壳聚糖涂膜对采后李果实贮藏品质及腐烂的影响

Effects of Chitosan Coating on the Storage Quality and Decay of Post-harvest Plum Fruit

研究了不同浓度(0,5,10,20 g/L)壳聚糖溶液涂膜处理对采后低温贮藏(2℃)下"牛心"李果实在硬度、可溶性固形物、抗坏血酸、转色情况及腐烂率的影响。研究结果表明:5,10,20 g/L壳聚糖涂膜均可以有效保持李果实贮藏品质,推迟果实转色,减少腐烂损失。在贮藏4周时,经10 g/L壳聚糖涂膜的李果实硬度比对照高61.43%;用20 g/L壳聚糖处理的李果实转红指数和腐烂率分别比对照低59.8%和52.9%。壳聚糖涂膜还可以延缓果实可溶性固形物含量上升、抗坏血酸含量的下降。

Effects of different concentration of chitosan （0,5,10 or 20 g/L） coating on the fruit firmness, soluble solids content, ascorbic acid, color changing and decay of post-harvest plum （Prunus salicina Lindl cv. Niuxin） fruit during the cold storage at 2 ℃ were studied. The Results showed that treatments with 5, 10 or 20 g/L of chitosan on the plum fruit could effectively maintain the storage quality, delay the fruit color changing and decrease decays. Fruit firmness of the fruit treated with 10 g/L was 61.43% higher than that of the control fruit after the storage for 4 weeks. The index of color change and the decay rate of plum fruit treated with chitosan caoting of 20 g/L were 59.8% and 52.9% lower than that the control fruit respectively. Chitosan coating also delayed the increase of soluble solids content and decrease of ascorbic acid.