Effects of Girdling and Foliar Fertilization with K on Physicochemical Parameters, Phenolic and Volatile Composition in ‘Hanxiangmi’ Table Grape

Aroma is one of the most important indicators grape quality. Girdling and foliar fertilization with K (K2O) are common agronomic practices applied to improve berry quality in production. However, little known about its effect on accumulation biosynthesis entire aromatic profile. Our study was aimed explore influences girdling (alone or combination) general properties, phenolic composition, volatile free aroma compounds, spatial temporal expression terpene-related genes sensory properties ‘Hanxiangmi’ table grape. In this study, we found that facilitated fruit enlargement increased compounds skin. The combination treatment significantly promoted concentrations total soluble solids (TSS) pulp proanthocyanidins skin, had a lower titratable acidity (TA) compared those control. contrast, alone acidity. Volatile composition analysis revealed significantly, notably terpenes, such as nerol, citronellol linalool. Spatial showed level VvDXS correlated linalool terpenes concentrations, result which, speculated candidate gene for regulation terpenes. We hope our results can direct farmers better apply