生物多样性 ›› 2001, Vol. 09 ›› Issue (2): 151-156.doi: 10.17520/biods.2001023

• 论文 • 上一篇    下一篇

明党参的濒危机制及其保护对策的研究

邱英雄, 傅承新   

  1. (浙江大学生命科学学院系统进化植物学与生物多样性实验室,  杭州 310029)
  • 收稿日期:2000-07-10 修回日期:2001-02-13 出版日期:2001-05-20
  • 通讯作者: 邱英雄

Studies on the endangerment mechanism of and conservation strategies for Changium smyrnioides

QIU Ying-Xiong, FU Cheng-Xin   

  1. Laboratory of Systematic and Evolutionary Botany and Biodiversity , College of Life Sciences , Zhejiang University , Hangzhou  310029
  • Received:2000-07-10 Revised:2001-02-13 Online:2001-05-20
  • Contact: QIU Ying-Xiong

本文对明党参的资源状况、种群生态、种子结构、植株结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。由此提出了对明党参就地和迁地保护的有效措施 。

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 elect rophoresis 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 dest royed and disturbed suitable habitat for the species , the range of each population has decreased and the habitat has become f ragmented 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 result s , some management st rategies are proposed for protecting this species effectively.

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