植物耐重金属分子生理机制研究进展

Research advance on the physiologically molecular mechanisms for plant heavy metal tolerance

植物可以通过一系列动态的分子生理机制来减少重金属的胁迫.这些机制包括重金属离子与细胞壁的结合,限制重金属离子透过细胞膜,重金属离子或化合物的排出,重金属在植物体内的转移,重金属的络合与区隔化以及植物对胁迫的基本的反应机制如胁迫蛋白含量的变化等.本文就植物耐重金属的分子生理机制进行综述.

Plants posses homeostasis mechanisms to minimize the damage from exposure to heavy metal stress. These mechanisms involve in the binding of heavy metals to cell wall, immobilization exclusion of the plasma membrane, efflux of these toxic metal ions, reduction of heavy metal transport, compartmentalization and metal chelation by tonoplast-located transporters, expression of more general stress response mechanisms such as stress proteins. This review provides a broad overview of the molecular mechanisms involved in heavy metal detoxification and tolerance.