Janson Sven
Department of Biology and Environmental Science, University of Kalmar, SE-391 82 Kalmar, Sweden.
Environ Microbiol. 2004 Oct;6(10):1102-6. doi: 10.1111/j.1462-2920.2004.00646.x.
Some species of the dinoflagellate genus Dinophysis form red tides and are toxin producers with a great environmental impact. The dinoflagellates as a group display high plastid diversity. Several cases indicate that plastids have been replaced. In the case of the genus Dinophysis, the plastids show characteristics of a plastid originating from a cryptophyte. Recent molecular evidence showed that the plastid indeed originates from a cryptophyte, but the source could not be identified to species or genus level. The data presented here show that both a 799 bp region of the psbA gene and 1,221 bp region of the 16S rRNA gene from Dinophysis spp. are identical to the same loci in Teleaulax amphioxeia SCCAP K434. This strongly indicates that the plastid was acquired recently in Dinophysis and may be a so-called kleptoplastid, specifically originating from a species of Teleaulax.
某些裸甲藻属的甲藻会形成赤潮，并且是具有重大环境影响的毒素生产者。作为一个群体，甲藻表现出高度的质体多样性。有几个案例表明质体已被取代。就裸甲藻属而言，质体表现出来自隐藻的质体特征。最近的分子证据表明，该质体确实起源于隐藻，但无法在物种或属的水平上确定其来源。此处给出的数据表明，来自裸甲藻属物种的psbA基因的799 bp区域和16S rRNA基因的1221 bp区域与双尖双眉藻SCCAP K434中的相同位点相同。这有力地表明，裸甲藻属的质体是最近获得的，可能是一种所谓的盗食质体，具体起源于双眉藻属的一个物种。
