Antioxidant activity in the leaves of <Emphasis Type="Italic">Melilotus albus</Emphasis> and <Emphasis Type="Italic">Trifolium medium</Emphasis> from man-made disturbed habitats in the Middle Urals under the influence of copper |
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Authors: | E R Fazlieva I S Kiseleva T V Zhuikova |
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Institution: | 1.Gorkii Ural State University,Yekaterinburg,Russia;2.Nizhnii Tagil State Social and Pedagogical Academy,Nizhnii Tagil,Russia |
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Abstract: | Physiological mechanisms of adaptation to copper-induced stress in two widespread legume plants, white sweet clover (Melilotus albus Merik.) and zigzag clover (Trifolium medium L.), growing in habitats differing in the man-made pollution. An antioxidant plant defense system was activated in response
to 10 mM CuSO4, which is a stress factor. Specific biochemical features related to adaptation to soil contamination with copper were observed
in tested plant species. Superoxide dismutase was activated in response to stress in both species from various habitats. M. albus from the impact zone manifested the better capacity of proline accumulation as compared with plants from less polluted habitats.
T. medium plants from the impact zone contained more active peroxidase. It was suggested that plants growing for a long time under
stressful conditions manifest the greater tolerance to copper ions than plants, which did not experience stress or were subjected
to the milder stress. |
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