期刊
PLANT CELL AND ENVIRONMENT
卷 43, 期 3, 页码 624-636出版社
WILEY
DOI: 10.1111/pce.13685
关键词
DES1; HY1; hydrogen sulfide
资金
- European Regional Development Fund through the Agencia Estatal de Investigacion [BIO2016-76633-P]
- Chinese Natural Science Foundation [31670255]
- Natural Science Foundation of Jiangsu Province [BK20161447]
- Fundamental Research Funds for the Central Universities [KYZ201859]
Recent studies have demonstrated that hydrogen sulfide (H2S) produced through the activity of l-cysteine desulfhydrase (DES1) is an important gaseous signaling molecule in plants that could participate in abscisic acid (ABA)-induced stomatal closure. However, the coupling of the DES1/H2S signaling pathways to guard cell movement has not been thoroughly elucidated. The results presented here provide genetic evidence for a physiologically relevant signaling pathway that governs guard cell in situ DES1/H2S function in stomatal closure. We discovered that ABA-activated DES1 produces H2S in guard cells. The impaired guard cell ABA phenotype of the des1 mutant can be fully complemented when DES1/H2S function has been specifically rescued in guard cells and epidermal cells, but not mesophyll cells. This research further characterized DES1/H2S function in the regulation of LONG HYPOCOTYL1 (HY1, a member of the heme oxygenase family) signaling. ABA-induced DES1 expression and H2S production are hyper-activated in the hy1 mutant, both of which can be fully abolished by the addition of H2S scavenger. Impaired guard cell ABA phenotype of des1/hy1 can be restored by H2S donors. Taken together, this research indicated that guard cell in situ DES1 function is involved in ABA-induced stomatal closure, which also acts as a pivotal hub in regulating HY1 signaling.
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