The scion-driven transcriptomic changes guide the resilience of grafted near-isohydric grapevines under water deficit.

ABSTRACT: The large diversity of grapevine cultivars includes genotypes more tolerant to water deficit than others. Widely distributed cultivars, like Merlot, are more sensitive to water deprivation than local cultivars like Callet, which are more adapted to water deficit due to their Mediterranean origin. Despite their tolerance, adaptation to water deficit influenced by grafting in rootstocks like 110 Richter is key to facing drought in vineyards, defining the scion-rootstock relationship. To understand these differences, we explored transcriptomic, metabolic, hormonal and physiological responses under three levels of water deficit (mild, high, and extreme), using 110 Richter as the rootstock in both cultivars. Results revealed that sensitivity to abscisic acid (ABA) is

SUBMITTER: Rodriguez-Izquierdo A 

PROVIDER: S-EPMC11789524 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature