ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
A GLUTAMATE CYSTEINE LIGASE Gene StGSH1 Regulated by StERF10 Enhanced Glutathione Accumulation and Adaptation to Low Phosphorus Stress in Potato.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- A GLUTAMATE CYSTEINE LIGASE Gene StGSH1 Regulated by StERF10 Enhanced Glutathione Accumulation and Adaptation to Low Phosphorus Stress in Potato.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
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10 authors.
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Abstract
Potato (Solanum tuberosum L.) is a staple global food crop whose growth is constrained by soil phosphorus deficiency. While glutathione (GSH) modulates abiotic stress responses, its precise function and regulation in potato adaptation to low-phosphorus (LP) remains undefined. This study demonstrated that LP triggers GSH accumulation by up-regulating GLUTAMATE-CYSTEINE LIGASE (StGSH1), the rate-limiting enzyme in GSH biosynthesis. Pharmacological inhibition using buthionine sulfoximine (BSO) and exogenous GSH supplementation confirmed the essential role of GSH in LP adaptation. Confocal microscopy showed that StGSH1-GFP fusions localize to plastids in potato protoplasts. Overexpression and silencing of StGSH1 demonstrated that it maintained reactive oxygen species (ROS) homeostasis and attenuated LP-induced damage. StGSH1 also coordinated membrane lipid remodeling by upregulating both phospholipid catabolic genes (StNPC/PLD) and sulfolipid anabolic genes (StSQD1/2), shifting lipid flux from phosphatidylethanolamine (PE) to sulfoquinovosyldiacylglycerol (SQDG). Additionally, ETHYLENE RESPONSE FACTOR 10 (StERF10) is identified as a direct transcriptional activator of StGSH1. BSO-mediated GSH depletion reduced the LP adaptation in StERF10-OE plants, whereas GSH supplementation rescued StERF10-RNAi plants, indicating StERF10 conferred LP adaptation largely through StGSH1-mediated GSH biosynthesis. Collectively, these findings establish the StERF10-StGSH1 module as a critical nexus connecting GSH biosynthesis to LP adaptation, providing a rational target for breeding varieties with enhanced phosphorus use efficiency.
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