A multi-gene molecular investigation of the kelp (Laminariales, Phaeophyceae) supports substantial taxonomic re-organization
A multi-gene molecular investigation of the kelp (Laminariales, Phaeophyceae) supports substantial taxonomic re-organization
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DOI：
10.1111/j.1529-8817.2006.00204.x
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发表时间：
2006-04-01
影响因子：
2.9
通讯作者：
Saunders, GW
中科院分区：
文献类型：
--
作者：
Lane, CE;Mayes, C;Saunders, GW
每年都有大量的生态学、生物化学和生理学研究使用海带目的成员。尽管海带是世界上研究最深入的大型藻类之一，但在三个“衍生”家族（Alariaceae，Laminariaceae和Lessoniaceae（ALL））内部和之间的分类存在重大争议。发表的ALL家族的分子系统发育学产生的假设与目前的形态学分类强烈不一致，然而，冲突的系统发育假设和一贯的低水平的支持，实现了所有这些研究导致保守的方法进行分类修订。为了解决这个组内的关系，我们已经测序超过6000 bp的区域在核，叶绿体，线粒体基因组和贝叶斯，邻居加入，简约分析包括42个类群。该结果是第一个全面的和良好的支持海带的ALL复合体的分子遗传学。我们保留了三个公认的科（Alariaceae，Laminariaceae和Lessoniaceae），但组成有很大不同，并提出Costariaceae fam。nov.为琼脂属，Costaria，Dictyoneurum和Thalassiophyllum，在海带目中唯一的属，具有扁平的，偶尔圆柱状的柄和一个扁平或网状的叶片。此外，我们的数据强烈支持海带属的分裂。我们复活了不含L. digitata（哈德逊）J.V. Lamouroux，模式属。
Every year numerous ecological, biochemical, and physiological studies are performed using members of the order Laminariales. Despite the fact that kelp are some of the most intensely studied macroalgae in the world, there is significant debate over the classification within and among the three "derived" families, the Alariaceae, Laminariaceae, and Lessoniaceae (ALL). Molecular phylogenies published for the ALL families have generated hypotheses strongly at odds with the current morphological taxonomy; however, conflicting phylogenetic hypotheses and consistently low levels of support realized in all of these studies have resulted in conservative approaches to taxonomic revisions. In order to resolve relationships within this group we have sequenced over 6000 bp from regions in the nuclear, chloroplast, and mitochondrial genomes and included 42 taxa in Bayesian, neighbor-joining, and parsimony analyses. The result is the first comprehensive and well-supported molecular phylogeny for the ALL complex of the Laminariales. We maintain the three recognized families (Alariaceae, Laminariaceae, and Lessoniaceae), but with vastly different compositions, as well as propose the Costariaceae fam. nov. for Agarum, Costaria, Dictyoneurum, and Thalassiophyllum, the only genera in the Laminariales with flattened, occasionally terete, stipes and either a perforate or reticulate blade. In addition, our data strongly support a split of the genus Laminaria. We resurrect the genus Saccharina Stackhouse for the Laminaria clade that does not contain L. digitata (Hudson) J.V. Lamouroux, the type of the genus.