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Título: | ABA-triggered guard cell L-cysteine desulfhydrase function and in situ hydrogen sulfide production contributes to HY1-modulated stomatal closure |
Autor: | Zhang, J.; Zhou, M.; Ge, Z., Shen, J.; Zhou, C.; Gotor, Cecilia CSIC ORCID ; Romero, Luis C. CSIC ORCID ; Duan, X.; Liu, X.; Wu, D.; Yin, X.; Xie, Y. | Palabras clave: | DES1 HY1 Hydrogen sulfide |
Fecha de publicación: | 2020 | Editor: | Blackwell Publishing | Citación: | Plant, Cell and Environment 43: 624- 636 (2020) | Resumen: | 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 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. | Versión del editor: | http://dx.doi.org/10.1002/pce.13685 | URI: | http://hdl.handle.net/10261/205094 | DOI: | 10.1002/pce.13685 | Identificadores: | doi: 10.1002/pce.13685 issn: 0140-7791 |
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PCE-19-Zhang et al.pdf | 2,81 MB | Adobe PDF | Visualizar/Abrir |
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