Impact of heat stress, water stress, and their combined effects on the metabolism and transcriptome of grape berries.

ABSTRACT: Recurring heat and drought episodes present challenges to the sustainability of grape production worldwide. We investigated the impacts of heat and drought stress on transcriptomic and metabolic responses of berries from two wine grape varieties. Cabernet Sauvignon and Riesling grapevines were subjected to one of four treatments during early fruit ripening: (1) drought stress only, (2) heat stress only, (3) simultaneous drought and heat stress, (4) no drought or heat stress (control). Berry metabolites, especially organic acids, were analyzed, and time-course transcriptome analysis was performed on samples before, during, and after the stress episode. Both alone and in conjunction with water stress, heat stress had a much more significant impact on berry organic acid content, pH, and titra

SUBMITTER: Hewitt S 

PROVIDER: S-EPMC10279648 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature