Hamid Nouri - Ph.D. Student, Associate Professor and Assistant Professor, Department ofPlant Breeding and Biotechnology, Gorgon university of Agricultural Sciences andNatural Resources, Gorgan, Iran
Saeid Navabpour - Ph.D. Student, Associate Professor and Assistant Professor, Department ofPlant Breeding and Biotechnology, Gorgon university of Agricultural Sciences andNatural Resources, Gorgan, Iran
Ahad Yamchi - Ph.D. Student, Associate Professor and Assistant Professor, Department ofPlant Breeding and Biotechnology, Gorgon university of Agricultural Sciences andNatural Resources, Gorgan, Iran
Farhood Ziaei - Associate Professor, Agricultural, Medical and Industrial Research, NuclearSciences and Technology Research Institute, Karaj, Iran

Effect of sodium chloride salinity was studied in advanced mutant lines T-65-7-1 and T-67-60 (tolerant) and their wild type Tabasi (moderately tolerant) wheat genotypes under control and level of salinity (EC 6 ds m-1) at seedling stage. Salinity treatment decreased the contents of chlorophyll (CHL), carotenoids (CAR), ?-Tocopherol (TOC) as well as enzyme activities including catalase (CAT), superoxide dismutase(SOD), ascorbic acid (AA), ascorbate peroxidase (APOX), and glutathione reductase (GR), whereas increased the contents of superoxide ion (O2-), hydrogen peroxide (H2O2), thiobarbituric acid reactive material (TBARM) (measuring of lipid peroxidation) in wild type Tabasi cultivar. Salinity tolerant mutant line T-67-60 showed more enzymatic activities (CAT, SOD, ASA, APOX, GR) as well as CHL, CAR and TOC contents than T-65-7-1 mutant line and Tabasi cultivar. Interestingly, the contents of O2 -, H2O2 and TBARM in T-67-60 line showed less increased than T- 65-7-1 line and Tabasi cultivar by salinity treatment. Base on these results the tolerance of T-67-60 mutant line to salinity, justified by intensified enzyme activitiesto control oxidative damage via quench ROS levels

Antioxidant Enzymes, Salinity, Mutant Line, Lipid Peroxidation, Wheat