【摘要】 铵作为重要的氮源被植物根系吸收并同化,但是过量的铵也会对细胞造成毒害。植物必须依据外界环境和自身氮水平来严格调控根系对铵的吸收过程。铵转运蛋白介导的高亲和力铵跨质膜运输是植物根系吸收铵的主要途径,AMT基因的表达及转运活性在转录和蛋白水平等多层面被严格调控。本文对于植物铵吸收和转运机制,尤其是近5年关于蛋白水平调控的最新研究进展进行了评述。更多还原

【Abstract】 Ammonium is, besides nitrate, the most important nitrogen form being taken up and assimilated by root cells, while, over ammonium accumulation is toxic to plant cells. Thus, ammonium uptake process must be tightly controlled according to plant nitrogen status and external nitrogen availability. AMT-type ammonium transporters have been demonstrated to mediate high-affi nity ammonium uptake across the plasma membrane in roots, and AMT gene expression and its transport activities are strictly controlled on multilevel including transcription and translation levels. Here, research progress on plant ammonium uptake and transport mechanism is discussed, especially translational regulation in the recent fi ve years.更多还原