植物响应金属胁迫重要蛋白质的细胞定位

Cellular Localization of Proteins in Plant in Response to Heavy Metals

土壤中的Hg2+、Pb2+、Cd2+、Cu2+、Zn2+、Mn2+、Fe2+/Fe3+等金属离子对植物体具有毒害作用。植物体通过定位于细胞壁、细胞膜,以及各种细胞器中的蛋白质应答重金属胁迫过程。植物体利用细胞壁蛋白质与重金属离子络合,细胞膜系统的转运蛋白与通道调节金属离子运输、细胞器或细胞质基质中的分子伴侣帮助蛋白质折叠等机制完成抑制金属离子进入体内或在体内的解毒等过程。综述了近年来植物响应金属离子胁迫重要蛋白质的细胞定位与作用机制。

Contamination of soils by Hg^2＋ , Pb^2＋ , Cd^2＋, Cu^2＋ , Zn^2＋ , Mn^2＋ , Fe^2＋/ Fe^2＋ and other metal ions has great toxic effects on the plant. However, the plants are in respond to heavy metal stress through the specific proteins ,which are located in the cell wall, plasma membrane, and other various organelles. The proteins related to cell wall can combined with some metal ions, and the trans- membrane proteins control the ions transporting the across the plasma membrane. In addition, the molecular chaperones located in cytoplasm matrix and organelle help protein folding in responds to heavy metal ions. This paper reviewed the cellular localization and mechanism of the protein participating in that plant responding to metal stress.