Phylogenetic systematics of the Ulvaceae (Ulvales, Ulvophyceae) using chloroplast and nuclear DNA sequences
Phylogenetic systematics of the Ulvaceae (Ulvales, Ulvophyceae) using chloroplast and nuclear DNA sequences
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利用叶绿体和核 DNA 序列研究莼菜科（莼菜属）的系统发生学
DOI：
10.1046/j.1529-8817.2002.01167.x
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发表时间：
2002-12-01
影响因子：
2.9
通讯作者：
Waaland, JR
中科院分区：
文献类型：
--
作者：
Hayden, HS;Waaland, JR
利用编码RUBISCO大亚基、rDNA小亚基的基因序列的系统发育分析和组合数据矩阵，对Ulvaceae的系统假设进行了检验。采用最大简约性和最大似然准则，对来自于于藻科和Trebouxiophyceae的8个推定属和12个额外分类群的代表进行了分析。分子数据支持了基于营养菌体早期发育和运动细胞超微结构的ulvacaceae假说。支持ulvaceaceae Floyd和O'Kelly，包括Percursaria Bory de Saint-Vincent、Ulvaria Ruprecht以及Chloropelta Tanner、Enteromorpha Link和Ulva L.的近缘种复群；但浒苔属和浒苔属的单系性不被支持。Floyd和O'Kelly的Ulvales和Ulotrichales是单系的。麒麟和Kornmannia Blidingia与前者有亲缘关系，而Capsosiphon Gobi与后者有亲缘关系，尽管它们与这些目中的其他分类群之间的关系尚不确定。其特征是具有相同的生活史模式，配子体和孢子体在结构和发育上相同，具有双裂片顶盖的运动细胞和由两个相等亚基组成的近端鞘。运动细胞释放的方法和营养菌体的大体形态不是系统可靠的特征。
Systematic hypotheses for the Ulvaceae were tested using phylogenetic analysis of sequences for the gene encoding the large subunit of RUBISCO, small subunit rDNA and a combined data matrix. Representatives of eight putative ulvaceous genera and twelve additional taxa from the Ulvophyceae and Trebouxiophyceae were included in analyses using maximum parsimony and maximum likelihood criteria. Molecular data supported hypotheses for the Ulvaceae that are based on the early development of vegetative thalli and motile cell ultrastructure. Ulvaceae sensu Floyd and O'Kelly, including Percursaria Bory de Saint-Vincent, Ulvaria Ruprecht and a complex of closely related species of Chloropelta Tanner, Enteromorpha Link and Ulva L. was supported; however, monophyly of Enteromorpha and Ulva was not supported. The Ulvales and Ulotrichales sensu Floyd and O'Kelly were monophyletic. Blidingia Kylin and Kornmannia Bliding were allied with the former and Capsosiphon Gobi with the latter, although relationships among these and other taxa in these orders remain uncertain. The Ulvales are characterized by an isomorphic life history pattern, gametangia and sporangia that are identical in structure and development, motile cells with bilobed terminal caps and proximal sheaths consisting of two equal subunits. Method of motile cell release and the gross morphology of vegetative thalli are not systematically reliable characters.