玉叶金花种内性状置换的初步研究  

Character displacement in Mussaenda pubescens(Rubiaceae)

作　　者：赖明[1,2] 罗中莱[1] 张奠湘[1] 

机构地区：[1]中国科学院华南植物园,广州510650 [2]中国科学院研究生院,北京100049

出　　处：《广西植物》2009年第6期724-728,共5页Guihaia

基　　金：国家自然科学基金(30570314);中国科学院知识创新工程(KSCX2-YW-Z-027)~~

摘　　要：通过对茜草科玉叶金花属植物玉叶金花传粉生物学及种内形态分化和分布特点的初步研究,发现该种的两个变种玉叶金花和白花玉叶金花在形态和生境适应上都有一定的规律。研究表明,楠藤与开黄花的玉叶金花原变种的传粉者主要是鳞翅目昆虫,而玉叶金花的白花变种的有效传粉者是膜翅目昆虫。认为变种白花玉叶金花居群的出现与同属植物楠藤的同域分布及避免相互竞争传粉者有关。白花玉叶金花变种的出现属于性状置换现象。Based on the primary studies of the pollination biology,intra-spedes morphological differentiation and distribution of Mussaenda pubescens var. pubescens and M. pubescence var. alba,the relationships between the morphological differentiation and environmental adaptation were elucidated. Our observations indicated that the occurrence of M. pubescens var. aLba was related to the sympatric distribution of M. erosa ,which has yellow flowers and thus compete with M. pubescence var. pubescens for the same pollinators. Our studies suggested that/VL erosa and M. pubescens var. pubescens share the same Lepidoptera pollinators,while the effective pollinators of/VL pubescens vat. alba are Hymenoptera. Primary conclusions could be drawn that the emergence of .M. pubescens vat. alba is a phenomenon of reproductive character displacement.

关 键 词：性状置换 玉叶金花属 传粉者转移 竞争传粉者 

分 类 号：Q949[生物学—植物学]