认识长期低剂量持续污染对植物生态性能的跨代影响及其遗传特征变化，是理解全球污染条件下植物适应能力、生存潜能及进化前途的重要切入点。本项目以经历重金属持续污染不同世代长度的野生植物曼陀罗和栽培植物蚕豆为研究对象，分析持续污染条件下植物在资源获取与配置、繁殖能力等生态性能的跨代变化，同步研究持续经历污染世代长度不同的植物种群遗传多样性变化特征，通过集成分析和整合研究，揭示经历长期持续污染时的植物“资源配置变化→繁殖环节的资源减少→后代种子的数量与质量下降→种群遗传流失和遗传结构变化”的跨代生态过程，探索长期污染条件下植物生态性能变化与遗传流失之间的关系特征和生态机理，为进一步研究全球污染对植物生存能力和发展前途的影响提供理论支持和实证资料。

Understanding of ecological performance and genetic variation across different generations of plants under chronic low level pollutions is key to recognize the impacts of global pollution on plant adaptation capacity, survival potential and evolutionary fate when globalized pollutions have formed new environments that all organisms have to face up. This program will focus on the research of resource acquisition and allocation, and its underlying ecological performance of among-generation in plants Vicia faba and Datura stramonium exposed to chronic toxic metal pollution through investigation of absorption and ultilization of water, nutriental elements and photosynthesis ability, and the genetic erosion is to be assessed by molecular genetic markers among the generations of experimental populations of plants experienced with chronic toxic heavy metal stress. By comprison of the response norms between ecological performance and genetic erosion of across mutiple generation, it is supposed to figure out the ecological process “change of resource allocation → resource decrease in reproduction → quality and quantity of seed production → loss of genetic contribution of lost individuals →genetic erosion in next generations”, and some contribution to further investigation of the adaptation potential and evolutionary fate of plants under long-termed global pollution will be made through this research.