Effect of 1-MCP on postharvest storage of guava and antioxidant enzyme activities.
Kochhar V.K., Kochhar S.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.60
2004
บทคัดย่อ
Effect of 1-MCP on postharvest storage of guava and antioxidant enzyme activities.
Guava is an important fruit crop of North Indian Plains.The fruits are rich in vitamin C, pectins and nicotinic acid, phosphorus and soluble fibres.Guavas are considered as poor man’s apple in India.But guavas are highly perishable having a very short shelf life.Therefore, this work was conducted with an aim to increase the shelf life and to study the underlying biochemical changes.Fruits of L-49 (Lucknow 49-a locally grown cultivar) were selected for their uniform size and maturity.One set of 50 fruits was kept as control while two other sets of equal number were treated with 0.5 and 1.0 mg L-1 of 1-MCP for 24 h.The fruits were then stored at room temperature.The activities and isoenzyme pattern of antioxidant enzymes such as Superoxide dismutase (SOD), Peroxidase (POD), Catalase (CAT) and Ascorbate peroxidase (APX) were determined at periodic intervals.The degradation of flavonoids, anthocyanins and ascorbate was also determined.
The results have shown that 1-MCP treated fruits showed increased shelf life of 10 days as compared to 2-3 days in control.The treated fruits retained their colour and firmness for a longer time.The activities of SOD and CAT were higher while POD and APX activity were lower in treated fruits.There were some marked differences in the isoenzyme patterns of theses antioxidant enzymes.The degradation of anthocyanin and ascorbic acid was also slower in the treated fruits.This is the first report of antioxidant enzymes and isoenzyme pattern as affected by 1-MCP in guavas.