Plants undergo a series of physiological, biochemical and molecular changes in response to environmental stress such as drought to survive during long terms of evolution. ABA has been implicated as a key component in the response. The rencent advances in physiological role of ABA are reviewed in this paper.%植物在长期进化中，对干旱等胁迫从生理、生化和分子水平上产生了适应性变化，从而增加逆境存活机会，在这些响应过程中，ABA起着极其重要的作用。本文介绍了近年来研究ABA在植物抗旱中生理作用方面所取得的进展。
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