土壤和水体的重金属污染已严重危害人类生存环境与健康。由于受重金属污染的环境分布广泛,迫切需要开发经济的清除环境重金属的技术。植物修复是通过绿色植物降解或移除环境污染物,有望成为重金属污染环境的原位修复技术。植物内生菌是指定殖于健康植物的各种组织和器官内部的细菌,被感染的宿主植物不表现出外在病症,耐重金属的内生菌在多种超富集植物中存在。在植物修复过程中,野生型内生菌或基因工程内生菌的抗性系统能降低重金属植物毒性,促进其迁移金属。耐重金属内生菌还可以通过固氮、溶解矿物元素及产生类植物激素、铁载体和ACC脱氨酶等产物促进植物的生长。主要综述目前植物-内生菌相互作用及其潜在的促进植物修复重金属污染的研究进展。Pollution of soils and water with heavy metals is becoming one of the most severe environ-mental and human health hazards.Innovative ways are pressed for cleaning widespread heavy metals contamination.Phytoremediation is a remediation technology that requires the use of green plants to remove pollutants from the environment.Endophytic bacteria colonize within plant hosts without caus-ing symptoms of infection or negative effects.The metal resistant endophytes are present in various hyperccumulatorplants.During phytoremediation of metals,the wild-type or engineered endophytes can lower metal phytotoxicity and enhance heavy metal translocation to plant through its metal-resistance system.Moreover,the metal resirtant endophytes can indirectly benefit plant growth by various mecha-nisms such as nitrogen fixation,solubilization of minerals production of phytohormines,siderophors,1-aminocyclopropane-1-carboxylate(ACC) deaminase.This review describes the potential for exploit-ing plant-endophyte pertnerships to improve phytoremediation of heavy metals.国家自然科学基金项目(No.31070296);福建省高校服务海西建设重点项目(No.A102
