Salicylic acid induced physiological and biochemical changes in wheat seedlings under water stress |
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Authors: | Bhupinder Singh K Usha |
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Institution: | (1) Indian Agricultural Research, Institute, Nuclear Research Laboratory, New Delhi, 110 012, India;(2) Indian Agricultural Research Institute, Division of Fruits and Horticultural Technology, New Delhi, 110 012, India |
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Abstract: | Salicylic acid (SA) is an important signal molecule modulating plantresponses to stress. It is recently reported to induce multiple stresstolerancein plants including drought. An experiment was, therefore, conducted toascertain the effect of salicylic acid on the growth and metabolic profile ofwheat seedlings under water stress. Irrespective of the SA concentration(1–3 mM) and water stress, SA treated plants showed, ingeneral, a higher moisture content, dry mass, carboxylase activity of Rubisco,superoxide dismutase (SOD) activity and total chlorophyll compared to those ofuntreated seedlings. SA treatment, under water stress, protected nitratereductase (NR) activity and maintained, especially at 3 mM SAconcentration, the protein and nitrogen content of leaves compared to watersufficient seedlings. Results signify the role of SA in regulating the droughtresponse of plants and suggest that SA could be used as a potential growthregulator, for improving plant growth under water stress. |
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Keywords: | Nitrate reductase Ribulose-1 5-bisphosphate carboxylase/oxygenase Salicylic acid Superoxide dismutase Triticum aestivum L |
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