Feather-shaped flagellum

Japanese: 羽型鞭毛 - うけいべんもう
Feather-shaped flagellum

…Red algae, which have chlorophyll a and other pigment proteins such as phycoerythrin and phycocyanin as major accessory pigments and store red algal starch as a photosynthetic product, produce reproductive cells without flagella, whereas brown algae, which have fucoxanthin in addition to chlorophyll a and c and store laminaran and mannitol, form swimming reproductive cells with pointed oval shapes and two flagella, one long and one short, on the sides. Of these two flagella, the one that extends forward is a so-called feather flagellum, with trichomes in line on both sides, and the one that extends backward is a whip flagellum with no appendages on the surface. In green algae, which have chlorophyll a and b and store starch, the swimming reproductive cells are basically pointed oval shapes, with equal-length, whip-shaped flagella extending forward from the front end. …

*Some of the terminology explanations that mention "wing flagellum" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…クロロフィルaのほかに主要な補助色素としてフィコエリトリンやフィコシアニンなどの色素タンパク質をもち,光合成産物として紅藻デンプンを貯蔵する紅藻類は鞭毛をもたない生殖細胞をつくるのに対し,クロロフィルacのほかにフコキサンチンをもち,ラミナランやマンニトールを貯蔵する褐藻類は,長短2本の鞭毛を側部にもつ先のとがった卵形の泳ぐ生殖細胞を形成する。この2本の鞭毛のうち,前方に伸びるものは両側に小毛を並列する,いわゆる羽型鞭毛であり,後方に伸びるものは表面に付属物のないむち型鞭毛である。またクロロフィルabをもち,デンプンを貯蔵する緑藻類では,泳ぐ生殖細胞は先のとがった卵形が基本型で,前端から前方に等長,むち型の鞭毛が伸びる。…

※「羽型鞭毛」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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