Authors
Alberto Guirao, María Del Carmen Alamar, Ander Solana-Guilabert, Daniel Valero, Alejandra María Albert-Bermejo, María Emma García-Pastor, Juan Miguel Valverde, Domingo Martínez-Romero
Published in
Food research international (Ottawa, Ont.). Volume 242. Issue Pt 2. Pages 119907. Oct 31, 2026. Epub Jun 30, 2026.
Abstract
The table grape industry faces significant challenges regarding the organoleptic quality of early-season white seedless varieties, which often exhibit neutral aromatic profiles. This study evaluated the impact of foliar applications of 2.5% sorbitol, 0.7% calcium nitrate, and their combined complex (Sor-Ca) in 'Ivory™' grapes. We aimed to determine how these treatments modulate the hormonal balance, specifically abscisic acid (ABA) homeostasis, to address these physiological gaps. Results showed that Sor-Ca treatment altered harvest distribution by accelerating the ripening process, leading to a nearly two-fold increase in the proportion of fruit harvested during the initial harvest pass compared to the control, without affecting total cumulative yield. At commercial maturity, treated berries reached significantly higher sugar and phenolic levels. This metabolic shift was accompanied by an increase in total terpene concentration, primarily driven by gains in β-pinene, β-myrcene, and d-limonene. Hormonal profiling confirmed that these changes were linked to significantly higher active ABA levels and a 71% reduction in the inactive storage form, ABA-GE. These findings indicate that the Sor-Ca complex acts as a metabolic elicitor in 'Ivory™' table grapes, triggering the mobilization of hormonal reserves to synchronize sugar accumulation with aromatic maturation.
PMID:
42632742
Bibliographic data and abstract were imported from PubMed on 23 Aug 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 9
- Comments 0