Consecutive Moderate and Severe Drought Stresses Affect Chlorophyll Fluorescence and Non-structural Carbohydrates Dynamics in Grapevine Leaves.

ABSTRACT: Drought events represent a growing challenge for agriculture in the Mediterranean region, particularly for Vitis vinifera, a species with economic and cultural significance. This study evaluates the effects of two subsequent drought stress events on grapevine cv. Sauvignon blanc, combining physiological and biochemical approaches. The trial was conducted in a semi-controlled tunnel from mid-June to mid-July 2024 on potted vines. Plants were divided into well-watered and drought groups. Drought-stressed vines underwent two drought cycles: the first reaching -1.3 MPa stem water potential, followed by rewatering, and the second with either moderate (-1.3 MPa) or severe (-2.5 MPa) drought before another rewatering. Stomatal conductance, chlorophyll fluorescence, gas exchange, and nonstructural

SUBMITTER: Canton M 

PROVIDER: S-EPMC12451097 | biostudies-literature | 2025 Sep-Oct

REPOSITORIES: biostudies-literature