[Effect of the salt stress and synthetic growth regulators on catalase and peroxidase activity in corn seedlings]

Activity modifications of two enzymes included in antioxidant system have been studied in roots and leaves of corn seedlings during 10-day exposition to 0.1 M NaCl. In roots of salt-stressed seedlings both activities were reduced but their decreasing was changed at rising at the exposition end. The changes of catalase activity in corn leaves had the same character but peroxidase one rose greatly and was considerable higher than in the leaves of the control seedlings. Seed pretreating with preparations methiure and ivine enhanced activities of the both enzymes in roots whereas in leaves they increased catalase activity only. Obtained results demonstrate that under the salt stress conditions catalase and peroxidase activities are directed to the maintenance of prooxidant-antioxidant balance, and methiure and ivine, that reveal the antioxidant properties, induce enzyme activities.