Role of nitric oxide and hydrogen sulfide in plant aluminum tolerance
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As gasotransmitter, nitric oxide (NO) and hydrogen sulfide (H2S) are involved in the regulation of plant tolerance to abiotic stresses. Aluminum (Al) toxicity triggers synthesis of NO and H2S and seriously affects plant growth and productivity. Exogenous NO and H2S alleviate Al toxicity in plants. However, the physiological and molecular mechanisms of NO and H2S in alleviating Al toxicity are very scattered. In this review, the advances in the effects of Al on the content of endogenous NO and H2S and the mechanisms of exogenous NO and H2S in alleviating Al toxicity in plants are summarized and discussed. The signaling pathway for the roles of NO and H2S in alleviating Al toxicity is also proposed.
KeywordsAluminum Nitric oxide Hydrogen sulfide Oxidative stress Reactive oxygen species Tolerance gene
This study was supported by grants from the National Natural Science Foundation of China (No. 31660352) and the Science and Technology Development Fund of Guangxi Academy of Agricultural Sciences (Guinongke2017JZ11 and Guinongke2017JZ21). We thank the reviewers for their helpful comments on this manuscript.
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