硫化氢信号与其它信号交互作用调控植物的耐旱性

Crosstalk Between Hydrogen Sulfide Signal and Other Signals Regulates Drought Tolerance of Plants

硫化氢(H_2S)是继一氧化碳(CO)和一氧化氮(NO)后植物体内发现的第三种气体信号分子,参与种子萌发、植物生长发育及耐逆性的获得等生理过程。干旱是限制作物产量的最主要的环境胁迫因子。近年来,H_2S也已被证实参与植物耐旱性的形成。结合最新的研究进展,在讨论H_2S信号与其它信号分子如活性氧(ROS)、NO、CO、脱落酸(ABA)、乙烯(ETH)、micro RNAs等交互作用的基础上,从气孔运动、渗透调节物质、抗氧化系统、甲基乙二醛脱毒系统、热激蛋白等方面,综述了H_2S诱导植物耐旱性形成的可能机理,并提出了未来的研究方向。进一步拓展了H_2S信号的生理功能和植物耐旱性形成的机理,对深入研究H_2S与植物耐逆性包括耐旱性的关系,具有重要的指导意义。

Hydrogen sulfide（H_2S）is found to be the third gaseous signal molecule after carbon monoxide（CO）and nitric oxide（NO）in plants,which involves in many physiological processes such as seed germination,plant growth and development,and the acquisition ofstress tolerance. Drought stress is the major environmental stress factor that limits crop plant yield. Recently,the fact that H_2S involves in theformation of drought tolerance also has been identified in various plant species. Based on the current progress in H_2S field,crosstalk between H_2S signal and other signals,such as reactive oxygen species（ROS）,NO,CO,abscisic acid（ABA）,ethylene（ETH）,and micro RNAsis discussed. Further,the possible mechanisms of H_2S inducing the formation of drought tolerance are summarized from the following aspectsof stomata movement,osmolytes,antioxidant system,methylglyoxal detoxification system,and heat shock proteins（HSPs）;moreover,the future research direction is presented. This review further expanded the possible physiological functions of H_2S signal and the formationmechanism of drought tolerance,which is of significance to deeply understand the relationship between H_2S and stress tolerance includingdrought tolerance in plants.