植物响应铀胁迫的防御机制研究进展

Advances in Defense Mechanism of Plant Response to Uranium Stress

铀可被植物吸收并积累在其根部,高浓度铀会对植物产生毒害作用,植物已进化出一系列增强耐受铀胁迫的策略。笔者总结了植物响应铀胁迫的防御机制,包括功能区域化、植物螯合作用、抗氧化酶防御系统、铀的化学形态转化;并展望了相关的研究方向。研究结果有利于明确植物耐受铀的分子遗传基础,可为植物响应铀胁迫的相关研究提供参考。

Uranium(U)can be readily adsorbed and retained in plant roots.A high concentration of U causes phytotoxicity.Plants have evolved a number of defence strategies operate separately or cooperate with each other to alleviate U-induced phytotoxicity.The defense mechanisms of plants in response to uranium stress were summarized,including compartmentalization,chelation of plants,antioxidant system,chemical form conversion of uranium.The related research direction was also prospected.The results are helpful to clarify the molecular genetic basis of plant tolerance to uranium and provide reference for plant response to uranium stress.