Stomatal regulation:Role of H2S-induced persulfidation in ABA signaling

• 作者: Anna Siodmak Heribert Hirt
• 来源期刊: 分子植物（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: Spotlights
• 页码范围: 858-860
• 页数: 3页
• 语种: 英文

摘要

Hydrogen sulfide(H2S)is an important signaling molecule in plants.It is a small gasotransmitter with high permeativity through lipid membranes.H2S can convert the mercapto groups(Cys-SH)of the amino acid cysteine into hydropersulfide groups(-Cys-SSH).This process is called persulfidation.Post-translational modifications such as persulfidation can play an important role in protein functionality,altering protein conforma-tion and/or activity.In plants,H2S can be generated within guard cells by CYSTEINE-DESULFHYDRASES,such as DES1,by degradation of cysteines into H2S,ammonia,and pyruvate(Zhang et al.,2020).H2S was reported to take part in physiological processes,such as stress response,and in the regulation of the functions of phytohormones such as salicylic acid and abscisic acid(ABA)(Pandey and Gautam,2020).Although the mechanism of how H2S affects ABA signaling pathways is not well understood,two recent studies by Chen et al.(2020)and Zhou et al.(2021)shed light on this topic,reporting how H2S-induced persulfidation regulates the stomatal ABA signaling pathway.