Supplementation of Jasmonic acid Mitigates the Damaging Effects of Arsenic Stress on Growth, Photosynthesis and Nitrogen Metabolism in Rice

• Published in: Rice (New York, N.Y.) Vol. 17; no. 1; p. 31
• Main Authors: Attia, Houneida, Alamer, Khalid H.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2024; Springer Nature B.V; SpringerOpen
• Subjects: Agriculture; Amino acids; Arsenic; Biomedical and Life Sciences; Carotenoids; Chlorophyll; Damage; Gas exchange; Hydrogen peroxide; Jasmonic acid; Life Sciences; Lipid peroxidation; Lipids; Lipoxygenase; Nitrate reductase; Nitrogen; Nitrogen metabolism; Osmolytes; Oxidative stress; Parameters; Peroxidation; Phenols; Photosynthesis; Photosystem II; Plant Breeding/Biotechnology; Plant Ecology; Plant Genetics and Genomics; Plant Sciences; Reductases; Ribulose-bisphosphate carboxylase; Oxidative stress; Nitrogen metabolism; Arsenic; Photosynthesis; Jasmonic acid; Osmolytes
• ISSN: 1939-8425; 1939-8433; 1934-8037
• DOI: 10.1186/s12284-024-00709-9

Experiments were conducted to evaluate the role of exogenously applied jasmonic acid (JA; 0.1 and 0.5 µM) in alleviating the toxic effects of arsenic (As; 5 and 10 µM) stress in rice. Plants treated with As showed considerable decline in growth attributes like height, fresh and dry weight of plant. Arsenic stress reduced the content of δ-amino livulenic acid (δ-ALA), glutamate 1-semialdehyde (GSA), total chlorophylls and carotenoids, with more reduction evident at higher (10 µM) As concentrations, however exogenously supplied JA alleviated the decline to considerable extent. Arsenic stress mediated decline in photosynthetic gas exchange parameters, Fv/Fm (PSII activity) and Rubisco activity was alleviated by the exogenous treatment of JA. Arsenic stress caused oxidative damage which was evident as increased lipid peroxidation, lipoxygenase activity and hydrogen peroxide concentrations however, JA treatment declined these parameters. Treatment of JA improved the activity of nitrate reductase and glutamate synthase under unstressed conditions and also alleviated the decline triggered by As stress. Activity of antioxidant enzymes assayed increased due to As stress, and the supplementation of JA caused further increase in their activities. Moreover, the content of proline, free amino acids and total phenols increased significantly due to JA application under stressed and unstressed conditions. Treatment of JA increased the content of nitrogen and potassium while as reduced As accumulation significantly.