Effect of AIT-Bio-Film on the Quality and Antioxidant Activity of Blueberry During the Cold Shelf-life

The study aimed to investigate the preservation effects of PLA/SBP bio-film coated AIT on the blueberry with the mode of head-space releasing. In this paper, we studied the preservation effect of American biopackaging, AIT essential oil and control of 3 treatment methods. The results show that the biofilm significantly inhibits the growth of blue and grey mold infects in the fruit tissues during the cold storage in 15 d. The conidial germination of P. expansum or Botrytis cinereaare 15% and 26% after treatment (the control is higher than 90%); the germ tube length (μm) of P. expansum or Botrytis cinerea on blueberry are 35 and 65 μm with AIT-active film (the control is than 90 μm greater), which decreased the rotting rate to 60%. At 4 ℃ for 15 days, the blueberry samples AIT/chitosan package treated possess an excellent hardness which is 1.5 times than control, and the sucrose and fructose are 2 times and 1.7 times. The bio-preservation film is helpful to maintain the general flavone, polyphenol level in blueberry. Therefore, the study may support a scientific reference for the further research of blueberry.