Impact of the Ribav-Extra and low temperatures on the enzymatic activity of maize plants

We studied the impact of the Ribav-Extra on activity of catalase and ascorbate peroxidase in the leaves of maize plants under the conditions of low-temperature stress. It was revealed that activity of enzymes decreases under the impact of low temperature. Growth regulator affects activity of enzymes during cooling if there is pre-treatment of maize seed. Enzyme activity has depended on the Ribav-Extra concentration. Recovery of enzyme activity have been observed after termination of cooling. 10 -6 % and 10 -7 % Ribav-Extra concentrations are the most effective.