Common evolutionary origin of planktonic and benthic nitrogen-fixing oscillatoriacean cyanobacteria from tropical oceans
Common evolutionary origin of planktonic and benthic nitrogen-fixing oscillatoriacean cyanobacteria from tropical oceans
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DOI：
10.1111/j.1574-6968.2006.00321.x
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发表时间：
2006-07-01
影响因子：
2.1
通讯作者：
Golubic, Stjepko
中科院分区：
文献类型：
--
作者：
Abed, Raeid M. M.;Palinska, Katarzyna A.;Golubic, Stjepko
丝状蓝藻属于水鞘藻属(Blennothrix)，是热带海洋中最常见的垫状蓝藻之一。我们在这里提出的证据表明，这些底栖蓝细菌在形态和系统发育上与浮游毛霉菌非常接近。根据16S rRNA基因、nifH基因、藻蓝蛋白和藻红蛋白基因间隔区的序列建立了独立的亲缘关系。这两个属的物种在系统发育重建的蓝藻树中形成了一个共同的不同分支，这表明蓝藻底栖生物和浮游生物的主要成分具有早期的共同起源，都是当今热带海洋氮素收支的主要贡献者，就像在遥远的地质过去一样。
The filamentous cyanobacteria belonging to the genus Hydrocoleum (Blennothrix) are among the most common mat-forming cyanobacteria in tropical oceans. We present here the evidence that these benthic cyanobacteria are morphologically and phylogenetically very close to the planktonic species of Trichodesmium. Genetic relationship was established independently with regard to sequences of the 16S rRNA gene, nifH gene, and phycocyanin and phycoerythrin intergenic spacers. The species of both genera formed a common distinct branch in phylogenetically reconstructed cyanobacterial trees, suggesting that the main constituents of cyanobacterial benthos and plankton have an early common origin and both represent major contributors to nitrogen budget of tropical oceans today as in the distant geological past.