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明党参的濒危机制及其保护对策的研究
引用本文:邱英雄,傅承新.明党参的濒危机制及其保护对策的研究[J].生物多样性,2001,9(2):151-156.
作者姓名:邱英雄  傅承新
作者单位:浙江大学生命科学学院
基金项目:国家重点基础研究发展规划项目(State Key Basic Research and Development Plan of china G2000046806),浙江省自然科学基金资助项目(No.397234)
摘    要:本文对明党参的资源状况、种群生态、种子结构、植株结构实率与环境的关系及传粉生物学等方面进行了研究。从种子形态及分子水平对明党参的遗传多样性和遗传结构进行了分析。研究结果表明,明党参种子后熟阶段与梅雨气候的不协调是导致种子萌发率低及更新种群少的主要原因之一;人类活动破坏了明党参的适宜生境和种群数量,使得种群间基因流减小,进而导致严重的遗传漂变及种群间的分化。由此提出了对明常参就地和迁地保护的有效措施。

关 键 词:明党参  稀有植物  种群生态  传粉生物学  遗传多样性
文章编号:1005-0094(2001)02-0151-06
收稿时间:2000-7-10
修稿时间:2000年7月10日

Studies on the endangerment mechanism of and conservation strategies for Changium smyrnioides
QIU Ying-Xiong,FU Cheng-xin.Studies on the endangerment mechanism of and conservation strategies for Changium smyrnioides[J].Biodiversity Science,2001,9(2):151-156.
Authors:QIU Ying-Xiong  FU Cheng-xin
Affiliation:QIU Ying Xiong,FU Cheng Xin Laboratory of Systematic and Evolutionary Botany and Biodiversity,College of Life Sciences,Zhejiang University,Hangzhou 310029
Abstract:The resource, the population ecology, structure and characters of seeds, pollination biology and the relationship between plumpness of seeds and environment were investigated in the rare plant Changium smyrnioides . The genetic diversity and genetic structure of the species were analysed by morphological characters of seeds, starch gel electrophoresis and RAPD analysis. The studies revealed lack of coordination between the ripening of the seeds and the season of East China, which resulted in low ratio of seed germination and low rate of population renewal. As human activity has destroyed and disturbed suitable habitat for the species, the range of each population has decreased and the habitat has become fragmented which has decreased gene flow between populations ( Nm <1.0). The low gene flow suggests that genetic drift may play a prominent role in shaping the present day genetic composition. Based on these results, some management strategies are proposed for protecting this species effectively.
Keywords:Changium smyrnioides    rare plant  population ecology  pollination biology  genetic diversity
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