Effect of salt stress on lipid peroxidation and superoxide dismutase and peroxidase activities of Lycopersicon esculentum and L. pennellii
2006
Koca, H. | Ozdemir, F. | Turkan, I.
In this study, a relationship between lipid peroxidation, the antioxidant defense system and salt stress in salt-sensitive cultivated tomato (Lycopersicon esculentum) and its salt-tolerant wild relative (L. pennellii) was established. Superoxide dismutase activities were significantly higher in the leaves of L. pennellii than in those of L. esculentum after 12 and 84 d. Peroxidase (POX) activity showed a gradual increase in both cultivars under 70 mM NaCl. When 140 mM NaCl was used, it significantly increased POX activity in L. pennellii after 6 and 84 d, whereas it showed no remarkable change in leaves of L. esculentum. A higher salinity tolerance of L. pennellii was also correlated with a lower lipid peroxidation, which might be due to a higher content of antioxidant enzymes studied.
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