Effects of exogenous methyl jasmonate and light condition on grape berry coloration and endogenous abscisic acid content

Abstract

Suitable postharvest treatment methods were investigated to improve the color of grape berries. Culture solutions containing jasmonic acid (JA), methyl jasmonate (MeJA), and prohydrojasmon (PDJ) enhanced the skin coloration of grape berries ('Pione') harvested at the initial stage of coloration. MeJA vapor treatment under sealed conditions increased anthocyanin accumulation in grape berries ('AkiQueen' and 'Pione') harvested at the early stage of skin coloration. Furthermore, promoting skin coloration by MeJA vapor treatment was as effective in mature clusters as it was in detached berries. These effects were confirmed in light conditions but not in constant darkness. Our results showed that postharvest MeJA vapor treatment improved skin coloration in grapes. In addition, postharvest treatment with MeJA was found to have no effect on the endogenous abscisic acid content of grape berry skins. Therefore, we suggest that MeJA vapor treatment can be a useful and labor-saving method for the horticultural industry.

EBR and JA regulate aroma substance biosynthesis in ‘Ruidu Hongyu’ grapevine berries by transcriptome and metabolite combined analysis

“…These further authenticated that the increase of terpenes and aldehydes contents might be regulated by exogenous EBR and JA signals. The outcomes were more consistent with previous findings that the exogenous EBR and JA were involved in regulating the biosynthesis of several metabolites, including monosaccharides, anthocyanins, fatty acids, amino acids, and so on, with significantly higher levels than the CK group ( Mao et al., 2017 ; Vergara et al., 2018 ; Nakajima et al., 2021 ; Chen et al., 2022 ; Li et al., 2022 ; Lv et al., 2022a ). Results of this study provided reference information for verifying the interaction of EBR and JA in regulating aroma substances biosynthesis.…”

Shading Treatment Reduces Grape Sugar Content by Suppressing Photosynthesis-Antenna Protein Pathway Gene Expression in Grape Berries

“…Nevertheless, bagging certain berries can still enhance the coloration of the fruits [29]. Grape berry quality is not only related to the size of the berries but also to their color [30]. In addition, the time of harvest also influenced the anthocyanin content of Pinot Noir grapes.…”