http://www.mainichi-msn.co.jp/today/news/20051014k0000m040169000c.html
「半植半獣」てのはプレス向けの俗な説明っぽい(まぁ役人に金出させるにはそういうのも必要だけど)。「二次共生」てのが進行中かも、というのが要点っぽい。えーと細砲分裂の時に葉緑体って自分で分裂するんでしたっけ、それとも核で作られるんでしたっけ。後者だとすれば、進化の過程で前者から後者へ移行したわけで、なんかすごい。キーワード葉緑体に書いてあった。DNAは自前か。でも作ってもらうのは核？あ、けっこう核の方にも葉緑体のゲノムが移動してるらしい。ほほー。
A Secondary Symbiosis in Progress?
Noriko Okamoto and Isao Inouye
Algae have acquired plastids by developing an endosymbiotic relationship with either a cyanobacterium (primary endosymbiosis) or other eukaryotic algae (secondary endosymbiosis). We report a protist, which we tentatively refer to as Hatena, that hosts an endosymbiotic green algal partner but inherits it unevenly. The endosymbiosis causes drastic morphological changes to both the symbiont and the host cell architecture. This type of life cycle, in which endosymbiont integration has only partially converted the host from predator to autotroph, may represent an early stage of plastid acquisition through secondary symbiosis.
