The leaf lamina lipid peroxidation (LP) intensity dynamics of birch (Betula pendula Roth.) growing in two Nizhny Novgorod biotopes with different anthropogenic loads (Gagarin Avenue and the Kremlin territory) has been investigated. The dynamics was similar in both biotopes: the highest content of LP products was observed in early June with its subsequent decrease and relative stabilization. In June-July the leaf lamina LP intensity level was higher for the birch growing in the biotope with a greater anthropogenic load. In September the distinctions between the biotopes disappeared.
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