Abstract
Heavy metals are a class of pollutants that may produce certainly toxic actions towards plants,plants have evolved mechanisms of heavy metal stress tolerance in long-term evolution. Based on plant heavy metal tolerance,making a brief overview that the study of tolerance mechanisms of plant response to heavy metal stress at home and abroad in recent years. The molecular mechanism that stress effects of heavy metals on plants,plant antioxidant systems,osmotic adjustment substance including proline,soluble sugar or protein, and different types of gene families under heavy metal are mainly discussed. In order to improve the ability of plant resistance to heavy metals and help phytoremediation.
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