Phylogenetic relationships of Scenedesmus and Acutodesmus (Chlorophyta, Chlorophyceae) as inferred from 18S rDNA and ITS-2 sequence comparisons

被引：42

作者：

Hegewald, E

Wolf, M

机构：

[1] Forschungszentrum Julich, Inst Chem & Dynam Geosphere 3, D-52425 Julich, Germany

[2] Univ Wurzburg, Bioctr, Dept Bioinformat, D-97074 Wurzburg, Germany

来源：

PLANT SYSTEMATICS AND EVOLUTION | 2003年 / 241卷 / 3-4期

关键词：

18S rDNA; ITS-2; Acutodesmus; Chlorophyta; Chlorophyceae; molecular systematics; phylogeny; Scenedesmus; taxonomy;

D O I：

10.1007/s00606-003-0061-7

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The complete 18S rDNA and ITS-2 sequences of two strains of Scenedesmus arcuatus were determined and subjected to phylogenetic analyses. Furthermore, ITS-2 sequences of Scenedesmus obtusus, of S. hindakii, and of Acutodesmus regularis were investigated. Phylogenetic analyses indicated that S. hindakii is most closely related to S. raciborskii and/or S. obtusus, embedded in the Scenedesmuscluster. The morphologically similar S. arcuatus and its variety platydiscus branched outside the Scenedesmus/Acutodesmus cluster (18S) or together with A. regularis and A. pectinatus (ITS-2). Therefore, the genera Acutodesmus and/or Scenedesmus are paraphyletic. S. arcuatus is not closely related to S. hindakii.

引用

页码：185 / 191

页数：7

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