A new Epichloëspecies distributed in Africa,Europe,North America and South America on host genera Bromus,Festuca,Lolium and Poa is ***,characteristic of the genus,frequently occurred on the reproductive tillers of Poa...
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A new Epichloëspecies distributed in Africa,Europe,North America and South America on host genera Bromus,Festuca,Lolium and Poa is ***,characteristic of the genus,frequently occurred on the reproductive tillers of Poa secunda ***,but neither perithecia nor mature asci were *** cells and conidial characteristics were in the range of Epichloë*** of the genes encodingβ-tubulin(tub2)and translation elongation factor 1-α(tef1)were amplified and *** analyses of these sequences grouped the Poa secunda *** endophyte into one group within a non-hybrid Epichloëspecies *** the basis of morphology,host range and evolutionary history we propose that this endophyte represents a new species of Epichloë.The name Epichloëpoae is proposed for this *** infectivity of the conidia produced on plants was *** the first experiment,using conidia of Epichloëpoae from leaves and endophytefree seeds of Poa secunda *** we show that when germinating seeds and developing seedlings of the plant were exposed to conidia,28–57%of seedlings became infected by the *** non-inoculated control plants showed no colonization by the *** the following spring after vernalization,colonized plants on flowering culms produced stromata with *** the second experiment,using stromal conidia and the same procedure,19–42%of seedlings of Poa secunda *** became colonized by the *** results demonstrate that Epichloëpoae may spread to uninfected grass hosts by conidia frequently formed on the surfaces of plant leaves as well as by conidia formed on stromata.
Culturable fungal population diversity and succession was investigated in developing cranberry ovaries of fruit rot-resistant and rot-susceptible cranberry selections,from flower through mature *** were recovered in c...
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Culturable fungal population diversity and succession was investigated in developing cranberry ovaries of fruit rot-resistant and rot-susceptible cranberry selections,from flower through mature *** were recovered in culture from 1185 of 1338 ovary tissues collected from June to September,yielding 2255 isolates that represented 42 *** the season,species richness varied from 2 to 17 and 2 to 18 in rot-resistant and rotsusceptible selections,respectively,increasing from wk1 to wk10 and then gradually declining to ***-Wiener diversity index varied from 0.27 to 2.32 in rotresistant and 0.18 to 2.38 in rot-susceptible,and Pielou’s evenness index varied from 0.11 to 0.63 and 0.06 to 0.64 in rot-resistant and rot-susceptible selections,respectively,confirming that diversity of fungi in developing ovaries was similar among rot-resistant and rot-susceptible selections,but varied among sampling time *** component analysis grouped samples collected at the same sampling time point together regardless of rot susceptibility of the selections,and detected the predominant fungal species associated with each stage of *** changes were observed in populations of endophytic,pathogenic and saprophytic fungi throughout the season as ovaries matured.
Plant pathogenic fungi are a large and diverse assemblage of eukaryotes with substantial impacts on natural ecosystems and human *** taxa often have complex and poorly understood life cycles,lack observable,discrimina...
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Plant pathogenic fungi are a large and diverse assemblage of eukaryotes with substantial impacts on natural ecosystems and human *** taxa often have complex and poorly understood life cycles,lack observable,discriminatory morphological characters,and may not be amenable to in vitro *** a result,species identification is frequently ***(DNA sequence)data have emerged as crucial information for the taxonomic identification of plant pathogenic fungi,with the nuclear ribosomal internal transcribed spacer(ITS)region being the most popular ***,international nucleotide sequence databases are accumulating numerous sequences of compromised or low-resolution taxonomic annotations and substandard technical quality,making their use in the molecular identification of plant pathogenic fungi *** we report on a concerted effort to identify high-quality reference sequences for various plant pathogenic fungi and to re-annotate incorrectly or insufficiently annotated public ITS sequences from these fungal lineages.A third objective was to enrich the sequences with geographical and ecological *** results-a total of 31,954 changes-are incorporated in and made available through the UNITE database for molecular identification of fungi(http://***),including standalone FASTA files of sequence data for local BLAST searches,use in the next-generation sequencing analysis platforms QIIME and mothur,and related *** present initiative is just a beginning to cover the wide spectrum of plant pathogenic fungi,and we invite all researchers with pertinent expertise to join the annotation effort.
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