RT Journal T1 DETECTION OF SALINE TOLERANT WHEAT CULTIVARS (TR ITICUM AESTIVUM L.) USING LIPID PEROXIDATION, ANTIOXIDANT DEFENSE SYSTEM, GLYCINE- BETAINE AND PROLINE CONTENTS A1 A. Rao A1 S. D. Ahmad A1 S. M. Sabir A1 S. I. Awan A1 A. Hameed A1 S. R. Abbas A1 M. Shehzad A1 M. F. Khan A1 S. Shafique A1 Z. Ahmad JF Journal of Animal and Plant Sciences JO JAPS SN 1018-7081 VO 23 IS 6 SP 1742 OP 1748 YR 2013 FD 2013/12/01 DO DOI NA AB

Salt produces free radicals in the plants and these free radicals are scavenged by the antioxidative capacity of the plant. Change in antioxidant activity, phenolic contents, lipid peroxidation, glycine betaine and proline contents were investigated in fifteen genotypes of wheat differing in salt tolerance. The results revealed that the aqueous extracts of wheat (300 µg/ml) in control and under salt stress (i.e. electrical conductivity, 2 EC, 4 EC, 8 EC and 16 EC) demonstrated antioxidant activity in DPPH radical assay and their increased scavenging percentage showed that AUQAB-2000, PIRSABAK-05, BAKHAR-2002 can be considered as salt tolerant varieties. The change of phenolic content suggests that wheat uses antioxidant properties of phenolics as a mechanism of salt stress. Whereas, the lipid peroxidation, proline and glycine betaine data has indicated that AUQAB-2000, PUNJAB-85, PIRSABAK-05, BAKHAR-2002, FARKHARE-SARHAD and KAGHAN-94 can be considered as salt tolerant varieties. Salt tolerant varieties also showed higher amount of yield at different salinity levels. These results indicate that these cultivars of wheat alleviate the deleterious effect of salt stress by their antioxidant activity and increased production of proline and betaine.

K1 Wheat, salt stress, antioxidant activity, phenolic content, osmolytes, oxidative stress, salinity levels PB Pakistan Agricultural Scientists Forum LK https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-639