COMPARISON BETWEEN CLEISTOGAMY AND CHASMOGAMY IN PERENNIAL HERB VIOLA YEDOENSIS (VIOLACEAE)
Differences in production, fruit set and seed quality between chasmogamous and cleistogamous flower are investigated in a disturbed population of the perennial herb Viola yedoensis in Beijing. Chasmogamous flower blooms in early March and is pollinator-attractive with 5 stamens. Cleistogamous flower is produced in early April, has 2 stamens and is adaptive to cleistogamy due to tight touch between anthers and stigma. In the disturbed habitat, plants tend to produce more cleistogamous flowers and fewer chasmogamous flowers. Cleistogamy have a higher fruit set than chasmogamy. Therefore, most of the seeds are produced by cleistogamy. But, chasmogamy produce bigger seeds and hence maybe have a greater probability of seedling surviving than cleistogamy. It seems that cleistogamous flower may allow the plant to reproduce and assure some seed set even in conditions of unfavorable habitat. Chasmogamy sire outcrossing seeds to adaptive new habitats.
国家科技期刊平台
NSTL
万方数据
维普
