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• W3205064462 abstract "Abstract Hydrogen sulfide (H 2 S) has been witnessed as a crucial gasotransmitter involving in various physiological processes in plants. H 2 S signaling has been reported to involve in regulating seed germination, but the underlying mechanism remains poorly understood. Here, we found that endogenous H 2 S production was activated in germinating Arabidopsis seeds, correlating with upregulated both the transcription and the activity of enzymes (LCD and DES1) responsible for H 2 S production. Moreover, NaHS (the H 2 S donor) fumigation significantly accelerated seed germination, while H 2 S-generation defective ( lcd/des1 ) seeds exhibited decreased germination speed. Further results indicated that the alternative oxidase (AOX), a cyanide-insensitive terminal oxidase, can be stimulated by imbibition, and the expression of AOX genes was provoked lag behind H 2 S production during germination. Additionally, exogenous H 2 S fumigation significantly reinforced imbibition induced enhancement of AOX1A expression, and mediated post-translational modification to keep AOX in its reduced and active state, which mainly involved H 2 S induced increase of the GSH/GSSG ratio and the cell reducing power. Consequently, H 2 S signaling acts as a trigger to induce AOX mediated cyanide-resistant respiration to accelerate seed germination. Our study correlates H 2 S signaling to cyanide metabolism, which also participates in endogenous H 2 S generation, providing evidence for more extensive studies of H 2 S signaling. Highlight Gasotransmitter H 2 S provokes AOX mediated cyanide-resistant respiration, mainly through both long-term (up-regulating AOX1A expression) and short-term (inducing post-translational activation of AOX) regulatory modes, to accelerate seed germination." @default.
• W3205064462 created "2021-10-25" @default.
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• W3205064462 date "2021-10-14" @default.
• W3205064462 modified "2023-09-26" @default.
• W3205064462 title "Gasotransmitter H₂S accelerates seed germination via activating AOX mediated cyanide-resistant respiration pathway" @default.
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• W3205064462 doi "https://doi.org/10.1101/2021.10.13.464324" @default.
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