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

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.