Planospore

Japanese: planospore
Planospore

...When the hybrid between species is sterile, the resulting spores are usually abnormal and amorphous in shape and have a very low ability to germinate.
[Various spores]
There are two types of spores: planospores, which are motile zoospores with flagella, and aplanospores, which are non-motile spores without flagella. Zoospores are usually called zoospores and are found in green algae, brown algae, and phycomycetes.

*Some of the terminology that mentions "planospore" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…種間の交雑によってできた雑種が不稔の場合は,それからできる胞子はふつう形は異常かつ不定形で,発芽能力も著しく低い。
[さまざまな胞子]
 胞子には鞭毛をもった運動性の動胞子planosporeと,鞭毛をもたない非運動性の不動胞子aplanosporeがある。動胞子はふつう遊走子とよばれ,緑藻,褐藻,藻菌類などにみられる。…

※「planospore」について言及している用語解説の一部を掲載しています。

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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