Combined effects of ethylene scavenging-active packaging system and modified atmosphere to reduce postharvest losses of ethylene sensitive produce: Banana and kiwifruit

Abstract

Ethylene scavenging-active packaging is getting more interest to reduce postharvest losses of ethylene-sensitive produce to overcome the limitations of traditional postharvest technologies. The aim of this study is to monitor behaviour of ethylene-sensitive products to different ethylene scavenging systems combined with modified atmosphere packaging (MAP). Banana (Musa paradisicum L. var. Anamur) and kiwi (Actinidia deliciosa L. var. Hayward) were packaged with low-density polyethylene (LDPE) bags containing ethylene scavenging sachet and ethylene scavenging-active LDPE bags. Only passive MAP was used for bananas stored at 13 & DEG;C for 12 d. Both passive and active MAP (5% O-2, 5% CO2) were used for kiwi stored at 4 & DEG;C for 30 d. LDPE bags with no ethylene absorber and unpackaged produces were the control groups. O-2, CO2 and ethylene concentrations, mass loss, texture, colour, TSS %, titratable acidity and sensory analysis were performed during storage. O-2% in the control LDPE bags decreased below 2% on 6th d, while LDPE bags containing sachet and active LDPE bags remained above critical O-2 level for bananas during the entire storage. The lowest ethylene concentration was 0.45 & mu;l L-1 in both active systems on 12th d. Equilibrium atmosphere was maintained in active and passive MAP after 5th d for kiwifruit. The lowest ethylene concentrations were determined as 0.47 & mu;l L-1 and 0.50 & mu;l L-1 in the sachet included LDPE and active LDPE, respectively under passive MAP at the end of the storage. In conclusion, bananas packaged with both active systems were acceptable for 9 d considering physicochemical and sensory properties. The kiwifruit was acceptable for 30 d using both ethylene absorbing systems under passive MAP.