Drought-Induced Xylem Sulfate Activates the ABA-Mediated Regulation of Sulfate Assimilation and Glutathione Redox in Brassica napus Leaves.

ABSTRACT: Drought intensity modifies the assimilatory pathway of glutathione (GSH) synthesis. Abscisic acid (ABA) is a representative signaling hormone involved in regulating plant stress responses. This study aimed to investigate an interactive regulation of sulfate and/or ABA in GSH metabolism and redox. The drought-responsive alterations in sulfate assimilation and GSH-based redox reactions were assessed relative to ABA responses on the time-course of drought intensity. Drought-responsive H₂O₂ concentrations were divided into two distinct phases-an initial 4 days of no change (Ψ_w ≥ -0.49 MPa) and a phase of higher accumulation during the late phase of the drought (days 10-14; Ψ_w ≤ -1.34 MPa). During the early phase of the drought, GSH/GSSG

SUBMITTER: Lee BR 

PROVIDER: S-EPMC9781433 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature