摘要
H2S 是近年来确认的植物气态信号分子，内源 H2S 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。H2S 与 Ca2+、H2O2和 NO 等信号分子相互作用调节气孔运动；外源 H2S 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 H2S 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。
Abstract
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 Ca2+,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.
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