Phytoglobin Expression Alters the Na⁺/K⁺ Balance and Antioxidant Responses in Soybean Plants Exposed to Na₂SO₄.

ABSTRACT: Soybean (Glycine max) is an economically important crop which is very susceptible to salt stress. Tolerance to Na₂SO₄ stress was evaluated in soybean plants overexpressing or suppressing the phytoglobin GmPgb1. Salt stress depressed several gas exchange parameters, including the photosynthetic rate, caused leaf damage, and reduced the water content and dry weights. Lower expression of respiratory burst oxidase homologs (RBOHB and D), as well as enhanced antioxidant activity, resulting from GmPgb1 overexpression, limited ROS-induced damage in salt-stressed leaf tissue. The leaves also exhibited higher activities of the H₂O₂-quenching enzymes, catalase (CAT) and ascorbate peroxidase (APX), as well as enhanced leve

SUBMITTER: Youssef MS 

PROVIDER: S-EPMC9031766 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature