In the absence of other acceptors electrons can be transferred from photosystem I to oxygen Ascorbate Glutathione Cycle and Abiotic Stress Tolerance in Plants Springer Nature Link Frontiers The Multiple Roles of Ascorbate in the Abiotic Stress Response of Plants: Antioxidant, Cofactor, and Regulator Structural understanding of the recycling of oxidized ascorbate by dehydroascorbate reductase (OsDHAR) from Oryza sativa L. japonica Scientific Reports