نتایج جستجو برای: rpb2
تعداد نتایج: 348 فیلتر نتایج به سال:
Early blight (EB) is a destructive disease affecting potato and tomato plants in Russia, caused by heterogeneous group of plant pathogenic Alternaria fungi. The current species delimitation sect. Porri with medium to large conidia long (filamentous) beak based on molecular data. In this study, the ITS, GAPDH, RPB2, TEF1, Alt 1 gene regions were analyzed 41 large-spored isolates obtained from di...
The family Inocybaceae has been poorly studied in Africa. Here we describe the first species of genus Mallocybe from West African and Zambian woodlands dominated by ectomycorrhizal trees Fabaceae Phyllanthaceae. new M. africana is characterized orange-brown fruitbodies, a fibrillose pileus, stipe tapered towards base large ellipsoid basidiospores. It resembles many north south temperate but mos...
Melanopus is a morphological group of Polyporus which contains species with a black cuticle on the stipe. In this article, taxonomic and phylogenetic studies on Melanopus group were carried out on the basis of morphological characters and phylogenetic evidence of DNA sequences of multiple loci including the internal transcribed spacer (ITS) regions, the large subunit nuclear ribosomal RNA gene ...
The new stipitate species of Hypocrea, H. seppoi; is described, based on material freshly collected in Finland. Characterization of this species includes morphology of teleomorph and anamorph, culture studies and molecular phylogeny. H. seppoi is compared to the other European soil-inhabiting, stipitate Hypocrea species. It is characterized by small stromata, thin fibrous stipe, perithecia decu...
Cenococcum is a genus of ectomycorrhizal Ascomycota that has a broad host range and geographic distribution. It is not known to produce either meiotic or mitotic spores and is known to exist only in the form of hyphae, sclerotia and host-colonized ectomycorrhizal root tips. Due to its lack of sexual and asexual spores and reproductive structures, it has proven difficult to incorporate into trad...
Beauveria sinensis sp. nov. was isolated from a larva of Geometridae (Lepidoptera) collected from Tiantangzhai, Anhui province, China. It is characterized by elongated ellipsoidal to cylindrical conidia, solitary conidiogenous cells that are cylindrical or with slightly swollen bases, white to pale pink colony in culture, and small mycelial pellets consisting of curved hyphae. Phylogenetic anal...
In July 2015, diseased leaves of black chokeberry (Aronia melanocarpa) were observed in Danyang and Gochang, Korea. The symptoms appeared as circular or irregular brown leaf spots, from which Alternaria tenuissima was isolated. The isolates were cultured on potato dextrose agar, and their morphological characteristics were observed under a light microscope. The colonies were whitish to ash colo...
The members of Amanita sect. Phalloideae (Fr.) Quél. are responsible for many fatalities worldwide. However, some species in this section have previously been reported as non-lethal and lacking deadly toxins. Sequences five genes (ITS, nrLSU, RPB2, TEF1-α, TUB2) belonging to the from tropical Africa, America, Asia, Australia, Europe were included study elucidate phylogenetic relationships among...
A well resolved phylogeny of the Agaricaceae based on partial rpb2 sequences is presented from a wide geographic and systematic sampling of the family and compared to phylogenies based on nrLSU and tef1 sequences. A smaller dataset of the family focusing on the Agaricus clade of nrITS sequences and a combined dataset were used to determine the position of several white-spored taxa from northern...
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