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李艳红, 王琼. 红雉凤仙花结籽的花粉限制[J]. 四川林业科技, 2014, 35(4): 17-22. DOI: 10.16779/j.cnki.1003-5508.2014.04.004
引用本文: 李艳红, 王琼. 红雉凤仙花结籽的花粉限制[J]. 四川林业科技, 2014, 35(4): 17-22. DOI: 10.16779/j.cnki.1003-5508.2014.04.004
LI Yan-hong, WANG Qiong. Pollen Limitation of the Seed Setting of Impatiens oxyanthera[J]. Journal of Sichuan Forestry Science and Technology, 2014, 35(4): 17-22. DOI: 10.16779/j.cnki.1003-5508.2014.04.004
Citation: LI Yan-hong, WANG Qiong. Pollen Limitation of the Seed Setting of Impatiens oxyanthera[J]. Journal of Sichuan Forestry Science and Technology, 2014, 35(4): 17-22. DOI: 10.16779/j.cnki.1003-5508.2014.04.004

红雉凤仙花结籽的花粉限制

Pollen Limitation of the Seed Setting of Impatiens oxyanthera

  • 摘要: 生殖力是种群兴衰的主要标志。对植物生殖能力进行评估有利于了解植物的生殖特性和生殖机制,为推断物种对环境的适应能力奠定基础。通过测定红雉凤仙花主要传粉昆虫-三条熊蜂的传粉效率及进行人工补充授粉,从花粉数量和花粉来源测定红雉凤仙花结籽是否受到花粉限制。结果发现:三条熊蜂具有较高的访花效率,单次访花时三条熊蜂从雄蕊带出的花粉数量远远大于落置到柱头上的花粉数,而落置在柱头上的花粉数量又远远大于子房中的胚珠数。人工补充授粉结果显示,异株异花授粉与自然传粉的结籽率差异显著,前者使结籽率提高了约11%,同株异花授粉与自然传粉的结籽率差异不显著。结果表明:花粉来源而非花粉数量是限制红雉凤仙花结籽的主要原因之一。

     

    Abstract: The reproductive capacity is the symbol of population rise and fall. Evaluating plants' reproductive capacity is helpful in understanding the plants' reproductive characteristics and reproductive mechanism,and inferring the adaptive ability of plants in the environment. In full bloom,the determination was made on Bombus trifasciatus Smith's pollination efficiency-the main pollinator of Impatiens oxyanthera Hook. F.,the result showed that the amount of pollen taken out by Bombus trifasciatus Smith from stamen was far more than the pollwn fallen on the stigma,and the numlaer of pollen fallen on the stigma was far more than that in ovule,thus showing that the number of pollen on the stigma was sufficient. Artificial supplementary pollination experiments showed that the seed setting rate of cross-pollination and natural pollination was significantly different. The former improved the seed setting rate by about 11%,and homologous-pollination was not significant as compared with natural pollination. The result showed that under the condition of natural pollination,the number of fallen pollen on the stigma was sufficient,therefore,the pollen quality,rather than the quantity,was an important factor leading to a low seed setting rate of I. oxyanthera.

     

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