PJB-2021-600
Osmotic adjustment and metabolic changes under drought stress conditions in wheat (Triticum aestivum L.) genotypes
Liaquat Ali Bhutto, Colin P. Osborne and W. Paul Quick
Abstract
Osmotic adjustment (OA) of cells helps to conserve the water balance of the plant, and this adjustment is generally achieved through increased amounts of various common solutes. The core objective of this study is to determine whether the active accumulation of compatible solutes in salt tolerant accessions of bread wheat confers cross-tolerance to drought stress conditions. The work determines whether the salt tolerant cultivars W4909 and W4910 may also tolerate drought stress through osmotic adjustment and metabolic changes. The salt tolerant cultivars W4909 and W4910 had significantly higher amounts of total identified carbohydrates and amino acids in the evening and morning of the fifteenth day of drought stress as compared to Yecora Rojo. This suggests that W4909 and W4910 maintained efficient osmotic adjustment to conserve water, prevent the denaturation of soluble proteins and regulate ion transport. Under drought stress conditions, the salt tolerant cultivars responded by overproduction of different types of inorganic and organic solutes metabolites as osmolytes, showing that directed breeding for salt tolerance may confer cross-tolerance to drought in this major cereal crop
To Cite this article:
Bhutto, L.A., C.P. Osborne and W.P. Quick. 2023. Osmotic adjustment and metabolic changes under drought stress conditions in wheat (Triticum aestivum L.) genotypes. Pak. J. Bot., 55(3): DOI: http://dx.doi.org/10.30848/PJB2023-3(22)
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