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Dehydroascorbate Reductases and Glutathione Set a Threshold for High-Light-Induced Ascorbate Accumulation.

Plant physiology - 1 May 2020

Terai Yusuke, Ueno Hiromi, Ogawa Takahisa, Sawa Yoshihiro, Miyagi Atsuko, Kawai-Yamada Maki, Ishikawa Takahiro, Maruta Takanori

Abstract excerpt

Plants require a high concentration of ascorbate as a redox buffer for survival under stress conditions, such as high light. Dehydroascorbate reductases (DHARs) are enzymes that catalyze the reduction of DHA to ascorbate using reduced glutathione (GSH) as an electron donor, allowing rapid ascorbate recycling. However, a recent study using an Arabidopsis (Arabidopsis thaliana) triple mutant lacking all three DHAR...

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PMID: 32205453
DOI: 10.1104/pp.19.01556
PMCID: PMC7210653

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