Abstract
This article considers the concentration of lead, polyphenols and water-soluble antioxidants (AOA) in the leaves of 4 species of woody, 11 species of shrub and 7 species of herbaceous plants growing in different functional zones in the city of Kaliningrad. The accumulations of Pb – the principal pollutant in urban ecosystems – were studied in the urban topsoil and plant leaves. An increase in Pb concentration in soils was associated with a decrease in AOA in tissues of the species examined. Changes in the background concentrations of antioxidants make it possible to estimate plant resistance to environmental stresses. The authors examine the contribution of polyphenols to the antioxidant potential of urban plants in soil polluted by Pb. The results obtained can be used to determine urban plant resistance to human impact and to improve the monitoring of industrial pollution in urban areas.
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