北京林业大学学报2011，Vol.33Issue(4)：63-69,7.
广玉兰开花动态与雌雄异熟机制的研究
Flowering dynamics and dichogamous mechanism in Magnolia grandiflora
摘要
Abstract
Through field investigation, we studied the flowering dynamics, pollen viability, stigma receptivity and dichogamous mechanism of Magnolia grandiflora by bagged artificial pollination, thiazolyl blue （MTT） dyeing, stigma tabletting and other methods. The results showed that： 1） during the five-six days flowering period of an individual flower, two-times opening-closure flowering was observed; 2） Pollen viability decreased over flowering stage, and the optimal pollination period was in the first opening stage when the stigmas were receptive to xenogamous, geitonogamous and self pollinations ; 3） After selfpollinating, self-incompatibility did not appear on the stigma surface nor in the styles, and fruits and seeds could be set, indicating that M. grandiflora is self-compatible to some degree; 4） From the perspective of reproduction, we infer that subgenus Yulania is more primitive than subgenus Magnolia; 5） Protogyny in M. grandiflora lies in a mechanism that determines the anther dehiscence stage, thus reducing self-pollination and interference between pollen and stigmas.关键词
广玉兰/开花动态/柱头可授性/雌雄异熟/进化关系Key words
Magnolia grandiflora/flowering dynamics/stigma receptivity/dichogamy/evolutionaryrelationship分类
农业科技引用本文复制引用
孟希,王若涵,谢磊,龙茹,牟淑琳,张志翔..广玉兰开花动态与雌雄异熟机制的研究[J].北京林业大学学报,2011,33(4):63-69,7.基金项目
北京林业大学新进教师科研启动基金项目（2010BLX02）、北京林业大学科技创新计划项目（HJ2010-23）、教育部博士点基金项目（200800220007）. （）
