外来入侵植物喜旱莲子草的研究进展

Progress in studies on the exotic invasive plant alligator weed Alternanthera philoxeroides(Mart.) Griseb

喜旱莲子草已经成为我国的恶性入侵杂草.本文从喜旱莲子草的自身繁殖特性、生理生态适应性、群落内的种间关系、遗传多样性及其防治研究等方面综述近年来的研究现状,同时针对目前研究中存在的问题探讨今后喜旱莲子草研究的发展方向.大量的研究表明,喜旱莲子草的繁殖特性可能是影响它入侵的主要因子.但在入侵过程中它对各种环境的适应性是极为多样的,有可能是多方面的综合因素决定了其入侵的成功.

Alligator weed, Alternanthera philoxeroides （ Mart. ） Griseb. has been declared as one of the worst invasive weeds in China. Recent progress in the studies on the exotic plant alligator weed was reviewed including the following aspects, such as its reproductive characteristics, eco -physiological strategies, interactions among alligator weed and its new neighbors, the genetic diversity and control strategies. In the present paper, the coming tendency about alligator weed has been discussed according to recent studies and unsolved vague points in this field. Based on recent studies, the reproductive characteristic of alligator weed would be probably the key factor that affected the invasions. Analysis also showed that alligator weed adapted well to different environments, and therefore it was possible that interactions of many aspects decided whether alligator weed could invade other habitats successfully or not.