Changes in the activity of antioxidant enzymes in vegetative organs Populus nigra L. in the matter of environmental contamination

V. Bilchuck, A. Rossikhina-Galycha

Oles Gonchar Dnipropetrovsk National University
72, Gagarin Ave., Dnipropetovsk 49010, Ukraine

The changes in the activity of the main oxidoreductases in vegetative organs of Populus nigraL. under the action of multicomponent pollutants during ontogenesis are revealed. It is established, that at chronic action of pollutants an activation of superoxide dismutase (SOD), catalase and peroxidase in different stages of phenological cycle is occured. Thus SOD activity of the investigated plants exceeds the control in 1.51.7; peroxidase in 1.31.5, catalase to 1.42.1 times depending on the development phase and duration of stress factor. Increased activity of oxidoreductases confirms the gas resistance of Populus nigra L. in conditions of aerogenic contamination. The presence of correlation between the antioxidant activity of the vegetative organs of plants in the process of ontogenetic development is revealed. The equations of regression are adduced.

Keywords: Populus nigra L., vegetative organs, environmental contamination, antioxidant enzymes, superoxide dismutase, catalase, peroxidase

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