International Journal of Pharma and Bio Sciences
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10.22376/ijpbs.2019.10.1.p1-12
Volume 3 Issue 4
2012(October - December)
EFFECT OF SALINITY STRESS ON PHYSIOLOGICAL, BIOCHEMICAL AND ANTIOXIDANT DEFENSE SYSTEMSÂ OF HIGH YEILDING CULTIVARS OF SOYABEAN
Salinity stress is a major adverse factor that limits agricultural productivity and this is one of the major abiotic stresses faced by plants. Salinity affects plant growth, physiological activities and developmental processes. Soya bean is one of the proteinaceous commercial crops in India, where salt stress is the limiting factor. In the present work, six cultivars of beans (ADB-22, DSB-20, JS-93.05, JS-93.37, JS-335, and LSB-18) were tested under differing NaCl concentrations to assess their performance in salt conditions. The aim was to select salt tolerant bean cultivars. In order to investigate the effect of salt stress on plant height, fresh and dry weight, chlorophyll levels, total protein content, SOD, Catalase, Lipid peroxidase (LPX), Glutathione reductase (GR) and Ascorbate peroxidase (APX) of Soya plants of all the six cultivars subjected to salinity levels at varying concentrations of NaCl (control, 50, 100, 150, 200mM) and collected after 10days of NaCl treatment. The obtained results showed that higher levels of NaCl concentrations, reduced plant height, fresh weight, dry weight, chlorophyll levels and total protein content. Under stress conditions a decline in SOD and Catalase activity were observed in all six cultivars but the percentage of decrease was more significant in DSB-20. Meanwhile there was an increase in APX, LPX and GR activities in all the cultivars of soyabean. Among all the cultivars studied under salt conditions, changes were drastic and more in ADB-22, where as changes were less significant in JS-93.37 and DSB-20. Thus this paves a way to state that ADB-22 may be a salt susceptible variety while JS-93.37 and DSB-20 may be salt tolerant varieties. The present findings indicate that salinity (NaCl) triggered an antioxidant response in lessThan i greaterThan Glycine max lessThan /i greaterThan L
ANITHA.T AND USHA.R
Glycine max L., Cultivars, Antioxidant enzymes, Salinity stress and NaCl.
851-864