Pythium

Japanese: フハイカビ(英語表記)Pythium
Pythium
A genus of fungi in the order Pyralidae, class Oomycetes, subphylum Flagellates. A pathogenic fungus that parasitizes plants and causes seedling damping-off and cotton rot. It generally rots seedlings and roots, forming cotton-like colonies. The zoosporangium (presporangium) is spherical to lemon-shaped and looks like a single conidium at the end of a stalk. The contents turn into numerous zoospores that break the membrane and swim out ( P. aphanidermatum (Edson) Fitzp.), and some produce conidia ( P. debaryanum Hesse).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
鞭毛菌亜門卵菌綱ツユカビ目に含まれる1属の菌類。植物に寄生して苗立枯(なえたちがれ)病,綿腐(わたぐされ)病を起こす病原菌。一般に苗や根の部分を腐敗させて,綿のようなコロニーを形成する。遊走子囊(前胞子囊)は球形~レモン形で,あたかも柄の先端にできた1個の分生子のように見える。内容物は多数の遊走子となり膜を破って泳ぎ出したり(P.aphanidermatum (Edson) Fitzp.),分生子をつくるものもある(P.debaryanum Hesse)。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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