Superoxide dismutase and peroxidase activities in ripening mango (Magnifera indica L.) fruits.
Reddy Y. V., Srivastava G. C.
Author Affiliation: Division of Plant Physiology, Indian Agriculture Research Institute, New Delhi - 110 012, India.
Indian Journal of Plant Physiology 8 : 115-119
Abstract : Loss in fresh weight and increase in respiratory activity along with ethylene peaks were recorded in ripening mango cv. Baneshan in an orchard in Sanga Reddy, Andhra Pradesh, India. Antioxidant enzymes, like superoxide dismutase (SOD) and peroxidase (POD), were noticed to be very high at the mature green stage, which significantly declined as the ripening proceeded. These antioxidant enzymes exhibited higher activities in the epicarp than in the mesocarp at all the stages of ripening. The isoenzyme pattern of SOD was observed to be the same at all the stages of ripening in both epicarp and mesocarp, but intensity of bands differed. Peroxidase also exhibited difference in isoenzyme pattern and intensity of bands. There was only one band at the mature green stage, whereas three bands were recorded at the partial ripe and full ripe stages. However, the intensity of bands were higher in the epicarp than in the mesocarp.