Effect of nickel on antioxidative enzyme activities, proline and chlorophyll contents in wheat shoots
2006
Gajewska, E. | Sklodowska, M. | Slaba, M. | Mazur, J.
Effect of two Ni concentrations (10 and 200 microM) on growth, Ni accumulation, chlorophyll and proline contents, relative water content (RWC) as well as the activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and glutathione S-transferase (GST) were studied in shoots of wheat plants. The treatments used caused a considerable accumulation of Ni in the shoots. However, exposure of plants to 10 microM Ni did not lead to significant alterations in shoot growth except for a slight increase in fresh mass. The other variables studied were not affected. In contrast, 200 microM Ni caused shoot growth inhibition, a decline in RWC and chlorophyll content, accumulation of proline and occurrence of visible symptoms of Ni toxicity. The activities of SOD and CAT decreased in response to 200 microM Ni. Conversely, several-fold enhancements of POD and GST activities were observed following the 3rd day of 200 microM Ni treatment.
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