Biochemical changes in peroxidase, polyphenol oxidase, superoxide diemutase and catalase activities of potato rat different stages of development

Four enzymes peroxidase, polyphenal oxidase superaxide dismutase and catalase were studied in potato tuber cultivar 'ALPHA' at different stages of development by using PAGE PoroPAGE and PAGIF electrophoresis. The activities of the four enzymes are positively related to each other through tuberization and maturation. In contrast to other plants which lime been reported So contain multiple forms of catalase, only one fourm of this enzyme was revealed in potato sap Peroxidase was detected as 9 bands after PAGE and 10 bands after PoroPAGE with MW between 20-134 KDa Superoxide dismutase was detected as 10 bands after PoroPAGE and 6 bands after PAGE with MW between 10-120 KDa. Our results showed that the four enzymes have been involved in growth and development