摘要
对小桐子Jatropha curcas访花昆虫种类与访花行为、花粉活力、交配系统等试验观测的结果表明:该植物的访花昆虫有17种,其中11种为有效传粉昆虫,主要传粉者为意大利蜂Apis mellifera、中华蜜蜂Apis cerana和迁粉蝶Catopsilia pomona,昆虫访花高峰每天有2次,第1次于花开后2 h(10:00—12:00)左右,第2次为16:00—17:00;花刚开放花粉就具有较高的活力,5 d以后还可达37.11%;柱头于开花当日便具有可授性,可授期可延续到花后6 d左右;人工自花和异花授粉的结果率分别为87.93%和86.66%,明显高于自然传粉的结果率,去雄后自然传粉的结果率为68.28%,明显低于自然条件下的结果率,表明小桐子不存在自交不亲和,但具有异花传粉的倾向,其结果率高低与柱头接受到的花粉数量有一定的相关性.
Pollination biology of Jatropha curcas （Euphorbiaceae） was studied by recording floral visitor species and their behavior, fruit set and seed production, visiting frequency and duration. The results showed that 17 species of floral visitors were recorded during the observation period and 11 species of them were pollinators. Apis mellifera, Apis cerana and Catopsilia pomona were the most effective pollina- tors due to their higher visiting frequencies. There were two floral visiting peaks at 10：00--12：00 and 16：00--17：00 in everyday. The pollen activities of flowers had 5-6 d. The fruit sets of artificial self-pollination, artificial cross-pollination and natural pollination were 87.93%, 86. 66% and 76. 42%, respectively, which indicated Jatropha curcas was self-compatible and tended to cross-pollination.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2007年第3期62-66,共5页
Journal of South China Agricultural University
基金
中国科学院方向性项目"能源植物资源筛选评价与小桐子规模化种植关键技术研究"(KSCX2-YW-G-027)
中国科学院"西部之光"人才培养项目"能源植物小桐子育种与高产栽培研究"
关键词
小桐子
繁殖生物学
访花机制
花粉活力
柱头可授性
交配系统
Jatropha curcas
pollination biology
floral visiting mechanism
pollen activity
stigma receptivity
mating system
作者简介
杨清（1969-），男，副研究员，博士研究生；
通讯作者：孙启祥（1964-），男，研究员，博士，E-mail：sunqixiang@263.net
