Pre-harvest foliar spraying of calcium and zinc preserves berries quality and mitigates chilling injury of grape during cold storage

•Sprayed with Ca + Zn maintained grape postharvest quality related indices at higher level.•Fruit treated with Ca + Zn showed higher flavonols, flavanols and anthocyanins than control grapes.•Ca and Zn foliar application was also effective in preserving the levels of trans-resveratrol and phenolic a...

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Bibliographic Details
Published in:Scientia horticulturae 2024-12, Vol.338, p.113557, Article 113557
Main Authors: Asgarian, Zahra Sadat, Karimi, Rouhollah, Palou, Lluís
Format: Article
Language:English
Subjects:
Flavonoids
Grapes
Nutrition
Phenolic acids
Resveratrol
Storage
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Summary:•Sprayed with Ca + Zn maintained grape postharvest quality related indices at higher level.•Fruit treated with Ca + Zn showed higher flavonols, flavanols and anthocyanins than control grapes.•Ca and Zn foliar application was also effective in preserving the levels of trans-resveratrol and phenolic acids in grape.•The higher phenolic compounds in Ca + Zn-treated grapes was accompanied with lower activity of polyphenol oxidase, and lower incidence of fungal decay.•Nutrients spray enhances antioxidant enzymes activities, antioxidant capacity and moderates chilling injury. The current study was conducted to elucidate the effect of single and combined post-veraison sprays of calcium nitrate (Ca, 2 %) and zinc sulfate (Zn, 1 %) on post-harvest quality attributes of ‘Sahebi’ grapes during cold storage. Grapes foliar-sprayed with combination of Ca and Zn showed higher flavonols (28 % myricetin, 4 % quercetin, and 15 % kaempferol), flavanols (6 % catechin, 29 % epicatechin, and 10 % epi‑gallocatechin) and anthocyanins (21 % malvidin, 16 % cyaniding and 13 % peonidin, 22 % petunidin) than controls. Moreover, Ca and Zn foliar application was also effective in preserving the levels of trans-resveratrol and phenolic acids in grape berries. The higher amount of phenolic compounds in Ca + Zn-treated grapes was accompanied with higher activity of antioxidant enzymes, lower activity of polyphenol oxidase, and lower incidence of fungal decay. In general, post veraison spray of Ca and Zn is promising viticultural operation for preserving berries bioactive compound and mitigating chilling injury of grape during cold storage.
ISSN:0304-4238
DOI:10.1016/j.scienta.2024.113557