ISSN: 0024-1148 Russian Journal of Forest Science. 2012, No. 3, pp. 69-76
| ACTIVITY OF THE ANTIOXIDANT SYSTEM IN CONIFEROUS STANDS OF DIFFERENT DENSITY |
| Milyutina I.L., Sudachkova N.E., Romanova L.I. Forest Institute, Siberian Branch of the Russian Academy of Sciences (FI SB RAS):Academgorodok 50 bldg. 28, Krasnoyarsk, 660036 |
E-mail: biochem@ksc.krasn.ru |
Received: 22 october 2010
The effect of intraspecifi c competition on biometric parameters, the content of photosynthetic pigments, glutathione, ascorbic and dehydroascorbic acids, hydrogen peroxide, and the activity of antioxidant enzymes - superoxide dismutase, peroxidase, ascorbate peroxidase, and catalase - were investigated in needles of Pinus silvestris L., P. sibirica Du Tour, Larix sibirica Ledeb, and Picea obovataLedeb during growing periods. Under the intraspecifi c competition, some features of oxidative stress were shown to detect in the needles of all the species studied. The level of the peroxidase activity can be a marker of the stress state of coniferous trees.