Effect of Soil Applied Cobalt on Activities of Antioxidant Enzymes in Arachis hypogaea

The present investigation was executed with an objective to study the effects of Co stress in Arachis hypogaea L. with special emphasis on antioxidant enzymes activities which are the defense mechanism to any type of abiotic stress. In this we have analysed the effect of cobalt (Co) stress on antioxidant enzyme activities (catalase, peroxidase and polyphenol oxidase) of Arachis hypogaea L. were studied. The antioxidant enzymes like catalase, peroxidase and polyphenol oxidase activities were highly altered due to the abiotic stress resulted from cobalt stress. The antioxidant enzyme activities have beneficial value at 50 mg kg Co level in the soil, 1 when compared with control. Further increase in the Co level (100-200 mg kg ) in the soil have a negative effect 1 on these parameters. From these results it is clear that Antioxidant potentials acts as a protective mechanism in A. hypogaea under soil cobalt stress.