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Phaeosphaeria nodorum : ウィキペディア英語版 | Phaeosphaeria nodorum
''Phaeosphaeria nodorum'' (synonym and correct taxonomic name: ''Parastagonospora nodorum'') is a major fungal pathogen of wheat (''Triticum aestivum'') and a member of the Dothideomycetes, a large fungal taxon that includes many important plant pathogens affecting all major crop plant families. The Dothideomycetes are a newly recognised major class of filamentous fungi that replaces the long-recognized loculoascomycetes. It includes the causal organisms of many economically important plant diseases.
== Disease cycle == The infection occurs in repeated cycles of both asexual and sexual infection throughout the growing season. New rounds of infection are initiated by rain-splash or wind dispersal of spores. Infection begins when spores land on leaf tissue. The spores rapidly germinate to produce long, branching threadlike structures, called hyphae. The hyphae invade the leaf, using specialised branches to gain entry to the outermost layer of cells on the leaves. They can also grow directly through pores in the leaves. The hyphae rapidly colonize the leaves and begin to produce asexual fruiting bodies.
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