摘要
H_2S是近年来确认的植物气态信号分子,内源H_2S介导了乙烯和ABA等激素诱导气孔关闭的过程,参与植物对盐、干旱及重金属胁迫等多种非生物逆境的应答过程。H_2S与Ca^(2+)、H_2O_2和NO等信号分子相互作用调节气孔运动;外源H_2S通过调节抗氧化酶活性及其基因表达,促进脯氨酸等渗透调节物质积累,提高植物的抗逆性。就近年来有关植物体内H_2S的来源,其在气孔运动调控和胁迫应答中的作用及机制进行阐述。
Hydrogen sulfide（H2S）,a recently characterized gaseous signal molecule,mediates stomatal closure induced by abscisic acid（ABA）,ethylene（ETH）etc.,and participates in plant responses to adverse environmental stresses such as salt,drought and heavy metal stresses. H2S interacts with Ca^2＋,H2O2 and nitric oxide（NO）signal molecules in regulation of stomatal movement. Exogenous H2S improves the resistance to diverse stresses by increasing antioxidant enzyme activity,up-regulating gene expression,and promoting accumulation of compatible substances such as proline and soluble sugars in plants. In this paper,the latest research progresses in the functions and molecular mechanisms of H2S in the regulation of stomatal movement and response to diverse stresses are summarized and discussed.
出处
《生物技术通报》
CAS
CSCD
北大核心
2016年第10期18-26,共9页
Biotechnology Bulletin
基金
国家自然科学基金项目(31572107
31170237)
关键词
H2S
气孔运动
逆境响应
信号转导
H2S
stomatal movement
stress response
signal transduction
