EFFECT OF SALT STRESS ON GROWTH AND LIPID PEROXIDATION OF TOMATO (LYCOPERSICUM ESCULENTUM) CULTIVARS AT VEGETABLE STAGE
This research was carried out in order to evolution effect of salt stress on physiology of two salt tolerance tomato cultivars (Vendor and Vantage) and two salt sensitive tomato cultivar (TC-11 and Holia) at Islamic Azad University (Shoushtar branch), Iran, in 2010. Salt stress treatments were applied using salt solutions with EC values of 0.6 (control), 4 and 8 dS/m-1. Salt stress induced changes in antioxidant enzymes, lipid peroxidation, leaf Na+ and K+ percentage and seedling growth. Salt treatment decreased shoots dry weight, root and shoot height, leaf RWC and leaf K+ percentage in salt sensitive cultivars (TC-11 and Holia) more than salt tolerant cultivars (Vendor and Vantage). The four cultivars showed an increase in malondialdehyde (MDA) content and Na+ percentage under salt condition, but the increase in sensitive cultivars were higher than that in salt tolerant genotypes. With increasing EC values, leaf K+ percentage was decrease in all cultivars, but this decrease was slowly in Vantage cultivar. The lesser degree of membrane damage and the higher activity of CAT and GR observed in NaCl treated plants of Vantage and Vendor indicated that these tomato cultivars had a higher capacity for the tolerant salinity in comparison with sensitive cultivars.
Farhoudi, R. (2013). EFFECT OF SALT STRESS ON GROWTH AND LIPID PEROXIDATION OF TOMATO (LYCOPERSICUM ESCULENTUM) CULTIVARS AT VEGETABLE STAGE. Acta Hortic. 971, 127-135
tomato, malondialdehyde, salt stress, sodium, potassium