The physiological function and molecular mechanism of hydrogen sulfide resisting abiotic stress in plants

Hydrogen sulfide (H2S) is the third gas signal molecule after nitrogen dioxide and carbon monoxide. It participates in many important daily activities in plants and can promote plant seed germination, photosynthesis and organic matter accumulation, pore movement, side rooting and delaying plant aging. In recent years, studies have shown that H2S plays an important role in plant resistance to biological and abiotic stress. This article introduces the anabolic pathway of H2S in plants and the important functions of H2S in relieving plant stress from heavy metals, high salinity, low oxygen, drought, high and low temperature, and summarizes the research advances on the mechanism of resistance. At the same time, the interaction and the potential molecular mechanism between H2S and other signaling molecules are discussed, which should provide a theoretical reference for future in-depth research on the mechanism of action of H2S.