Foliar-applied trehalose modulates growth,mineral nutrition,photosynthetic ability,and oxidative defense system of rice (Oryza sativa L.) under saline stress |
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| Authors: | Muhammad Shahbaz Abida Abid Atifa Masood Ejaz Ahmed Waraich |
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| Institution: | 1. Department of Botany, University of Agriculture, Faisalabad, Pakistan;2. Department of Crop Physiology, University of Agriculture, Faisalabad, Pakistan |
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| Abstract: | A tub experiment was conducted to assess the effect of exogenously applied trehalose (0, 10, and 20 mM) on various attributes of two rice cultivars (Bas-385 and Bas-2000) under salt stress (0, 50, 100, and 150 mM). Salinity decreased growth, gas exchange characteristics, shoot and root potassium (K+) ions, hydrogen peroxide (H2O2), total soluble proteins, activity of catalase (CAT), and yield attributes, while it increased chlorophyll contents, shoot and root sodium (Na+) and calcium (Ca2+), malondialdehyde (MDA), glycinebetain (GB), free proline, and peroxidase (POD) activity. Foliar-applied trehalose improved growth attributes, net photosynthetic rate, GB, total soluble proteins, superoxide dismutase (SOD) and yield. Yield was not obtained at 150 mM salt stress. The rice cultivar Bas-2000 showed better performance with respect to gas exchange attributes and activities of enzymatic antioxidants. Overall, varying levels of foliar-applied trehalose proved to be effective in ameliorating adverse effects of salt stress on rice. |
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| Keywords: | antioxidants photosynthesis rice salinity trehalose |
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