Aquaporin translation tunes plant water transport to external conditions in grapevine.

Water stress challenges global crop productivity, particularly for perennial species such as grapevines, where effective water management is crucial for berry quality and yield. Aquaporins, a family of water channel proteins, play a key role in regulating water transport within plant cells, affecting water uptake and redistribution. Although the transcriptional response of aquaporin genes to water stress in grapevines has been documented, their translational regulation remains less explored.

Expressional diversity of grapevine 3-Hydroxy-3-methylglutaryl-CoA reductase (VvHMGR) in different grapes genotypes.

Background: 3-Hydroxy-3-methylglutaryl-CoA reductase (HMGR) is a key enzyme in the mevalonate (MVA) pathway, which regulates the metabolism of terpenoids in the cytoplasm and determines the type and content of downstream terpenoid metabolites.

Results: Results showed that grapevine HMGR family has three members, such as VvHMGR1, VvHMGR2, and VvHMGR3. The expression of VvHMGRs in 'Kyoho' has tissue specificity, for example, VvHMGR1 keeps a higher expression, VvHMGR2 is the lowest, and VvHMGR3 gradually decreases as the fruit development.

The Effect of Ethylene on the Color Change and Resistance to Infection in 'Kyoho' Grape Fruits.

The formation of grape quality and the mechanism of resistance against foreign pathogens affect the storage stability of fruits during post-harvest handling. Ethylene plays a crucial role in regulating the ripeness of fruits and can be used as an exogenous regulator to resist exogenous pathogens. In this study, we used different concentrations of ethephon for treatment of grape fruits before veraison, analyzed the anthocyanin content, soluble solids, titratable acid, and determined fruit firmness and cell wall metabolism-related enzymes during fruit development.