A general term for a genus of fungi in the Physarales order of the Myxomycota subclass of the Myxomycota phylum. The representative species is P. polycephalum Schweinitz. It forms yellow to gray stalked sporangia (1.5 to 2 mm high) on a membranous plasmodium. Usually, 2 to 10 sporangia are irregularly fused to form a mass-like head. The exine is brittle, the capillaries are reticulate, and the spores are purple-brown and black when gathered together. Physcomycota shows marked protoplasmic streaming and is yellow. Because it can be cultivated relatively easily using oatmeal as a food, Physcomycota has long been used as a research material for protoplasmology, karyology, the biochemistry of morphogenesis and differentiation, and genetics. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
変形菌門真正変形菌亜綱フィザルム目に含まれる1属の菌類の総称。代表種はモジホコリカビP.polycephalum Schweinitzである。柄のある黄~灰色の胞子囊(高さ1.5~2mm)を,膜質の変形膜上に形成する。胞子囊は普通は,2~10個が不規則に合着した集塊状の頭部を形成している。外皮はもろく,細毛体は網状,胞子は紫褐色で,集まると黒色を示す。変形体は著しい原形質流動を示し,黄色。オートミールなどをえさとして比較的簡便に培養できるため,変形体を用い,原形質学,核学,形態形成や分化の生化学,遺伝学の研究材料として古くからよく用いられている。
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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