壳聚糖处理对遂川金柑贮藏效果的影响

Effects of Chitosan Treatment on Storage of Suichuan Kumquat Fruit

以遂川金柑为研究对象,用质量体积比为0.5%,1.0%,1.5%,2.0%4种壳聚糖溶液处理后在温度为(7±1)℃、湿度为85%～90%的条件下贮藏,并测定其贮藏期间的生理生化指标变化情况。结果表明,壳聚糖处理能够有效降低金柑腐烂率、失重率和呼吸强度,延缓Vc含量、可滴定酸含量、总糖含量、可溶性固形物含量及可溶性蛋白质的下降;同时,壳聚糖处理还能不同程度地推迟果实SOD和CAT活性高峰的出现,从而有利于维持果实贮藏过程中的品质,其中以质量体积比0.1%壳聚糖溶液处理效果最好。

Suichuan kumquat fruit was treated with 0.5%,1.0%,1.5%,2.0% chitosan,then stored at T：（7±1）℃and RH：85%-90%,the changes of postharvest physiology and quality in fruit during storage were investigated.The results showed that chitosan treatment significantly decreased the rotting rate,weightlessness and respiration rate,and deferred the decrease of Vc content,titratable acid,total sugar,total soluble solids and total soluble protein.In the meanwhile,chitosan treatment could also postpone fruit＇ SOD and CAT activity peak,then chitosan treatments could maintain Suichuan kumquat fruit＇ quality during storage.1.0% chitosan was the best treat concentration.