Seyed Akbar Khodaparast
University of Guilan, Plant Protection, Faculty Member
- I am a Mycologist and Plant pathologistedit
In this study, we report some Ascomycete genera from Nectriaceae, Botryosphaeriaceae, Cryphonectriaceae and Hypocreaceae families from Guilan province, Iran. Cultural and morphological characteristics and sequence information of rDNA ITS... more
In this study, we report some Ascomycete genera from Nectriaceae, Botryosphaeriaceae, Cryphonectriaceae and Hypocreaceae families from Guilan province, Iran. Cultural and morphological characteristics and sequence information of rDNA ITS and translation elongation factor 1-α encoding gene (tef1) were used for identification. Among isolates studied in this research, six species viz. Microthia havanensis, Lasiodiplodia hormozganensis, Lasiodiplodia parva, Thyronectria austroamericana, Trichoderma cf. chromospermum and Trichoderma cf. longibrachiatum are reported as new or less known species for the region. As a result, two genera viz. Thyronectria (Nectriaceae) and Microthia (Cryphonectriaceae) and two species (Lasiodiplodia parva and Trichoderma cf. chromospermum)are new reports for Iran mycobiota.
Research Interests:
During a study several species of mitosporic fungi which have been collected from Guilan Province were examined and seven species viz.: Hansfordia pulvinata, Myriellina cydoniae, Phloeospora cf. ulmi, Questieriella sp., Sarcinella... more
During a study several species of mitosporic fungi which have been collected from Guilan Province were examined and seven species viz.: Hansfordia pulvinata, Myriellina cydoniae, Phloeospora cf. ulmi, Questieriella sp., Sarcinella questieri, Septoria cf. castaneicola and Sirosporium ...
Research Interests:
Research Interests: Biology and Ascomycota
Research Interests:
During the study on boxwood blight from 2016 to 2017, some isolates of Pseudonectria were isolated from boxwood leaves and branches. Fungi were isolated and purified using conventional methods. According to the morphological... more
During the study on boxwood blight from 2016 to 2017, some isolates of Pseudonectria were isolated from boxwood leaves and branches. Fungi were isolated and purified using conventional methods. According to the morphological characteristics and ITS rDNA sequences, two species of Pseudonectria viz. P. buxi and P. foliicola were identified. Moreover, the pathogenicity of these two species under laboratory and greenhouse conditions was examined. None of the species were able to produce disease on the healthy plant leaves, and leaf wounds were necessary to establish the infection. According to our knowledge, this is the first report of Pseudonectria species on boxwood from Iran.
Research Interests:
Nine Dictyuchus isolates were obtained from floating and decaying twigs and leaves in Anzali lagoon, Anzali County, Guilan province, Iran. They are interestingly distinguished from current Dictyuchus species by the presence of dictyoid... more
Nine Dictyuchus isolates were obtained from floating and decaying twigs and leaves in Anzali lagoon, Anzali County, Guilan province, Iran. They are interestingly distinguished from current Dictyuchus species by the presence of dictyoid and achlyoid type of zoospore discharge, abundant fusiform and spherical gemma, and the absence of any sexual apparatus. In addition, phylogenetic analyses of the internal transcribed spacer (ITS) region of the nuclear rDNA and cytochrome c oxidase subunit I (cox1) gene sequences using Maximum likelihood method indicate its novelty. We preferred not to introduce the isolates as new species due to low number of and sometimes unreliable sequences and lack of type species and suggested to verify Dictyuchus sterilis which has been excluded before. We discussed about taxonomy of the genus in details and provided a revised key to the species. In addition, it was shown that sterility in vitro might be common in this genus.
Research Interests:
Research Interests:
Sooty mold fungi are often associated with honeydew which insects secrete while feeding on the plant. A great variety of these fungi occur in the North of Iran, especially on Citrus ssp which is one of the most widely cultivated fruit... more
Sooty mold fungi are often associated with honeydew which insects secrete while feeding on the plant. A great variety of these fungi occur in the North of Iran, especially on Citrus ssp which is one of the most widely cultivated fruit trees in this region. During last 10 years, several collections of these fungi examined and 15 species have been recorded. In this paper seven previously unreported species are treated and described for the first time from Iran. The treated species include Catenuloxyphium heterosporum (on Salix aegiptiaca and Alnus glutinosa); Echinothecium sp. (on Eriobotrya japonica and Passiflora sp.); cf. Denisiella sp. (On Citrus sinensis and Malus pumila); Fumagospora capnodioides (on Alnus glutinosa, Populus deltoids, Salix aegyptiaca and Zelkova carpinifolia); Leptoxyphium fumago (on Alnus glutinosa, Rubus sp. and Phytolacca americana); Tripospermum juglandis (on Ligustrum sp.) and Scorias spongiosa (on Citrus sinensis).
Research Interests:
Contributions of fungal and oomycete communities to freshwater carbon cycling have received increasing attention in the past years. It has been shown that fungi and oomycetes constitute key players in the organic matter cycling of... more
Contributions of fungal and oomycete communities to freshwater carbon cycling have received increasing attention in the past years. It has been shown that fungi and oomycetes constitute key players in the organic matter cycling of freshwater ecosystems. Therefore, studying their interactions with dissolved organic matter is crucial for understanding the aquatic carbon cycle. Therefore, we studied the consumption rates of various carbon sources using 17 fungal and 8 oomycete strains recovered from various freshwater ecosystems using EcoPlate™ and FF MicroPlate™ approaches. Furthermore, phylogenetic relationships between strains were determined via single and multigene phylogenetic analyses of the internal transcribed spacer regions. Our results indicated that the studied fungal and oomycete strains could be distinguished based on their carbon utilization patterns, as indicated by their phylogenetic distance. Thereby, some carbon sources had a higher discriminative strength to categor...
Research Interests:
Research Interests:
Arthrocladiella is a monotypic member of family Erysiphaceae (Ascomycota, Helotiales), which has only been reported from Lycium spp. (Solanaceae). Morphological data supplemented with rDNA ITS sequence confirmed that the Arthrocladiella... more
Arthrocladiella is a monotypic member of family Erysiphaceae (Ascomycota, Helotiales), which has only been reported from Lycium spp. (Solanaceae). Morphological data supplemented with rDNA ITS sequence confirmed that the Arthrocladiella mougeotii infects Lycium sp. in Iran. Moreover, Arthrocladiella is reported as a new genus for Iranian Mycobiota.
Research Interests:
Athelia rolfsii is a globally dispersed pathogenic fungus, causing white root rot disease in many crops and horticultural plants. In this study, 90 isolates were collected from three provinces of Guilan, Mazandaran and Golestan in... more
Athelia rolfsii is a globally dispersed pathogenic fungus, causing white root rot disease in many crops and horticultural plants. In this study, 90 isolates were collected from three provinces of Guilan, Mazandaran and Golestan in northern Iran. Eighteen isolates were selected for sequence analyses based on their host, sampling sites and Mycelial Compatibility Groups (MCG). Translation elongation factor 1-α(tef1-α), β-tubulin (tub2) genes and rDNA large subunit (LSU) were partially amplified and sequenced in order to conduct phylogenetic analyses. Approximately, all Iranian isolates clustered together in both tef1-α and LSU phylogenetic trees. However, after deletion of ambiguous sites, no variations were observed in tub2 sequences. ISSR and SCoT were also used to investigate the genetic structure of the population. Results of the molecular variance analysis (AMOVA) showed that 70 and 30% of the observed variance corresponded to the difference between and within the populations, res...
Research Interests:
هیفومیستهای آبزی تولیدکننده تعدادی زیادی آنزیمهای خارج سلولی هستند که در تجزیه زیستی آلودگیهای ناشی از فعالیتهای انسانی، پلاستیک، ترکیبات آروماتیک و هیدروکربنهای نفتی نقش دارند. مطالعه حاضر با هدف افزایش دانش ما از هیفومیستهای آبزی... more
هیفومیستهای آبزی تولیدکننده تعدادی زیادی آنزیمهای خارج سلولی هستند که در تجزیه زیستی آلودگیهای ناشی از فعالیتهای انسانی، پلاستیک، ترکیبات آروماتیک و هیدروکربنهای نفتی نقش دارند. مطالعه حاضر با هدف افزایش دانش ما از هیفومیستهای آبزی در ایران صورت گرفت. نمونهبرداری طی سال 1396 از تالاب انزلی در استان گیلان انجام گرفت. از میان 55 جدایه قارچی که در این مطالعه به دست آمد، تعداد هشت گونه شامل <em>Arthrobotrys oligosporus</em>، <em>Ceratorhiza hydrophila</em>، <em>Fusarium </em>cf. <em>ensiforme</em>، <em>F. incarnatum </em>species complex، <em>Myrmecridium schulzeri</em>،<em>Paecilomyces variotii</em>، <em>Sarocladium subulatum</em> و <em>Volutella citrinella</em> برمبنای خصوصیات ریختشناختی شناسایی شدند. علاوه براین، سه گونه متعلق به جنسهای <em>Arthrobotrys </em>، <em>Fusarium </em> و<em>Sarocladium </em> ناشناخته باقی ماندند. شناسایی مو...
Research Interests:
Summary Stem rot caused by Athelia rolfsii (syn. Sclerotium rolfsii), is an important disease of peanut in Iran. Soil samples were collected from 15 peanut fields before the 2014 growing season in Guilan province, Iran and the viable... more
Summary Stem rot caused by Athelia rolfsii (syn. Sclerotium rolfsii), is an important disease of peanut in Iran. Soil samples were collected from 15 peanut fields before the 2014 growing season in Guilan province, Iran and the viable sclerotia were counted using the soil-tray technique. The 15 selected fields were also evaluated for disease incidence at three intervals during the growing seasons of 2013 and 2014. The disease incidence at the end of the growing season ranged from 0 to 29.3% and from 0 to 45% in 2013 and 2014, respectively, depending on the field. The disease progress model, which was introduced for each field based on the disease incidence, showed good fitness with the monomolecular model in both years, but especially in 2014. Disease severity was evaluated in three out of the 15 peanut fields at three intervals during the growing season of 2014. The monomolecular model could describe more than 88% of the data. There was a significant linear relationship between the ...
Research Interests:
In the framework of study on wood inhabiting Hyphomycetes inChalus vicinity, Mazandaran (Iran), during 2005-2006, 21 taxa belonging to different genera were identified. Among them, nine taxa have already been recorded from Iran and the... more
In the framework of study on wood inhabiting Hyphomycetes inChalus vicinity, Mazandaran (Iran), during 2005-2006, 21 taxa belonging to different genera were identified. Among them, nine taxa have already been recorded from Iran and the other taxa are new to Iran which are listed as follows: Arthrobotryum stilboideum, Chloridium preussi, C. virescens var. virescens, Codinaeopsis gonytrichoides, Dactylaria purpurella, Geniculosporium state of Hypoxylon serpens, Oncopodiella trigonella, Pleurothecium recurvatum, Pseudospiropes hachijoensis, Sporidesmium folliculatum, Taeniolella subsessilis and Zygosporium gibbum.
Research Interests:
This study was carried out to determine species composition of sooty mold fungi on Citrus species in Gilan Province, which is located in the North of Iran. This region isolated by Alborz mountain range from other parts of the country with... more
This study was carried out to determine species composition of sooty mold fungi on Citrus species in Gilan Province, which is located in the North of Iran. This region isolated by Alborz mountain range from other parts of the country with maximum rainfall about 2000 mm/year. A total of seven species belonging to various genera of mitosporic fungi viz., Conidiocarpous penzigii, C. cf. caucasicus, Chaetasbolisia microglobulosa, Leptoxyphium sp., Polychaeton artocarpi, Polychaeton sp. and Tripospermum roupalae were identified. Moreover, two ascomyctes species including Aithaloderma ferrugineum and Trichomerium grandisporum are also recorded as causal agent of sooty mold on Citrus plant in this region. Polychaeton artocarpi is proposed as a new combination. According to literatures, all above-mentioned taxa, are new to Iran mycoflora.
Research Interests:
This study was carried out to contribute to the knowledge of biodiversity of xylariaceous fungi from North of Iran. Plant materials with fruiting bodies of xylariaceous fungi were collected and examined. Eight species viz .... more
This study was carried out to contribute to the knowledge of biodiversity of xylariaceous fungi from North of Iran. Plant materials with fruiting bodies of xylariaceous fungi were collected and examined. Eight species viz . Annulohypoxylon nitens , Biscogniauxia anceps , B. capnodes var. rumpens , B. mediterranea , B. plana , Hypoxylon flavoargillaceum , Jumillera cinerea , and Nemania illita were identified. All these except B. mediterranea are new to the Iranian mycobiota. A dichotomous identification key for all the xylariaceous fungi examined by the authors from North of Iran is presented.
Research Interests:
Research Interests:
Hypoxylon, a large, cosmopolitan genus of Ascomycota is in the focus of our current poly-thetic taxonomic studies, and served as an excellent source for bioactive secondary metabolites at the same time. The present work concerns a survey... more
Hypoxylon, a large, cosmopolitan genus of Ascomycota is in the focus of our current poly-thetic taxonomic studies, and served as an excellent source for bioactive secondary metabolites at the same time. The present work concerns a survey of the Hypoxylon fuscum species complex based on specimens from Iran and Europe by morphological studies and high performance liquid chromatography coupled to mass spectrometry and diode array detection (HPLC-MS-DAD). Apart from known chemotaxonomic markers like binaphthalene tetrol (BNT) and daldinin F, two unprece-dented molecules were detected and subsequently isolated to purity by semi preparative HPLC. Their structures were established by nuclear-magnetic resonance (NMR) spectroscopy as 3′-malonyl-daldinin F (6) and pseudofuscochalasin A (4). The new daldinin derivative 6 showed weak cytotoxicity towards mammalian cells but bactericidal activity. The new cytochalasin 4 was compared to cytochalasin C in an actin disruption assay using fluorescen...
Research Interests:
Research Interests:
During a survey of xylarialean fungi in Northern Iran, several specimens that showed affinities to the Hypoxylon rubiginosum complex were collected and cultured. A comparison of their morphological characters, combined with a... more
During a survey of xylarialean fungi in Northern Iran, several specimens that showed affinities to the Hypoxylon rubiginosum complex were collected and cultured. A comparison of their morphological characters, combined with a chemotaxonomic study based on high performance liquid chromatography, coupled with diode array detection and mass spectrometry (HPLC-DAD/MS) and a multi-locus phylogeny based on ITS, LSU, rbp2 and tub2 DNA sequences, revealed a new species here described as Hypoxylon guilanense. In addition, Hypoxylon rubiginosumsensu stricto was also encountered. Concurrently, an endophytic isolate of the latter species showed strong antagonistic activities against the Ash Dieback pathogen, Hymenoscyphus fraxineus, in a dual culture assay in our laboratory. Therefore, we decided to test the new Iranian fungi for antagonistic activities against the pathogen, along with several cultures of other Hypoxylon species that are related to H. rubiginosum. Our results suggest that the a...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Summary Sclerotium rolfsii is a soil borne pathogen responsible for root and stem rot on a wide range of crops. This study was conducted to identify the virulence of different S. rolfsii isolates on a susceptible local peanut germplasm... more
Summary Sclerotium rolfsii is a soil borne pathogen responsible for root and stem rot on a wide range of crops. This study was conducted to identify the virulence of different S. rolfsii isolates on a susceptible local peanut germplasm and determine the resistance of 20 peanut genotypes to the most virulent isolate and also the relationship between virulence and mycelial compatibility groups (MCGs). Seventy eight isolates of this fungus from 10 host plants and six known MCGs were used in the experiment. The experiment was done in greenhouse conditions (25±5°C) using a complete randomized block design with three replications. Pots containing sterile soil (pH=6.7) were inoculated with barley seeds colonized by each isolate separately before being seeded with the peanut germplasm. Disease severity was assessed by scoring the wilting, yellowing or death of plants, mycelia or sclerotia production on the soil surface or on plant stem, stem area affected (%) and stem lesion length, at the ...
Research Interests:
Colletotrichum species are associated with citrus plants as pathogens, saprobes and endophytes. According to the most recent multigene phylogenetic analysis, a lot of changes were happened in the taxonomy and species delimitation in the... more
Colletotrichum species are associated with citrus plants as pathogens, saprobes and endophytes. According to the most recent multigene phylogenetic analysis, a lot of changes were happened in the taxonomy and species delimitation in the genus Colletotrichum. In this investigation, 292 Colletotrichum isolates were obtained from leaves, fruits and stems of Citrus species at Golestan, Mazandaran, Guilan and Kerman provinces. After morphological studies, a multilocus molecular phylogenetic analysis (TUB2, CHS–1, CAL) of 13 isolates were carried out. Based on the morphological and molecular data, five species including C. gloeosporioides s. s., C. fructicola and C. siamense (from C. gloeosporioides s. l.); C. karstii and C. novae zelandiae(from C. boninense s. l.) were identified. According to our knowledge, this is the first report of C. novae–zelandiae from Iran and C. siamense and C. karstii from citrus plants in the country.
Research Interests:
During a survey of aquatic fungi from Anzali Lagoon in Iran, several fungal specimens were isolated from freshwater habitats. Morphological evidence and comparing sequencing based on rDNA (ITS and LSU) and protein-coding genes (TEF1 and... more
During a survey of aquatic fungi from Anzali Lagoon in Iran, several fungal specimens were isolated from freshwater habitats. Morphological evidence and comparing sequencing based on rDNA (ITS and LSU) and protein-coding genes (TEF1 and TUB2) showed that some isolates belong to undescribed fungal species. These isolates belong to Arthrobotrys and Sarocladium, two ascomycetes genera. Arthrobotrys hyrcanus, sp. nov., differs from closely related species such as A. dianchiensis by its larger conidia and septation of primary conidia. Sarocladium pseudokiliense, sp. nov., was similar to S. kiliense, but distinguished by its conidial shape and the absence of adelophialides and chlamydospores. Morphological descriptions, illustrations and multilocus phylogenetic analysis for both new species are provided.
Research Interests:
Research Interests:
Recently performed phylogenetic-taxonomic analyses of species belonging to Erysiphe sect. Uncinula on willows (Salix spp.) demonstrated a much higher diversity than previously assumed. Phylogenetic analyses and morphological examinations... more
Recently performed phylogenetic-taxonomic analyses of species belonging to Erysiphe sect. Uncinula on willows (Salix spp.) demonstrated a much higher diversity than previously assumed. Phylogenetic analyses and morphological examinations of Chinese Erysiphe collections on Salix abscondita (= S. raddeana), S. sinica and S. taraikensis, all belonging to Salix subgen. Vetrix sect. Vetrix, revealed an additional cryptic species in sister position to the E. salicis clade, which is described as Erysiphe salicina. The new species clearly distinguished from all allied species in morphological and genetical results. The phylogeny of the new species and closely related species on Populus and Salix spp. (Salicaceae) was reconstructed and discussed using a combined alignment of the internal transcribed spacer (ITS) regions and 28S rDNA sequences. The present phylogenetic analyses suggest that the recently described E. salicicola (on Salix gracilistyla in South Korea) has to be reduced to synony...
Research Interests:
Research Interests: Microbiology, Molecular Evolution, Plant Biology, Time Use, Phylogeny, and 14 moreMolecular clock, Plants, Molecular phylogenetics, Woody Plants, Phylogenetic Tree, Host Pathogen Interactions, Host Range, Elsevier, Ribosomal DNA, Ascomycota, Host Plant, Molecular Sequence Data, Nucleotide sequence, and Species Concept
Research Interests:
During 2011, twigs, leaves and fruits of symptomatic hosts containing Fusicladium species from Guilan, Mazandaran, Qazvin and Ardabil provinces were sampled and examined. Five species including F. carpophilum, F. fraxini, F. oleagineum,... more
During 2011, twigs, leaves and fruits of symptomatic hosts containing Fusicladium species from Guilan, Mazandaran, Qazvin and Ardabil provinces were sampled and examined. Five species including F. carpophilum, F. fraxini, F. oleagineum, F. pomi and F. pyrorum were identified based on morphological data. Of these, F. carpophilum and F. fraxini are identified as new records for the mycobiota of Iran. Fraxinus sp., Prunus persica var. nectarina, Pyracantha sp., red apple cultivar of Malus pumila and Khoj (local variety of Pyrus communis in Guilan province) are identified as new hosts for the genus Fusicladium in Iran. Cultures of F. fraxini, F. pomi and F. pyrorum are deposited at fungal culture collection of Iranian Research Institute of Plant Protection. A brief description and illustration and a key to Fusicladium species reported from Iran are provided.
Research Interests:
Sooty molds are a group of fungi with dark-coloured hyphae, which grow saprophytically on various living plant organs and sometimes on non-living substrates and produce brown to black superficial colonies, black pellicles or... more
Sooty molds are a group of fungi with dark-coloured hyphae, which grow saprophytically on various living plant organs and sometimes on non-living substrates and produce brown to black superficial colonies, black pellicles or pseudoparenchymatous crust. In north of Iran including Guilan and Mazandaran provinces, sooty molds are common on living leaves of a great variety of plants especially Citrus spp. There are a few sporadic reports of sooty mold fungi from Iran in the literature. In continuation of an earlier investigation, sooty molds from different citrus species collected from western parts of Mazandaran province and specimens obtained from fungal collection at University of Guilan were studied. As a result, five mitosporic species viz., Chaetasbolisia falcata, Cylindroxyphium virginianum, Fumiglobus citrinus, Fumiglobus foedus and Polychaeton tenellum, and one ascomyceteous species Phaeosaccardinula epicarpa, were identified as causal agents of sooty mold on citrus plants in t...
Research Interests:
Powdery mildew is one of the most important disease concerns of tomato production in different regions of the world, which is caused by different species of Erysiphales. The most important causal agents of which are Leveillula taurica and... more
Powdery mildew is one of the most important disease concerns of tomato production in different regions of the world, which is caused by different species of Erysiphales. The most important causal agents of which are Leveillula taurica and Oidium neolycopersici. In the present study tomato farms in Qazvin province were surveyed and tomato leaves with powdery mildew symptoms were collected. After morphological studies in laboratory and using reliable resources, the causal agent of tomato powdery mildew was identified as Leveillula taurica. The host range was determined by inoculation of Leveillula taurica from tomato on nine species of plants belonging to four different plant families. All cultivars of tomato, eggplant, pepper and cucumber used in this study, showed disease symptoms on their leaf surfaces. Other plant species including potato, alfalfa, sunflower, clover and sainfoin did not get infected by the pathogen. The nucleotide divergence for the rDNA internal transcribed space...
The newly recognised powdery mildew species Phyllactinia takamatsui on Cotoneaster nummularius (Rosaceae) is described and illustrated. This species, collected in Kerman Province, Iran, is well characterised by its conidial morphology and... more
The newly recognised powdery mildew species Phyllactinia takamatsui on Cotoneaster nummularius (Rosaceae) is described and illustrated. This species, collected in Kerman Province, Iran, is well characterised by its conidial morphology and rDNA ITS sequences clearly different from allied species. Conidia are broadly ellipsoid to subcylindrical, i.e. they are not clavate-spathuliform as in most Phyllactinia species. The rDNA ITS sequence analysis showed that this species is closely allied to other species described on hosts belonging to Rosaceae, such as Ph. mali and Ph. pyri-serotinae. The ITS sequence of P. takamatsui was 92 to 94 % similar to that of the closest known relatives. The new species is described in detail, illustrated and compared with other similar taxa.
Research Interests: Microbiology and Biology
This study was carried out to continue identifying unknown and less known anamorphic fungi from Guilan province. Plant materials with fungal signs and symptoms were collected and examined to identify causal agents. Four species viz.... more
This study was carried out to continue identifying unknown and less known anamorphic fungi from Guilan province. Plant materials with fungal signs and symptoms were collected and examined to identify causal agents. Four species viz. Alternaria calendulae (on Calendula officinalis), Pseudocerco-spra sordida (on Campsis sp.), Thedgonia ligustrina (on Ligustrum vulgare) and Zygosporium oscheoides (on decaying leaves of Bilbergia sp., Monstera deliciosa, and stem of Asparagus sp.) are reported as new to Iranian mycobiota.
Research Interests:
The Erysiphaceae are obligatory and biotrophic fungal parasites that infect many landscapes and ornamental plants, which results in a reduction of beauty and marketability of these plants. This study was performed to identify powdery... more
The Erysiphaceae are obligatory and biotrophic fungal parasites that infect many landscapes and ornamental plants, which results in a reduction of beauty and marketability of these plants. This study was performed to identify powdery mildew fungi on landscape and ornamental plants in four provinces (Isfahan, Chaharmahal & Bakhtiari, Markazi and Lorestan) of Iran. Consequently, 24 powdery mildew taxa on 28 host species were collected from 2017 to 2019. According to our findings, Golovinomyces asperifolii (on Nonea sp.) and Podosphaera euphorbiae-helioscopiae (on Pedilianthus sp.) are new records to Iran mycobiota. Three plant species, including Coreopsis sp., Catharanthus roseus and Fragaria vesca are new hosts for powdery mildew fungi of Iran. Moreover, Podosphaera xanthii on Dahlia sp. is reported for the first time from Iran.
Numerous newly collected & herbarium specimens belonging to the genus Cercospora on a variety of host plants were examined using light microscopy. Six species including Cercospora althaeina, C. flagellaris, C. texensis, Passalora... more
Numerous newly collected & herbarium specimens belonging to the genus Cercospora on a variety of host plants were examined using light microscopy. Six species including Cercospora althaeina, C. flagellaris, C. texensis, Passalora circumscissa, Pseudocercospora daturina & Cercospora apii s.l. (C. avicennae, C. brachiata, C. brunkii, C. daturicola, C. hydrangeae, C. rumicis, C. kikuchii, C. xanthiicola & C. zinniae) were identified. Among these species, C. flagellaris, C. texensis, Pseudocercospora daturina are recorded for the first time from Iran. Species of Amaranthus, Datura, Rumex, Xanthium & Zinnia, respectively, are reported as new host for C. brachiata, C. rumicis, C. xanthiicola , C. zinniae in Iran.
Research Interests:
The Erysiphaceae are obligatory and biotrophic fungal parasites that infect many landscape and ornamental plants which results in reduction of beauty and marketability of these plants. This study was performed to identify powdery mildew... more
The Erysiphaceae are obligatory and biotrophic fungal parasites that infect many landscape and ornamental plants which results in reduction of beauty and marketability of these plants. This study was performed to identify powdery mildew fungi on landscape and ornamental plants in four provinces (Isfahan, Chaharmahal & Bakhtiari, Markazi and Lorestan) of Iran. Consequently, 24 powdery mildew taxa on 28 host species were collected during 2017 to 2019. According to our findings,Golovinomyces asperifolii (on Nonea sp.) and Podosphaera euphorbiae-helioscopiae (on Pedilianthus sp.) are new records to Iran mycobiota. Three plant species including Coreopsis sp., Catharanthus roseus and Fragaria vescaare new hosts for powdery mildew fungi of Iran. Moreover, Podosphaera xanthii on Dahlia sp. is reported for the first time from Iran.
Research Interests:
Two powdery mildew species have been collected from Iran. For the first time, Erysiphe magnifica on Magnolia sp. was identified from Iran based on morphological and molecular characteristics. Erysiphe corylacearum was collected for the... more
Two powdery mildew species have been collected from Iran. For the first time, Erysiphe magnifica on Magnolia sp. was identified from Iran based on morphological and molecular characteristics. Erysiphe corylacearum was collected for the second time in the country and reported for the first time from Guilan province. There are some polymorphisms in ITS-rDNA sequences of E. corylacearum between Iranian and GenBank sequences. This polymorphism is worth of attention for better understanding of the taxonomy of the species and role of ITS sequences for species delimitation. The ITS sequence of the Iranian specimen of E. magnifica was 100% identical to four ITS sequences of E. magnifica in GenBank. Morphologically, E. magnifica was characterized by curved, flexuous and relatively long foot cells, whereas, foot-cells of conidiophores have been reported in the literature as relatively short. According to these observations, it is recommended to check as many characters as possible for identif...
Research Interests:
Rhytidhysteron Speg. 1881 is a small genus of Dothideomycetes (Patellariales, Patellariaceae) comprising about 19 species (Wijayawarden et al. 2017). This genus includes saprobic to weakly plant pathogenic fungi that are found on woody... more
Rhytidhysteron Speg. 1881 is a small genus of Dothideomycetes (Patellariales, Patellariaceae) comprising about 19 species (Wijayawarden et al. 2017). This genus includes saprobic to weakly plant pathogenic fungi that are found on woody plants (Soto-Medina et al. 2017). Members of Rhytidhysteron are clearly distinguished by large, elongate and boat-shaped ascomata, produced on branches and fallen wood (Soto-Medina et al. 2017). The genus shows wide distribution throughout the world (Soto-Medina et al. 2017), although there is no record from Iran. During a study on fungi causing blight disease on boxwood (Buxus sempervirens L.), samples of dead twigs and decaying wood with ascoma of an attractive fungus were collected from the city of Fuman (Ghalehroodkhan), in the north of Iran, (49o 9′ 54.74981′′S, 37o 18′ 16.58509′′W), on June 2017. Isolation and purification of the fungus were done based on conventional methods and single spore cultures were obtained on WA 2%. The specimens were m...
Aquatic hyphomycetes equipped with a rich array of extracellular enzymes are involved in bioremediation of anthropogenic pollutants, plastics, aromatic contaminants and petroleum hydrocarbons. The current study contributes to the... more
Aquatic hyphomycetes equipped with a rich array of extracellular enzymes are involved in bioremediation of anthropogenic pollutants, plastics, aromatic contaminants and petroleum hydrocarbons. The current study contributes to the knowledge of Iranian aquatic hyphomycetes. Sampling was conducted in Anzali lagoon, Gilan province, Iran during 2017. Among 55 fungal isolates obtained during this study, eight species including Arthrobotrys oligosporus, Ceratorhiza hydrophila, Fusarium cf. ensiforme, F. incarnatum species complex, Myrmecridium schulzeri, Paecilomyces variotii, Sarocladium subulatum, and Volutella citrinella were identified based on their morphological characteristics. Furthermore, three species assigned to the genera Arthrobotrys, Fusarium and Sarocladium remained unidentified. Molecular studies using mainly ITS, LSU and SSU rDNA and in some cases β-tubulin (tub2) and translation elongation factor 1-a (tef1) determined the phylogenetic position of the isolates among closel...
Research Interests:
هديكچ هنومن يسررب نيا رد ياه Leveillula عمج هنومن و روشک فلتخم قطانم زا هدش يروآ چراـق عـجرم هـعومجم ياه ترازو ياـه هريت ناهايگ يور نارهت رد روشك يكشزپهايگ تاقيقحت ةسسؤم رد عقاو يزرواشك داهج Asteraceae دنتفرگ رارق هعلاطم دروم . يسررب زا... more
هديكچ هنومن يسررب نيا رد ياه Leveillula عمج هنومن و روشک فلتخم قطانم زا هدش يروآ چراـق عـجرم هـعومجم ياه ترازو ياـه هريت ناهايگ يور نارهت رد روشك يكشزپهايگ تاقيقحت ةسسؤم رد عقاو يزرواشك داهج Asteraceae دنتفرگ رارق هعلاطم دروم . يسررب زا سپ تخير ياه هيارآ ،يسانش هرهب اب اه هتشون زا يريگ ربتعم عبانم و اه دندش مان نييعت و يياسانش دوجوم . نيا ساسا رب هنوگ شش هعلاطم Leveillula لماـش L. guilanensis ، L. lactucae-serriolae ، L. lactucarum ، L. picridis ، L. simonianii و L. taurica s.l. هريت يور Asteraceae دندش يياسانش ناريا رد . هنومن هعلاطم زا هدمآ تسد هب دهاوش اه يـم ناشن يناريا ي دـهد سنج هک Lactuca لماش هنوگ ود طسوت لقادح ناريا رد L. lactucae-serriolae و L. lactucarum يم هدولآ دوـش . ساـسا رـب هنومن عمج ددعتم ياه هيادج ،ناريا زا هدش يروآ ياه L. taurica s.l هريت يور Asteraceae لکش رظن زا رگيدـکي هباشم يسانش افت و دنتسين تو يم هديد اهنآ نيب رد يهجوت لباق يياه دوش . هنومن نيا بلغا ،دوجو نيا اب هـنوگ اب يسانش لکش رظن زا اه ياـه ًلابق هک يرگيد هدش فيصوت يم زيامت لباق اهنآ زا يتخس هب و دنتسه...
Research Interests:
This study was carried out to continue identifying unknown and less known anamorphic fungi from Guilan province. Plant materials with fungal signs and symptoms were collected and examined to identify causal agents. Four species viz.... more
This study was carried out to continue identifying unknown and less known anamorphic fungi from Guilan province. Plant materials with fungal signs and symptoms were collected and examined to identify causal agents. Four species viz. Alternariacalendulae (on Calendulaofficinalis), Pseudocercosporasordida(on Campsis sp.), Thedgonia ligustrina (on Ligustrum vulgare) and Zygosporium oscheoides (on decaying leaves of Bilbergia sp., Monsteradeliciosa, and stem of Asparagus sp.) are reported as new to Iranian mycobiota.
Research Interests:
In this study, ITS–rDNA region was used to identify some anamorphic powdery mildews in Guilan province. According to the results, Erysiphe species on Vicia faba and Sesbania punicea showed 100% similarity to each other, however, without... more
In this study, ITS–rDNA region was used to identify some anamorphic powdery mildews in Guilan province. According to the results, Erysiphe species on Vicia faba and Sesbania punicea showed 100% similarity to each other, however, without ITS sequence of holotype of E. sesbaniae it is impossible to make conclusion whether Vicia faba powdery mildew fungus actually belongs to E. sesbaniae or E. trifoliorum complex. ITS sequence from isolate of Lagerstroemia indica powdery mildew showed 100% similarity to E. australiana. Podosphaera on Vigna fells into phylogenetic group containing P. xanthii on cucurbitaceous hosts. ITS sequence of chamomile (Matricaria chamomilla) powdery mildew fungus showed 100% similarity to P. xanthii on Xanthium strumarium. Molecular characteristics and morphological examination of conidia and conidia germination clearly showed that Dahlia powdery mildew in Guilan province is conspecific with G. spadiceus. Anamorph morphology and ITS sequence of Podosphaera on Epi...
Chestnut blight disease caused by Cryphonectria parasitica, is one of the most important diseases affecting chestnut trees (Castanea sativa) in Guilan province. Seven sites from Shaft (Visrud, Taleghan and Babarekab), Lahijan... more
Chestnut blight disease caused by Cryphonectria parasitica, is one of the most important diseases affecting chestnut trees (Castanea sativa) in Guilan province. Seven sites from Shaft (Visrud, Taleghan and Babarekab), Lahijan (Shahbalutmahaleh and Gharibabad), Rezvanshahr (Doran) and Rasht were selected for investigating occurrence and frequency of vegetative compatibility groups. VCG were assessed according to the mycelial-barrage response on PDA. Among 272 evaluated isolates, four Iranian VCGs namely IR-1 to IR-4 were detected. Diversity of vc groups at individual localities was varied between one and two groups. IR-1 was the dominant VCG occurred at five populations, comprised 63.2% of all isolates and IR-4, with the lowest frequency (3%), occurred only in a single locality. IR-1 was the dominant group in Taleghan and Babarekab with 50/7% and 31/3% respectively. IR-3 was included 88% and 12% of all isolates in Shahbalutmahaleh and Doran respectively. The Shanon diversity index va...
During an investigation on Cladosporium species associated with numerous substrates of various localities in Iran during 2011-13, eight species including C. delicatulum, C. echinulatum, C. exile, C. macrocarpum, C. neriicola, C. pannosum,... more
During an investigation on Cladosporium species associated with numerous substrates of various localities in Iran during 2011-13, eight species including C. delicatulum, C. echinulatum, C. exile, C. macrocarpum, C. neriicola, C. pannosum, C. scabrellum and C. uredinicola were identified based on the morphological characters. All these species are new records for the Iranian mycobiota, except for C. echinulatum, C. macrocarpum and C. uredinicola. Furthermore, C. echinulatum and C. neriicola are reported as plant pathogens, causing lesion and leaf spot of Dianthus sp. and Nerium oleander, respectively.