Photosynthetica 2024, 62(3):232-239 | DOI: 10.32615/ps.2024.027

Selenium improves wheat antioxidant capacity, photosynthetic capacity, and growth under cadmium stress

L.M. WU, N.H. LU
Henan Institute of Science and Technology, 453003 Xinxiang, China

Cadmium stress (CS) induced the peroxide damage and inhibited wheat photosynthetic capacity and growth. Compared to CS, selenium (Se) application plus CS bolstered chlorophyll and carotenoid contents, photosynthetic rate, the maximum photochemical efficiency of PSII, the quantum yield of PSII photochemistry, and photochemical quenching, superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase, L-galactono-1,4-lactone dehydrogenase, and gamma-glutamylcysteine synthetase activities, ascorbic acid and glutathione contents, AsA/dehydroascorbic acid and GSH/oxidized glutathione, and decreased nonphotochemical quenching (qN), antioxidant biomarkers malondialdehyde and hydrogen peroxide contents, and electrolyte leakage (EL). At the same time, Se alone declined antioxidant biomarkers contents, qN and EL, and augmented the rest of the aforementioned indexes. Our research implied that Se upregulated wheat's antioxidant capacity. In this way, Se improved wheat photosynthetic performance and growth, especially for 10 μM sodium selenite (Na2SeO3). Consequently, 10 μM Na2SeO3 may be considered a useful exogenous substance to reinforce wheat cadmium tolerance.

Additional key words: antioxidant enzyme; cadmium treatment; nonenzymatic antioxidant; sodium selenite; Triticum aestivum.

Received: January 30, 2024; Revised: June 5, 2024; Accepted: June 26, 2024; Prepublished online: July 30, 2024; Published: October 14, 2024  Show citation

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WU, L.M., & LU, N.H. (2024). Selenium improves wheat antioxidant capacity, photosynthetic capacity, and growth under cadmium stress. Photosynthetica, 62(3), 232-239. doi: 10.32615/ps.2024.027
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