Sayamidoro - Sayamidoro

Japanese: サヤミドロ - さやみどろ

A genus of minute, single-row filamentous green algae that grow on aquatic plants and poles in rice paddies, ponds, lakes, marshes, and other places. Approximately 400 species are known worldwide, and about 65 in Japan. Sexual reproduction is by eggs and sperm, and asexual reproduction is by zoospores. The order Oedogoniales was established because both the swimming sperm and zoospores have numerous flagella arranged in a crown-like shape at the tip, and because they undergo a unique pattern of somatic cell division not seen in other green algae. This order includes the family Oedogoniaceae, which includes the genus Oedogonia, which has unbranched filaments, as well as two genera: Bulbochaete , which has stinging hairs on the apical cells of the branching filaments, and Oedocladium , which has no stinging hairs on the apical cells.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

水田，池，湖沼，湿原などの水草や棒杭などに生育する単列糸状の微細な緑藻の1属で，全世界で約400種，日本では約65種が知られる。有性生殖は卵と精子，無性生殖は遊走子により行われるが，遊泳性の精子と遊走子がともに先端に王冠状に配列する多数の鞭毛をもつこと，および他の緑藻には見られない独特の様式の体細胞分裂を行うことの特徴により，サヤミドロ目Oedogonialesが創設されている。この目にはサヤミドロ科の1科が含まれ，それには，分枝のない糸状体のサヤミドロ属のほかに，分枝する糸状体の先端細胞に刺毛をもつブルボケーテ属Bulbochaeteと先端細胞に刺毛のないエドクラディウム属Oedocladiumの2属が所属する。

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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