Evaluation of some physiological traits and activity of antioxidant enzymes of coriander (Coriandrum sativum ) in response to inoculation of mycorrhiza under salinity stress

The aim of this study was to evaluate the ionic leakage, proline concentration, malondialdehyde concentration and antioxidant enzymes activity in aerial parts and root of coriander plan t in response to mycorrhizal inoculation under salinity stress in greenhouse of Faculty of Agriculture and Natural Resources, Tehran University.The experiment was a factorial based on randomized complete block design with three replications. The treatments consisted of three levels of salinity including control (without stress), 60 and 120 millimolar sodium chloride salt and two levels of mycorrhizal inoculation (inoculation and inoculation of Glomus mosseae mycorrhiza). The evaluated traits included ion leakage, malondialdehyde concentration, proline concentration and antioxidant activity of superoxide dismutase, catalase and guaiac peroxidase. The results show that increasing salinity effects on physiological traits were evaluated. So, with increasing salinity stress, ion leakage, malondialdehyde concentration, proline concentration increased significantly. This increase was higher in the roots, indicating higher sensitivity of this roots to salt stress. Application of mycorrhizal treatment reduced the concentration of malondialdehyde and ion leakage in stress conditions. Also, the amount of proline in mycorrhizal plants was lower than non-mycorrhizal. Salinity stress increased the activity of antioxidant enzymes. The activity of all three enzymes evaluated was higher in the root than the shoot. The activity of the enzyme catalase was significantly higher than the other two enzymes. The application of mycorrhizal treatment has an important role in promoting the growth and activity of coriander antioxidant enzymes, especially under severe stress conditions. However, mycorrhizal and non-mycorrhizal giants did not differ significantly in terms of the enzyme guaiac peroxidase.