摘要
外来生物入侵是全球性的社会经济和环境问题,探索入侵机制有重要的理论和实践意义。生长和防御具有权衡关系,资源从防御向生长的再分配可能导致外来入侵植物竞争能力提高,但其内在机制并不清楚。氮分配的进化假说认为,在入侵地外来植物对天敌逃逸的进化响应是降低叶氮向防御系统分配,增加叶氮向光合机构分配,进而提高资源捕获能力和利用效率,促进入侵。
Biological invasions are serious socioeconomic and environmental problems worldwide. It is very significant in theory and practice to explore invasion mechanisms. Tradeoffs between growth and defenses have been documented in many studies. Realloeation of resources from defenses to growth may improve competitive ability of Jurasire plants. However, the intrinsie mechanisms underlying the increased competitive ability of invasive plants are not elucidated. The hypothesis of the evolution of nitrogen allocation predicts that alien plants may evolve to decrease nitrogen allocation to defenses and increase nitrogen allocation to photosynthesis in responses to enemy release in introduced ranges. The increased nitrogen allocation to photosynthesis contributes to increased resource capture ability and use efficiency, facilitating invasion success.
出处
《中国基础科学》
2009年第4期32-33,共2页
China Basic Science
基金
国家自然科学基金重点项目(30830027)
面上项目(30670394)
云南省应用基础研究计划项目(2007C107M)
关键词
外来入侵植物
氮分配
氮分配进化假说
invasive plants
nitrogen allocation
hypothesis of the evolution of nitrogen allocation
