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.