ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of 1-MCP on membrane characteristics, antioxidant defense system and postharvest storage in Indian Sweet Red apple

Kochhar S. and Kochhar V.K.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.126

2004

บทคัดย่อ

This work was undertaken to study the role of antioxidant and cell wall degradating enzymes such as Superoxide dismutase (SOD), Peroxidase (POD), Catalase (CAT), Ascorbate peroxidase (APX), cellulase and lipid peroxidase during post harvest storage of Indian apples using 1-MCP. 1-MCP is a newly introduced ethylene blocker and is now well-known to increase the shelf life of flowers and fruits.

Fruits of apple cultivar Sweet Red (resembling Gala apples of Washington State USA) widely grown in Himachal Pradesh were selected for this study. Due to inadequate postharvest storage technologies, high cost of transportation and short shelf life much of this bumper crop goes waste every year causing loss of millions of rupees.

One set of 50 fruits of uniform size was kept as control while two other sets were treated with 0.5 and 1.0 mg L^-1 of 1-MCP for 24h and stored at room temperature subsequently. The enzyme activities and their isoenzyme patterns were determined periodically. The degradation of flavonoids, anthocyanins and ascorbate was also determined.

The results have shown that 1 ppm MCP treated fruits had an increased shelf life of 10 days at room temperature 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. The degradation of anthocyanin and ascorbic acid was also slower in the treated fruits. The activity of cell wall degrading enzymes was also inhibited.