寄生植物对寄主的选择和影响

寄生植物对寄主的选择性与寄主营养物质的含量、合成的次生物质和硬度有关．多寄主存在的条件下，有利于寄生植物的生长发育．通过改变寄主光合产物的流向和影响寄主叶片的气孔调节，寄生植物对寄主生理和形态产生显著的影响．寄生植物的存在使植物群落的生物量、组成多样性和动态发生改变．大量研究显示．寄生植物对寄主的选择和影响与植食性动物对取食植物的选择和影响有很多相似之处．气候变化对寄生植物与寄主关系影响的研究还刚刚起步，寄生植物对寄主选择和影响的研究对有害寄生植物的防除和有益寄生植物的利用有重要的价值，应该重视和加强．

Selectivity and influence of parasite plants on their hosts

More and more studies have demonstrated that parasite plants have strong selectivity on their hosts,which is correlated with nutrients,secondary metabolites and hardship.It is beneficial to the growth and development of parasite plants under multiple hosts.Parasite plants can change the direction of photosynthate flow and influence the adjustable ability of leaf stomata on their hosts.The growth and development of these hosts are dramatically influenced.Furthermore,parasite plants are able to have strong impacts on biomass,composition diversity,and fluctuation of the community in which they occurred.An increasing number of studies showed that the interactions between parasitic plants and their hosts may compare with those between herbivores and plants.The influence of climate changing on the relationships between parasite plants and their hosts is at beginning.Recently,most of parasite plants have more economical values other than harmful weeds.Therefore,researches on the relationships between parasite plants and their hosts are of significance both in theoretical and practical aspects.