摘要
研究驼绒藜属 3种植物开花规律、开花日动态、结实率及柱头微形态。结果表明 ,华北驼绒藜和驼绒藜雄花开花高峰均在上午 8:0 0～ 10 :0 0 ,有利于传粉和受精 ,而北美驼绒藜雄花在中午 11:0 0～ 13:0 0达开放高峰 ,其雌雄花开花高峰期不一致 ,不利于传粉、受精 ,从而降低结实率。三者的开花最适温度基本一致 ,都在2 0～ 2 4℃。三者的雌花均在下午 14 :0 0左右达到开放高峰。雌花柱头微形态研究结果表明 ,华北驼绒藜的柱头有利于接受花粉 ,而北美驼绒藜的柱头不利于接受花粉。此外 ,华北驼绒藜与驼绒藜的雌、雄花花期相遇结实率较高 ,而北美驼绒藜因花期不遇 ,故导致结实率低。
A study of 3 Ceratoides species for their flowering habit, daily flowering dynamic change, fertility, and stigma micromorphology shows that the male flowers of C.arborescens and C.latens reach their full bloom at 8:00-10:00, while the male flowering peak of C.lanata falls on 11:00-13:00. The bloom peak of the female flowers of all 3 occur at 14:00. Though the most congenial temperature for flowering of all the 3 species is 20～24℃, the female stigma micromorphology of C.arborescens is best suited for gathering pollen than the other 2 species. Therefore, C.arborescens boasts the highest seed bearing rate. Moreover, the flowering period of C.arborescens and C.latens last longer than that of C.lanata , a fact which also results in the highest seed bearing rate of C.arborescens, and the lowest seed bearing rate of C.lanata .
出处
《草地学报》
CAS
CSCD
2003年第2期120-124,共5页
Acta Agrestia Sinica
基金
国家自然科学基金"驼绒藜牧草种子生物学特性的研究"( C3 9960 0 10 )资助
