渗透胁迫下植物细胞脱落酸的信号转导途径研究进展

Research advance on signal transduction pathway induced by ABA in plants under osmotic stress

植物生长和农业生产易受到病菌侵染和非生物胁迫(如干旱、盐渍)的危害。脱落酸(ABA)是一种重要的逆境植物激素,在应对这些逆境的代谢调控中占有非常重要的地位。随着当前生态环境的恶化,了解ABA信号转导机制对于改善植物生产具有重要意义。PYR/PYL/RCAR-PP2C-SnRK2蛋白复合体等脱落酸受体研究,以及ABA信号转导途径介导渗透胁迫下许多生理反应,如组蛋白的修饰、活性氧的形成、Ca2+的释放等研究均取得重要成果,并成为国内外的研究热点。本文对近年来与此相关的研究进展进行了综述,以期为了解ABA在植物耐逆性中的作用提供参考。

Plant growth and agriculture productivity are continuously challenged by pathogen attack and abiotic stress such as drought and salinity. Abseisie acid （ ABA）, as an important plant hormone, plays an essential role in plant adaptation to osmotic stress induced by drought, high salinity and so on. With the deterioration of the ecological environment, understanding ABA signal transduction pathway is significant for improving plant performance in the future. Breakthroughs in the field the ABA receptors of pYR/PYL/ RCAR-PP2C-SnRK2, and the ABA signal transduction leading to many physiological responses like histone modification ,formation of reactive oxygen species and releasing Ca2＋ from cellular stores, were stated well in several literatures, and have gradually become a hot research. In the present article, we summarized it with recent related literatures. Our review should provide reference for studies of ABA function played in plant resistance.