In salinity conditions, some of enzymatic systems have important role in scavenging of cell Reactive Oxygen Species (ROS). So, changes in proline content and activity of antioxidant enzymes such as Catalase (CAT), Peroxidase (POX) and Superoxide dismutase (SOD) and some other enzymes such as Rubisco and plasma membrane ATPase were evaluated under salt stress at greenhouse with ten durum wheat cultivars. Experiment was factorial based on completely randomized design with three replications. Treatments were salinity with three levels containing control, 60 and 120 mM and ten durum wheat cultivars including Boomer, PGS, 71135, 61130, 605, C1351, KND1000, KDM, Haurani and G1252. Results showed that interaction of salinity and cultivar was significant in all studied traits. Activity of ATPase, SOD, and POX and content of proline increased under salinity and activity of Rubisco and CAT decreased compared with control. In three salt levels, cultivar 61130 was the most tolerant considering to enzymatic results. Beside this cultivar, 71135 and C1352 in 60 mM, and Haurani, 605 and KND in 120 Mm were semi-tolerant cultivars. Cultivars 61130 and 605 were active in scavenging of ROS in comparison with other cultivars and could be used as most tolerant ones.
