Gustavs Lydia, Görs Manuela, Karsten Ulf
Institute of Biological Sciences, Applied Ecology, University of Rostock, Albert-Einstein-Strasse 3, D-18051 Rostock, Germany.
J Phycol. 2011 Jun;47(3):533-537. doi: 10.1111/j.1529-8817.2011.00979.x. Epub 2011 Apr 25.
The distribution of polyols was examined for the first time in 34 green algal strains from four different clades belonging to the class Trebouxiophyceae, which dominate aeroterrestrial biofilms of many regions. Sorbitol was detected in representatives of the Prasiola clade, while ribitol was present in the Elliptochloris and Watanabea clades. Apatococcus lobatus (Chodat) J. B. Petersen contained erythritol in addition to ribitol. Polyols are considered as effective stress metabolites exerting multiple protective functions in metabolism and hence mainly occur in organisms colonizing extreme environments. In contrast, members of the Chlorella clade, which mainly occur in aquatic habitats, did not contain polyols. Thus, the constitutive presence of specific polyols facilitates a differentiation between species of the Prasiola clade from the Elliptochloris and Watanabea clades, respectively, and further allows differentiation of morphologically converging taxa.
首次对来自绿藻纲小球藻目四个不同进化枝的34个绿藻菌株中的多元醇分布进行了研究，这些菌株在许多地区的气生生物膜中占主导地位。在原溪菜进化枝的代表中检测到了山梨醇，而核糖醇则存在于椭圆绿藻和渡边藻进化枝中。球状空星藻除了含有核糖醇外，还含有赤藓醇。多元醇被认为是有效的应激代谢产物，在新陈代谢中发挥多种保护功能，因此主要存在于栖息在极端环境中的生物体内。相比之下，主要生活在水生栖息地的小球藻进化枝成员不含多元醇。因此，特定多元醇的组成性存在分别有助于区分原溪菜进化枝与椭圆绿藻和渡边藻进化枝的物种，并且进一步允许区分形态趋同的分类群。
