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珍稀濒危物种格木传粉方式和交配系统的初步研究

ISSN号：1005-3395
期刊名称：《热带亚热带植物学报》
时间：0
分类：Q945.6[生物学—植物学]
作者机构：[1]中国科学院华南植物园,中国科学院退化生态系统植被恢复与管理重点实验室,广州510650, [2]中国科学院华南植物园,数字化植物园广东重点实验室,广州510650, [3]中国科学院大学,北京100049, [4]DepartmentofForestandEcosystemScience,UniversityofMelbourne,Creswick,V1C3363,Australia
相关基金：Supported by National Basic Research Program of China （973 Program）（2007CB411600）, the Knowledge Innovation Project of The National KeyTechnology Rand D Program （2008BAC39B02）, the Chinese Forest Biodiversity Monitoring Network and the Foreign ExchangeProgram National Founder （31011120470）

作者：朱鹏[1,2,3], 王峥峰[1,2], 叶万辉[1,2], 曹洪麟[1,2], Saravanan THAVAMANIKUMAR

关键词：格木, 传粉方式, 交配系统, 遗传分析, Erythrophleum fordii Pollination Mating system Genetic analysis

中文摘要：

为研究格木（Erythrophleum fordii Oliv.）的传粉方式和交配系统,在鼎湖山国家级自然保护区对珍稀濒危树种格木进行野外观察, 花的微器官（花粉和柱头）用扫描电镜观察,并进行控制授粉实验和遗传分析。结果表明,格木具有颜色亮丽和散发香味的总状花序,格木花粉包被厚重的粘性物质,柱头没有易于捕获花粉的结构,风媒传粉没有坐果,推断格木应该是通过虫媒传播花粉,或者主要是通过虫媒传播。遗传分析和在不同繁殖环境的两棵目标树的坐果情况表明,格木偶尔可以自交产生后代,但异交占据着绝对的优势,鼎湖山格木种群的异交率达到90.6%。格木传粉方式和交配系统的研究有利于对格木进行保护和保育。

英文摘要：

Although a few efforts have been taken to conserve rare and endangered species Erythropleum fordii Olive., information about its pollination and mating system still remains unknown. The pollination and mating system of E. fordii through performing the field observation, SEM observation of pollen and stigma, controlled pollination experiment and genetic analyses in Dinghushan Nature Reserve, China were studied. Erythrophleum fordii has brightly colorful inflorescences and sends forth delicate odor, its pollen is coated by strong mucous substance and its stigmas have not specific structure for pollen capturing, and meanwhile the inflorescences pollinated by wind did not fruit at all, therefore it was inferred that E. fordii might be entomophilous. According to genetic analyses and fruiting of two object trees under contrasting reproductive situations, E. fordii can be selfing occasionally but out-crossing is dominant with out-crossing rate in the Dinghushan E. fordii community for 90.6%. This preliminary elucidation of pollination and mating system would benefit the conservation of E. fordii.

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