【作者】 谢国文；

【Author】 Xie Guowen (Department of Biology,Guangzhou Education College,Guangzhou 510030)

【机构】 广州教育学院生物系；

【摘要】 永瓣藤(Monimopetalum chinense)是卫矛科的一个单型属植物,被列为国家二级珍稀濒危保护树种。本文研究了永瓣藤的生物学特性、地理分布特征、生态和群落学特性以及珍稀濒危的原因。据笔者近年的研究结果,永瓣藤濒危的原因可概括如下:1.种子萌发障碍可能是其在自然界处于濒危状态的最重要原因之一;2.传粉受精不良,胚珠败育现象普遍,从而导致结实率偏低;3.种子成熟后胚休眠或因失水而胚失活是另一大有性生殖障碍;4.人类活动对自然生态环境的严重干扰和破坏是其致濒的主要外因。最后,本文提出了消除威胁生物多样性的社会因素、加强亚热带阔叶林生态系统的保护、重视自然保护区以外的就地保护工作、深入研究迁地保护珍稀濒危物种的有效方法等保护对策。更多还原

【Abstract】 Monimopetalum chinense is the only species of the genus Monimopetalum,a monotypic genus in the Celastraceae.This species has been under the second- class state protection.In this paper,its biological features,geographical distribution,ecological attributes and the causes of its endangerment,are investigated.The factors of its endangerment may be summarized as follows: 1) There existed some barriers of the seed germination,which seems to be one of the most important factors to cause the endangerment.2) Poor pollination and fertilization resulted in the frequent ovule abortion and low fruit - setting.3) The dormancy of the embryos after the seed maturation or their death caused by the loss of water might be.also important barriers of sexual reproduction. 4) Serious human disturbance was the major external factor to cause the endangerment. At the end of this paper,some measures are proposed for the effective protection of Monimopetalum chinense.These include decreasing human disturbance,strengthening the protection of subtropical broad-leaved forests,and attaching more importance to in situ protection outside the nature reserve.更多还原