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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.
- Source :
- Horticulturae; Apr2024, Vol. 10 Issue 4, p346, 15p
- Publication Year :
- 2024
-
Abstract
- The phytohormone gibberellic acid (GA<subscript>3</subscript>) is widely used in the table grape industry. However, there is a paucity of information concerning the effects of GA<subscript>3</subscript> on fruit quality and sink strength. This study investigated the effects of exogenous GA<subscript>3</subscript> 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 GA<subscript>3</subscript> treatments, GA<subscript>3</subscript>, IAA, and CTK contents increased, whereas ABA content 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 GA<subscript>3</subscript> 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- GIBBERELLIC acid
CARBON cycle
ORGANIC acids
TABLE grapes
SUGARS
MALIC acid
Subjects
Details
- Language :
- English
- ISSN :
- 23117524
- Volume :
- 10
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Horticulturae
- Publication Type :
- Academic Journal
- Accession number :
- 176876706
- Full Text :
- https://doi.org/10.3390/horticulturae10040346