Oomycetes -Cell Walls - Non-elaborates posts - Post 7


Unlike fungi, whose cell walls contain chitin, oomycete cell walls are made primarily of cellulose and β-glucans. Most vegetative cells of oomycetes are diploid, while fungi are usually haploid or dikaryotic during most of their life cycle. They reproduce both sexually (via oospores, hence the name “oo”-mycete, meaning “egg fungus”) and asexually (through sporangia and motile zoospores equipped with flagella). Many are aquatic, but numerous important species are plant pathogens. Famous examples include Phytophthora infestans (the cause of potato late blight, responsible for the Irish potato famine) and Plasmopara viticola (which causes grapevine downy mildew).

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