中国海菜花属植物三种同工酶的酶谱式样及其系统学含义

ELECTROPHORETIC BANDING PATTERNS OF THREE ISOENZYMES OF CHINESE OTTELIA AND THEIR SYSTEMATIC SIGNIFICANCE

本文研究了代表中国海菜花属全部已知分类群的18个野生居群的过氧化物酶同工酶(POX),和其中7个居群的细胞色素氧化酶同工酶(COX),3个居群的酯酶同工酶酶谱式样及其系统学含义。结果表明:所有分类群的POX酶谱和龙舌草的COX酶谱均具多形现象,暗示编码有关同工酶的基因在种内居群间存在差异;3种同工酶都具分类价值,其分类结果与形态学分类结果一致支持将出水水菜花归并到水菜花中,取消海菜花的两个变种——路南海菜花和通海海菜花,而仅保留变种波叶海菜花。此外,本文初步揭示了POX酶谱式样与繁育系统的相关性。

In this papery. explored were the electrophoretic banding patterns (EBP)of peroxidase of 18 wild populations representing all the taxa of Ottelia so far known in China, cytochrome oxidase of seven selected populations and esterase of three chosen ones from the 18 populations, and their systematic significance. The results show that there existed a polymorphism both in EBP of peroxidase of all the taxa studied and in that of cytochrome oxidase of O. alismoides, which means that there is some difference in the genes coding the isoenzymes eoneerned among the populations within a species; all the three isoenzymes detected were of taxonomic importance; O. emersa should be reduced to a synonym of O. cordata, O. acuminata var. lunannsis and var. tonhaiensis be ancelled while var. crispa be kept up, which was in conformity with that based on the morphology. In addition, the relationships between EBP of peroxidase and breeding systems was preliminarily revealed.