Ascorbate metabolism and the developmental demand for tartaric and oxalic acids in ripening grape berries
Melino, Vanessa Jane
Soole, Kathleen Lydia
Ford, Christopher M
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We demonstrate strong developmental regulation of ascorbic acid (Asc) biosynthetic, recycling and catabolic genes in grape berries. Integration of the transcript, radiotracer and metabolite data demonstrates that Asc and tartaric acid (TA) metabolism are developmentally regulated in grapevines; resulting in low accumulated levels of the biosynthetic intermediate Asc, and high accumulated levels of the metabolic end-product TA.