Changes in antioxidant system of potato tuber during low temperature storage in relation to sweetening development.

摘要

Potato tubers of variety 'Kufri Chipsona-1' were stored for 4 weeks at 4 and 12 degrees C and the glucose, sucrose, ascorbic acid and phenol contents and the ascorbate peroxidase and glutathione reductase activities were monitored at weekly intervals. The results showed that the contents of free sugars and ascorbate were greater at lower than higher storage temperature. Both enzymes showed higher activities at 4 degrees C than at 12 degrees C. Greater oxidative damage to cellular membranes at lower storage temperatures resulted in higher accumulation of free sugars.