亮叶蜡梅的传粉生物学初步研究

 对南京地区引种处于半自然状态的亮叶蜡梅进行了花期物候、访问昆虫种类、访问行为及访花频率等进行观察，同时对其花粉活力、柱头可受期、花粉胚珠比(P／O)及繁育系统进行了检测。初步研究结果表明：亮叶蜡梅为虫媒植物，甲虫类是其主要的访问昆虫；其P／O比值属于兼性异交类型；在静风天气条件下，风媒传粉作用可以忽略。

Pollination Biology of Chimonanthus nitens Oliv

Chimonanthus nitens Oliv. (Calycanthuaceae) is an evergreen shrub, with high ornamental value, naturally distributed in the northern subtropical area of Yangtze River. This study was done in late autumn of 2002 in Nanjing Botanical Garden, to evaluate the pollination biology of C. nitens Oliv. The pollination charac- teristics including flowering phenology, flowering pattern, species of insects, visitation rate of visitors and their foraging behavior were investigated, and pollen viability, stigma receptiblity pollen-ovule ratio (P/O) and breeding system were also studied. The results show that C. nitens Oliv. is an anthophilows species; its breeding system is facultative hybridization, as the P/0 is about 1 190 according to Cruden (1977). The effect of the wind to spreading pollen is little, and beetles are its main visitors which can cause self-fertilization, scarcely any bees and flies.