Cobalt enhanced the drought-stress tolerance of rice (Oryza sativa L.) by mitigating the oxidative damage and enhancing yield attributes
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Manuscript 30-4-2023, Reviewed, ...
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2025-06-13
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Final Accepted Manuscript
Author
Tourky, Shaimaa M.N.Shukry, Wafaa M.
Hossain, Mohammad Anwar
Siddiqui, Manzer H.
Pessarakli, Mohammad
Elghareeb, Eman M.
Affiliation
School of Plant Sciences, The University of ArizonaIssue Date
2023-06-13
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Elsevier BVCitation
Tourky, S. M., Shukry, W. M., Hossain, M. A., Siddiqui, M. H., Pessarakli, M., & Elghareeb, E. M. (2023). Cobalt enhanced the drought-stress tolerance of rice (Oryza sativa L.) by mitigating the oxidative damage and enhancing yield attributes. South African Journal of Botany, 159, 191-207.Journal
South African Journal of BotanyRights
© 2023 SAAB. Published by Elsevier B.V. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Water scarcity is one of the most important abiotic factors limiting rice growth and productivity. The application of nutrients affects various physiological and biochemical mechanisms to curtail water deficiency, but little is known about the ameliorative effects of cobalt (Co) on rice. Our study aimed to investigate the advantageous effects of soaking in Co at the optimum concentration (10 and 44.5 µM) on morpho-physiological traits and oxidative stress, during the vegetative and reproductive stages, also assessing yield attributes, in two rice varieties (Sakha 104, drought-sensitive, and Giza 178, drought-tolerant). Treatments included control (100% field capacity (FC)), moderate drought stress (75 % FC), and severe drought stress (50 % FC) either alone or in combination with Co. A water deficit and oxidative stress affected Giza 178 less than Sakha 104. Co application significantly enhanced the performance of two rice varieties under drought stress by increasing plant height, biomass, water content, tillering, leaf area, pigments (chlorophyll a, carotenoids, total chlorophyll), sugars (soluble sugars, and total carbohydrates), and Co content (shoot and root). Also, Co significantly increased the performance of the antioxidant system by elevating the concentration of total phenols, flavonoids, proline, and antioxidant enzymes (catalase, peroxidase, and polyphenol oxidase), while significantly decreasing chlorophyll b, malondialdehyde, and 2,2-diphenyl-1-picryl-hydrazyl. Yield attributes such as the number of tillers, panicle parameters (number, length, and weight), 100-grain weight, harvest index, and grain nutritive value (sugars, vitamin B, and Co contents) were significantly enhanced by Co in both varieties. However, the maximum performance was observed in Giza 178.Note
24 month embargo; first published 13 June 2023ISSN
0254-6299Version
Final accepted manuscriptSponsors
Mansoura Universityae974a485f413a2113503eed53cd6c53
10.1016/j.sajb.2023.05.035