Starch depletion in the xylem and phloem ray parenchyma of grapevine stems under drought.

ABSTRACT: While nonstructural carbohydrate (NSC) storage can support long-lived woody plants during abiotic stress, the timing and extent of their use are less understood, as are the thresholds for cell mortality as NSCs and water supplies are consumed. Here, we combine physiological and imaging tools to study the response of Vitis riparia to a 6-week experimental drought. We focused on the spatial and temporal dynamics of starch consumption and cell viability in the xylem and phloem of the stem. Starch dynamics were further corroborated with enzymatic starch digestion and X-ray microcomputed tomography imaging. Starch depletion in the stems of droughted plants was detected after 2 weeks and continued over time. We observed distinct differences in starch content and cell viability in the xyle

SUBMITTER: Prats KA 

PROVIDER: S-EPMC10601394 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature