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Response of the antioxidant system of light-demanding and shade-bearing pine species to phytocenotic stress

Author:
Milyutina, I. L., Sudachkova, N. E., Romanova, L. I.
Source:
Contemporary problems of ecology 2013 v.6 no.2 pp. 149-155
ISSN:
1995-4255
Subject:
Pinus sibirica, Pinus sylvestris, antioxidants, ascorbate peroxidase, ascorbic acid, catalase, chlorophyll, dehydroascorbic acid, glutathione, glutathione-disulfide reductase, hydrogen peroxide, peroxidase, stand density, superoxide dismutase, trees, vegetation
Abstract:
The effect of stand density on the antioxidant system of Scots Pine (Pinus silvestris L.) and Siberian Pine (Pinus sibirica Du Tour) was studied. The dynamics of concentrations of chlorophyll, hydrogen peroxide, glutathione, ascorbic acid, and dehydroascorbic acid were investigated during the vegetation period. In addition, the activities of superoxide dismutase, catalase, peroxidase, glutathione reductase, and ascorbate peroxidase were observed in the 1-year needles of 26-year-old trees with an initial stand density of 0.5 and 128 thousand individuals ha⁻¹.
Agid:
81592