Kurylenko I. Peroxide oxidation processes in corn seedlings under salt stress conditions

The dissertation is devoted to investigation of intensity of peroxide oxidation, activity of antioxidant enzymes and H+-ATPase of plasma membrane in corn seedlings under the salt stress conditions and possibility to correct these processes by synthetic preparations methyure and ivine. It was determined that NaCl-induced stress led to increase of peroxide oxidation processes in roots and leaves of corn seedlings, at that their intensity depended on power and term of stress effect. Changes of peroxidation level under salt stress conditions are accompanied by simultaneous enhance of SOD activity and gradual activation of catalase and non-specific peroxidase. At that time it was established the inhibition of H+-ATPase of plasma membrane from corn seedling roots that supply the energy for Na+ extrusion. It was shown that treatment by compounds, especially methyure, led to normalization of peroxide oxidation processes and increased the activity of antioxidant enzymes and H+-ATPase of plasma membrane in cornseedlings under salt stress conditions, and also decreased inhibition effect of NaCl on growth processes. It is possible to proposed methyure and ivine using for salt-tolerance increase of plants.