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Effects of Gibberellic Acid on Soluble Sugar Content, Organic Acid Composition, Endogenous Hormone Levels, and Carbon Sink Strength in Shine Muscat Grapes during Berry Development Stage
Li, X.; Cai, Z.; Liu, X.; Wu, Y.; Han, Z.; Yang, G.; Li, S.; Xie, Z.; Liu, L.; Li, B. Effects of Gibberellic Acid on Soluble Sugar Content, Organic Acid Composition, Endogenous Hormone Levels, and Carbon Sink Strength in Shine Muscat Grapes during Berry Development Stage. Horticulturae2024, 10, 346.
Li, X.; Cai, Z.; Liu, X.; Wu, Y.; Han, Z.; Yang, G.; Li, S.; Xie, Z.; Liu, L.; Li, B. Effects of Gibberellic Acid on Soluble Sugar Content, Organic Acid Composition, Endogenous Hormone Levels, and Carbon Sink Strength in Shine Muscat Grapes during Berry Development Stage. Horticulturae 2024, 10, 346.
Li, X.; Cai, Z.; Liu, X.; Wu, Y.; Han, Z.; Yang, G.; Li, S.; Xie, Z.; Liu, L.; Li, B. Effects of Gibberellic Acid on Soluble Sugar Content, Organic Acid Composition, Endogenous Hormone Levels, and Carbon Sink Strength in Shine Muscat Grapes during Berry Development Stage. Horticulturae2024, 10, 346.
Li, X.; Cai, Z.; Liu, X.; Wu, Y.; Han, Z.; Yang, G.; Li, S.; Xie, Z.; Liu, L.; Li, B. Effects of Gibberellic Acid on Soluble Sugar Content, Organic Acid Composition, Endogenous Hormone Levels, and Carbon Sink Strength in Shine Muscat Grapes during Berry Development Stage. Horticulturae 2024, 10, 346.
Abstract
This study investigated the effects of exogenous gibberellic acid (GA) treatments (elongating cluster + seedless + expanding, T1; seedless + expanding, T2; expanding, T3 and water, CK) on the content of sugars, organic acids, and endogenous hormones and sink strength.Results showed that T2 treatment displayed the highest fructose and glucose levels at 100 days after treatment (DAT), whereas its effect on tartaric acid, malic acid, and citric acid concentrations at 80 and 100 DAT was relatively weak. Under GA3 treatments, both GA3, IAA, and CTK contents increased, whereas ABA contents decreased at 1, 2, 4, 8, and 48 h. Analysis of sugar phloem unloading revealed that T2 treatment exhibited the highest values during softening and ripening stages. Our findings indicate that appropriate GA3 application can positively influence sink strength by regulating sink size and activity, including berry size enlargement, sugar phloem unloading and sugar accumulation in grape sink cells.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
