逆境胁迫下植物基因的表达与调控

探讨植物在逆境下的适应机制，综述了植物在逆境下相关基因的表达调控方式，由于植物生活的“不动性”使其不可避免地要受到各种逆境的冲击，经过系统的进化，植物本身能够建立起有效的适应乃至抗性机制。大量的研究认为，逆境胁迫下，植物体内脱落酸（ABA）和水杨酸（SA）的含量会发生明显的变化，从而诱导许多新基因表达以及蛋白质合成，来适应环境的变化。植物对环境的适应可能有两种机制。第一种机制是ABA与SA诱导核糖核酸（mRNA）的合成或使其稳定。第二机制是ABA与SA有引起逆境响应蛋白的积累和翻译调控。

Expression and Regulation of the Plant Gene Under Enviromend Stress

To investigate the adaptation mechanisms of plant gene under adversity stress.By looking up the recent literatures dealt with the plant's adaptation and response to adversity stress and reviewing previous works on the plant's adaptation mechanisms under adversity stress.Unavoidably,plant is influenced by all kinds of adversity stresses because of its immobility.But it can adapt and resist effectively to adversity stress by itself.Many researches show that under adversity stress contents of ABA and SA in the plant cells are changed apparently wiich induced many new genes expression and protein synthesis to adapt environment's change.There may be two kinds of mechanisms of the plant's adaptation to adversity stresses. 1. ABA and SA induce the synthesis of mRNA or stabilization of mRNA. 2. ABA and SA can cause the responsive proteins' accumulation and regulation after translation.