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• 研究报告 • 上一篇    

野慈姑花粉限制评估的影响因素

覃道凤1,李婷1,戴璨1,2,3**   

  1. (1湖北大学资源环境学院, 武汉 430062; 2湖北省生物资源绿色转化协同创新中心, 武汉 430062; 3区域开发与环境响应湖北省重点实验室,  武汉 430062)
  • 出版日期:2015-12-18 发布日期:2015-12-18

Factors affecting the estimation of pollen limitation in Sagittaria trifolia.

QIN Dao-feng1, LI Ting1, DAI Can1,2,3   

  1. 1School of Resources and Environmental Science, Hubei University, Wuhan 430062, China; 2Hubei Collaborative Innovation Center for Green Transformation of BioResources, Wuhan 430062, China; 3Hubei Province Key Laboratory of Regional Development and Environmental Response,  Wuhan 430062, China)
  • Online:2015-12-18 Published:2015-12-18

摘要: 以野慈姑为材料,研究补充授粉的处理水平(单花、花序)和花粉质量(自花花粉、异花花粉)对花粉限制评估的影响.结果表明: 补充授粉的处理水平会造成花粉限制的程度不同(P=0.0021),单花水平的授粉会导致花朵之间的资源重新分配,从而影响结实;补充授粉的花粉质量会对结实造成影响,补充异花花粉比自花花粉能产生更多的种子(P=0.0497),且萌芽率更高(P=0.0428),表明该体系的花粉限制不是数量的限制,而是优质花粉的限制.不同的试验水平和花粉质量可能对花粉限制的评估造成影响,相关研究应尽量对整个花序或者植株进行补充授粉,材料允许时还应考虑自异花粉的对比试验,有利于更客观地认识和检测花粉限制.

Abstract: This study explored whether the degree of pollen limitation was affected by the experimental level (a single flower or inflorescence) and pollen quality (selfpollen or outcrosspollen) of supplemental pollination in Sagittaria trifolia. The results showed that the experimental level caused varying degree of pollen limitation. Compared with the inflorescence level, pollination at the single flower level led to a redistribution of resources among flowers, therefore affecting seed numbers. Pollen quality also played a vital role in the estimation of pollen limitation. Compared with selfpollen, supplemental pollination with outcrosspollen resulted in significantly more seeds and a higher germination rate. This proved that in the research system the reproduction was limited by pollen quality rather than quantity. Our study revealed that both experimental level and pollen quality had effects on the estimation of pollen limitation. It was suggested that in future studies we should evaluate pollen limitation at the inflorescence or whole plant level, and also consider comparing self and outcrosspollen when applicable.