Estimation of some non-enzymatic antioxidants in leaves of Betula platyphylla Sukacz. and Larix sibirica Ledeb.

The study of plant stress tolerance in Mongolia is based on the estimation morphological and physiological parameters without taking into consideration enzyme activity non-enzymatic antioxidant contents. latter are more sensitive to various environmental stresses, their accurate would provide a means monitor health indirectly determine response. This paper presents our antioxidants as chlorophylls (Chl Chl b), total carotenoids (TC), ascorbic acid, proline malondialdehyde, biomarker oxidative leaves two species grown urban natural environments during vegetation period. results indicate that there was significant decrease pigments ratio : b TC а + в)), an increase malondialdehyde contents plants.