AIT生物包装调控蓝莓货架品质及抗氧化活性研究

探讨以聚乳酸/甜菜皮(PLA/TSBP)为基材的生物包装经异硫氰酸烯丙酯(AIT)精油抗菌涂层处理后对蓝莓果实货架品质和抗氧化活性的影响。以蓝莓为试材，考察AIT生物包装、AIT精油和对照3种处理方法的保鲜效果。结果表明:AIT生物膜可有效抑制蓝莓青霉菌和灰霉菌孢子生长，孢子发芽率分别为15%和26%(对照均>90%)；芽管长度分别为35和65 μm(对照>90 μm)，腐烂率降低60%；4 ℃贮藏15 d，生物包装处理果实硬度为对照的1.5倍，蔗糖、果糖分别为对照2倍和1.7倍。AIT/壳聚糖生物包装有效维持蓝莓果实总黄酮、多酚水平。研究结果可为生鲜蓝莓低温贮运提供参考。

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.