Morphology and physiology of the plants can be affected by the production of Reactive Oxygen Species (ROS). Peroxidases Class III enzymes are scavenge ROS and protect from the stress, improve plant productivity. We studied the seasonal and ploidy level variations in peroxidase (POX) and catalase (CAT) activitiesin eight colhitetraploids and their putative diploids of mulberry in Summer, Rainey and Winter seasons. Enzymatic assay was done by using substrates Hydrogen peroxide (H2O2) and Guicolfor CAT and POX respectively. Activities of POX and CAT were high in summer season, and in diploids. Within the ploidy, genotypes showed varied activities of POX and CAT. This information helps in selection of stress resistant genotypes and improves the activities of triploidy breeding programme.
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