Mikhailov K V, Tikhonenkov D V, Janouškovec J, Diakin A Y, Ofitserov M V, Mylnikov A P, Aleshin V V
Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.
Biochemistry (Mosc). 2015 Nov;80(11):1492-9. doi: 10.1134/S0006297915110115.
Phylogenetic analysis of large subunit ribosomal RNA (LSU rRNA or 28S rRNA) gene sequences from free-living predatory flagellates Colpodella angusta, Voromonas pontica, and Alphamonas edax (Apicomplexa) confirms their close relationship with chromerids Chromera velia and Vitrella brassicaformis, which possess a functional photosynthetic plastid. Together these organisms form a sister group to parasitic apicomplexans (coccidians and gregarines, or sporozoans sensu lato). This result agrees with the previous conclusion on monophyly of colpodellids and chromerids (chrompodellids) based on phylogenomic data. The revealed relationships demonstrate a complex pattern of acquisition, loss, or modification of plastids and transition to parasitism during alveolate evolution.
对自由生活的捕食性鞭毛虫——狭长颈瓶虫（Colpodella angusta）、 Pontica 沃罗单胞菌（Voromonas pontica）和食腐阿尔法单胞菌（Alphamonas edax，顶复门）的大亚基核糖体RNA（LSU rRNA或28S rRNA）基因序列进行系统发育分析，证实它们与具有功能性光合质体的色虫类——维氏色虫（Chromera velia）和芸苔形玻璃藻（Vitrella brassicaformis）关系密切。这些生物共同构成了寄生顶复门生物（球虫和簇虫，或广义的孢子虫）的姐妹群。这一结果与之前基于系统基因组数据得出的关于长颈瓶虫类和色虫类（色长颈瓶虫类）单系性的结论一致。所揭示的关系表明，在肺泡虫进化过程中，质体的获得、丧失或修饰以及向寄生状态的转变呈现出复杂的模式。
