摘要
通过对白桂木天然林的定株观测,在对其生殖物候观测基础上,从白桂木的生殖发育过程、花序结构和繁育系统方面对白桂木有性生殖过程中的濒危环节进行了研究。结果显示:白桂木属于同步发生花期植物,花粉以风媒传播。根据Dafni的标准所得出的杂交指数(OCI)为5,大于4,表明白桂木的繁育系统为异交、部分自交亲和,需要传粉者。按照Cruden的花粉-胚珠比(P/O)的标准划分,白桂木的花粉-胚珠比(P/O)约为1 248,其繁育系统属于兼性异交类型。
In this paper,studies were made of reproductive phenology and breeding system of Artocarpus hypargyreus and the results showed that its outcrossing index was 5,the breeding system was outcrossing,and a part was self-compatible and sometimes demanded pollinators.Its pollen-ovule ratio was 1 248,and it was facultative xenogamy.The gravity-glass-slice method was used to make sure its anemophily mode.Phenology observations showed that the situation of its flowering was simultaneously flowering and the form of its self-pollination was helpful to protecting the reproductive success.
出处
《四川林业科技》
2010年第3期94-96,共3页
Journal of Sichuan Forestry Science and Technology
基金
福建省林业厅科研项目"珍贵树种白桂木的驯化研究"(闽林[2001]科12-9)
关键词
白桂木
生殖物候
繁育系统
Artocarpus hypargyreus Hance
Reproductive phenology
Breeding system
