Effect of 1-MCP Combined with Different Fresh-keeping Bags on Quality of ‘Fuji’Apple During Storage

To understand suitable approach of "Fuji" apple for retaining freshness under refrigerated conditions,in(0±1) ℃ storage conditions,the effects of microporous and punched plastic bags combined with small package portable 1-MCP treatment(treatment dose:0.875 μL/L)on the hardness,appearance color,TSS content,TA content,MDA content,POD activity and PPO activity of ‘Fuji’apple were studied. There were 5 treatments in the test:Carton lined with microporous film packaging,carton lined with microporous film packaging add 1-MCP,carton lined with punched film packaging,carton lined with punched film packaging add 1-MCP processing,carton packed with bare fruit without any packaging as control(CK). The results showed that 1-MCP combined with plastic bag treatment could effectively delay the decline rate of hardness,TSS and TA of Fuji apple fruit,inhibit the decrease of a^* value and the increase of b^* value,reduce the production of MDA at the later stage of storage,maintain POD activity at a higher level,effectively inhibit PPO activity and delay the peak of PPO activity. Among them,the microporous adding 1-MCP treatment had the best effect. At the storage of 225 days,the TA content of microporous plastic bags combined with 1-MCP treatment was 0.12%. The hardness of the microporous plastic bag combined with 1-MCP was 5.78 kg/cm²,MDA content was the lowest(9.63 mmol/g),POD activity was the highest(15.47 U/(min·g)),PPO activity was the lowest(8.82 U/(min·g)),and these indicators were significantly different from the CK(P<0.05). Therefore,it is recommended to use microporous plastic bags and small packages of 1-MCP treatment agent for internal packaging.