PEROXIDASE ACTIVITY BETULA PENDULA USED AS INDICATORS OF THE URBAN ENVIRONMENT (BY THE EXAMPLE OF SARATOV)
The seasonal dynamics of peroxidase activity in leaves of Betula pendula within the heterogeneous urban area have been studied. Studying areas have been identified according to results of chemical analysis of atmospheric air. Peroxidase activity in tree leaves was carried out for several vegetation periods using photometric methods based on determination of benzidine oxidation. It was shown that peroxidase activity the most pronounced under the influence of various factors of the urban environment changes in early growing season. Experimentally established that the highest activity of peroxidase have plants growing in areas of major transport hubs of the city. Reduction of enzyme activity in leaves was observed in bedroom communities of city. Peroxidase activity in plants can be used as indicator of air pollution in a wide range of concentrations. This allows to integrate zones with different levels of pollution.