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Physiological Functions of Gasotransmitter Hydrogen Sulfide in Plant Defense Against Heavy Metals Stress
Fang Huihui, Pei Yanxi*
College of Life Science, Shanxi University, Taiyuan 030006, China
Abstract: As increased industrial wastes， sewage irrigation， chemical fertilizers and pesticides have caused excessive release of toxic metals into the environment， heavy metals (HMs) contamination of agricultural soil is becoming a serious environmental problem. Hydrogen sulfide (H2S)， an emerging gasotransmitter， has been reported to participate in plant defense against HMs stress and reduce the HMs accumulation in plants. This paper reviews recent progresses in researches pertaining to the physiological process and signal transduction mediated by H2S during plant responses to HMs stress. It will provide novel strategies for the genetic improvement of plant tolerance to HMs stress and reducing the economic risk caused by HMs contamination in cultivated soil.
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