魔芋葡甘露聚糖-壳聚糖复合涂膜对北碚447锦橙贮藏品质的影响

Effect of Konjac Glucomannan Combined Chitosan Coating on Storage Quality of Beibei 447 (Citrus sinensis L.Osbeck cv.Jinchengbeibei 447)

为探究魔芋葡甘露聚糖-壳聚糖复合涂膜对北碚447锦橙贮藏品质的影响,分别采用0.5%魔芋葡甘露聚糖+1%壳聚糖复合涂膜,0.5%魔芋葡甘露聚糖涂膜和空白处理北碚447锦橙。以5 d为一个周期,15℃温度贮藏,共贮藏5个周期,测定贮藏期间果实的总糖、可滴定酸、V_C、固形物、总酚等指标。结果表明,复合涂膜处理可有效延缓果实品质的下降,与0.5%魔芋葡甘露聚糖涂膜和空白处理对比,复合膜组能够明显抑制果实总糖、可滴定酸、V_C、总黄酮、总酚含量的下降,减缓果实中丙二醛的积累,使锦橙保持了较好的果实品质。证明了复合涂膜处理相比单独0.5%KGM保鲜效果更好。

The storage quality of konjac glucomannan combined chitosan coating on citrus(C.sinensis L.Osbeck cv.Jinchengbeibei 447)was studied in this paper.The citrus were treated with 0.5%konjac glucan-mannan+1%chitosan,and 0.5%konjac glucanmannan.Total sugar,titratable acidity,V_C,soluble solids,total phenolics,total flavonoids,MDA were taken as the index to evaluate the quality of the citrus during storage.The results showed that,the citrus coated with liquid could keep a good quality,and the citrus coated with 0.5%konjac glucanmannan+1%chitosan could significantly inhibit the decrease content of total sugar,titratable acidity,V_C,soluble solids,total phenolics and total flavonoids.It could also significantly inhibit the increase of MDA.It was proved that 0.5%konjac glucanmannan+1%chitosan was better than 0.5%konjac glucanmannan in fresh-keeping.