Systematic position of Asteropyrum (Ranunculaceae) inferred from chloroplast and nuclear sequences

被引:24
作者
Wang, W [1 ]
Li, RQ
Chen, ZD
机构
[1] Chinese Acad Sci, Inst Bot, Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
关键词
Asteropyrum; Ranunculaceae; rbcL; 26S rDNA; molecular phylogeny;
D O I
10.1007/s00606-005-0339-z
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Sequences of chloroplast gene rbcL and partial nuclear 26S rDNA were used to evaluate phylogenetic relationships of Asteropyrum. Four primary clades were recognized in Ranunculaceae, corresponding to subfamilies Hydrastidoideae, Coptidoideae, Thalictroideae, and Ranunculoideae. Our results place Asteropyrum in Ranunculoideae, sister to the tribe Actaeeae, which includes Beesia, Cimicifuga, and Eranthis. This is supported by chromosome characters, including chromosome size and basic number, and the stainability of prophase chromosomes and interphase nuclei. Our results do not support previous placements of Asteropyrum in either Coptidoideae or Thalictroideae. Considering its uniqueness in a few characters (e.g. simple peltate leaves, accumulating benzylisoquinoline alkaloids, vessel elements with only typical scalariform perforation plates), we recognize Asteropyrum as a monotypic tribe of Ranunculoideae, Asteropyreae W. T. Wang et C. Y. Chang.
引用
收藏
页码:41 / 54
页数:14
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