最近，灰胞藻门藻类(Cyanophora paradoxa)完整基因组已被美国罗格斯大学Debashish Bhattacharya博士带领的一个国际协会阐明。佛雷堡大学Stefan Rensing博士和生物学教职工Aikaterini Symeonidi通过进行编码转录因子分类和种系发生的分析致力于基因组分析以及检查和清除基因组污染。
研究结果发表在当前期Science上。
今天的植物和藻类，它们形成许物食物链的基底，包含有很少的通过光合作用将气体二氧化碳变换成糖的绿色反应器（色素体、质体）。早期散发藻类蓝载藻(Cyanophora paradoxa)的基因组提供了一个事实的确凿证据，这个事实就是十多亿年前色素体在一个单一进化事件中通过所谓的初级内共生而获得。今天我们在陆生植物、红色和绿色藻类及灰胞藻蓝载藻中发现的质体都可以追溯到单一决定性事件，它使真核生物从阳光中获取能量。
相对较小的基因组（~70Mbp）已被来自6个国家30名科学家组成的研究小组测序和分析。因为它代表了从什么成为今天陆生植物分支的最早谱系，它对将来的许多比较基因组学研究有很高价值。（生物谷bioon.com）
doi:10.1126/science.1213561
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PMID:
Cyanophora paradoxa Genome Elucidates Origin of Photosynthesis in Algae and Plants
D. C. Price, C. X. Chan, H. S. Yoon, E. C. Yang, H. Qiu, A. P. M. Weber, R. Schwacke, J. Gross, N. A. Blouin, C. Lane, A. Reyes-Prieto, D. G. Durnford, J. A. D. Neilson, B. F. Lang, G. Burger, J. M. Steiner, W. Loffelhardt, J. E. Meuser, M. C. Posewitz, S. Ball, M. C. Arias, B. Henrissat, P. M. Coutinho, S. A. Rensing, A. Symeonidi, H. Doddapaneni, B. R. Green, V. D. Rajah, J. Boore, D. Bhattacharya
ABSTRACT The primary endosymbiotic origin of the plastid in eukaryotes more than 1 billion years ago led to the evolution of algae and plants. We analyzed draft genome and transcriptome data from the basally diverging algaCyanophora paradoxa and provide evidence for a single origin of the primary plastid in the eukaryote supergroup Plantae. C. paradoxa retains ancestral features of starch biosynthesis, fermentation, and plastid protein translocation common to plants and algae but lacks typical eukaryotic light-harvesting complex proteins. Traces of an ancient link to parasites such as Chlamydiae were found in the genomes of C. paradoxa and other Plantae. Apparently, Chlamydia-like bacteria donated genes that allow export of photosynthate from the plastid and its polymerization into storage polysaccharide in the cytosol.
