Heavy Metals Induce Lipid Peroxidation and Affect Antioxidants in Wheat Leaves |
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Authors: | SK Panda I Chaudhury MH Khan |
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Institution: | (1) Plant Biochemistry Laboratory, School of Life Sciences, Assam (Central) University, Silchar-, 788011, India |
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Abstract: | The possible role of Zn and Cr as catalytic inducers of free radicals in wheat leaves was investigated. Treatment of excess
heavy metals decreased the chlorophyll and carotenoid content in wheat leaves with the increase in time of excision. A sharp
increase in proline accumulation was marked with the increase in metal concentration. Total peroxide content and lipid peroxidation
measured as malondialdehyde content showed uniform increase under metal treatment in excised leaves. At almost all concentrations,
catalase, guaiacol peroxidase and superoxide dismutase activities decreased with a minor increase in the earlier days of excision.
Though glutathione content decreased ascorbate content showed significant increase in wheat leaves under heavy metal treatment.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | catalase chromium guaiacol peroxidase superoxide dismutase Triticum aestivum zinc |
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