Effects of Chitosan/Starch/Apple Polyphenol Composite Film on Fresh-keeping Effect of Agaricus bisporus

The chitosan/starch/apple polyphenol composite film was prepared with chitosan, starch and apple polyphenol as raw materials.The fresh Agaricus bisporus were divided into 4 groups, 4 ℃ control group, 4 ℃+ composite film treatment group, 8 ℃ control Group, 8 ℃ + composite film treatment group.The Agaricus bisporus were coated with composite film in the treatment group, and the Agaricus bisporus were not coated in the control group.The effect of composite film on respiration rate, ethylene release, hardness, browning degree, vitamin C and enzyme activity of Agaricus bisporus during storage（0,4,8,12,16,20 days） were studied, in order to provide reference basis for the preservation effect of composite film coating on Agaricus bisporus.The results showed that chitosan/starch/apple polyphenol composite film could significantly reduce ethylene release, weight loss rate, browning degree, respiration rate, MDA content and PPO activity during storage of Agaricus bisporus.It could inhibit the decrease of hardness, vitamin C,total phenol, soluble sugar, soluble protein content and SOD activity.When stored at 4 ℃ and 8 ℃,the freshness index of Agaricus bisporus in chitosan/starch/apple polyphenol composite film treated groups was better than that of the control group.The results showed that chitosan/starch/apple polyphenol composite film could delay the quality degradation of Agaricus bisporus during storage.