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- Title
Enzymatic antioxidants in tomatoes and sweet bell pepper fruits under abiotic factors.
- Authors
Priss, Olesia; Kalytka, Valentina
- Abstract
Introduction. In order to maintain normal metabolism in the fruit separated from the mother plant and to protect plant tissues from oxidative damage the complex of highmolecular antioxidants is especially important. Materials and methods. Fruits of tomatoes and sweet bell peppers grown under field conditions during the 2005-2012 years were studied. Catalase and peroxidase activity was determined by undecomposed rest titration of hydrogen peroxide. SOD activity was determined by its ability to inhibit the reaction of adrenaline auto-oxidation with a modification in the preparation of raw materials. The content of malondialdehyde was determined by thiobarbituric acid method. Results and discussion. Activities of superoxide dismutase and catalase in both solanaceous vegetables are inversely correlated with the sum of temperatures of fruit development and ripening period. Rainfall induces activity of these enzymes in the pepper fruits, but do not affect on tomatoes. Peroxidase activity inversely correlates with the sum of temperatures of fruit development and ripening period for both cultures (r=-0,63...-0,69). For tomatoes, from all of the above mentioned antioxidant enzymes, peroxidase is the most dependent upon weather factors. Peroxidase activity is directly dependent on the amount of rainfall during the development and ripening of the fruit for both cultures. Peroxidase activity is also dependent on rainfall of the whole vegetation period for pepper. Conclusion. The sum of temperatures during fruit development and ripening has determining influence on the activity of antioxidant enzymes in tomatoes and pepper (r=-0,58...-0,76).
- Subjects
TOMATO seeds; BELL pepper; CAPSICUM annuum varieties; ANTIOXIDANTS; CATALASE; PHYSIOLOGICAL effects of hydrogen peroxide; PHYSIOLOGY
- Publication
Ukrainian Food Journal, 2014, Vol 3, Issue 4, p505
- ISSN
2304-974X
- Publication type
Article