains, together forming waxy red sori. In Melamp
RMRGKJRE–. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 42 MASS. EXPERIMENT STATION BULLETIN 202. PLATE II.. Fig. 1. —• Cross section of telium and leaf. Fig. 2. — Teliospores. Fig. 3. — Germinating urediniospore on leaf. Fig. 4. — Haustoria and intercellular mycelium. Fig. 5. — Cross section of uredinium and leaf.. 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 work.. Massachusetts Agricultural
RMRDWC4G–. The essentials of botany. Botany. ASCOSPOREAE 213 C. Spore fruits much reduced, containing teliospores. Class Teliospobeae. D. Asci, basidia or teliospores unknown (artificial group). Fungi Impeefecti. Class 14. ASCOSPOREAE. The Ascus Fungi. 333. This large class includes chlorophyll-less plants which differ much in size and appearance, but which agree in producing their fruit-spores (carpo- spores) in sacs (asci), and because they are in sacs they are called sac-spores or ascospores. These spore-bearing sacs (singular, ascus; plural, asci) are end- cells in the sporogenous tissue of the fru
RMRE5FYN–. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. Telia lenticular, starting under the epidermis, soon erumpent and sprouting, acquiring an ash-gray color. Teliospores single-celled, cylindroid, in one layer, colorless, with thin, smooth walls. Distinguished from Melampsora by the colorless teliospores and by germination immediately upon maturation; very close to Melampsora, Chnoopsora, and Melampsoridium. Two species are known, one in North America, the other in the USSR and China. On Lonicera (Caprifoliaceae) 1. Aplospora lonicerae Tranz., Tranzschel, Consp. Ured. UR
RMRDWFRH–. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 257 spring, variously shaped masses of hyphae bearing numerous teliospores radiate out from these galls and in the early spring rains these strands swell up, forming conspicuous yellow, jelly- like masses. The basidiospores are developed in the jelly and infest the leaves of the apple, thorn, shadbush, etc. In some of the genera of rusts all the stages appear upon the same plant as in the May apple and jack-in-the-pulpit. In the early spring. Fig. 165. A rust, Gymnosporangium, that infests the juniper and mem- bers of the apple
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