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Drought stress response of rice yield (Oryza sativa L.) and role of exogenous salicylic acid

Md. Tofail Hosain, Kamrunnahar, Md. Mofizur Rahman, Mostarak Hossain Munshi, Md. Saidur Rahman

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Int. J. Biosci.16(2), 222-230, February 2020

DOI: http://dx.doi.org/10.12692/ijb/16.2.222-230


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The scarcity of water is a severe environmental constraint to plant productivity. The exogenous application of salicylic acid (SA) has been found very effective in reducing the adverse effects of drought stress. A pot experiment was conducted to determine the drought mitigating effect of Salicylic acid on rice based on Randomized Complete Block Design (RCBD) with three replications during the 2017-2018 growing season at Dhaka, Bangladesh. The treatments of salicylic acid including 0, 250, 500, 750 and 1000 µMm-2 concentrations and drought stress consisted of control, moderate and severe stresses. Significantly higher number of panicle hill-1, number of filled grain hill-1, and number of unfilled grain hill-1, 1000 grains weight, grain yield, straw yield and harvest index were found in plants treated with 750 µMm-2 SA compared with other treatments and control plants. Results signify the role of SA in regulating the drought response of plants and suggest that SA could be used as a potential protectant, for improving plant growth and productivity under water stress.


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Drought stress response of rice yield (Oryza sativa L.) and role of exogenous salicylic acid

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