膜离子转运蛋白对植物盐适应能力的调节机制  

Regulatory Mechanism of Ions Transporters on Salt Adaptation in Plants

作　　者：高永生[1] 陈集双[1] 

机构地区：[1]浙江理工大学生物工程研究所

出　　处：《科技通报》2005年第6期683-688,共6页Bulletin of Science and Technology

基　　金：国家自然科学基金(No30270744);中国博士后基金(No108000-X90406)资助

摘　　要：细胞质是生理生化反应的集中部位,植物的正常生长发育需要维持胞质内离子的相对稳态。盐胁迫对植物生长发育的主要危害表现为Na+在胞质中的大量累积所造成的细胞生理生化代谢过程的抑制以及胞质内离子平衡的破坏。细胞质维持K+/Na+比相对恒定的能力是植物盐适应的决定因素之一,这种能力主要通过膜转运蛋白介导的吸K+拒Na+的选择性吸收、离子外排和区域化等过程来实现。在本文中,作者就膜离子转运蛋白对植物盐适应能力的调节机制作了综述性讨论。Most plant physiological and biochemical reactions occur on the region of cytoplasm. The relative equilibrium condition of various ions in plant cells is necessary to the plant normal growth and development. Physiological metabolism could be inhibited by the accumulation of Na^＋, and destroying of the equilibrium of ions under salt stress. Maintaining a constant K^＋/Na^＋ ratio is the necessary condition of plant adapting salt stress. The consequence is caused by a lot of physiological processes including the selectivity for K^＋ over Na^＋, the efflux and exclusion of Na^＋, and compartmentalization of ions, which are achieved by transport proteins in plasma membrane. Regulatory mechanisms of ions transporters on salt adaptation in plants will be discussed in this paper.

关 键 词：植物转运蛋白 盐适应 离子转运 区域化 离子平衡 逆向转运 

分 类 号：Q945.78[生物学—植物学]