Effects of chitosan treatment on postharvest quality of wolfberry fruit packed with plastic film during low temperature storage

Fresh fruit of wolfberry(cv. Ningqi No. 1)were dipped with chitosan at 2. 5g/L and 5. 0g/L for 3min. The postharvest characteristic of treated fruit was studied under packed with polyethylene film and stored at low temperature(0±1)℃. The results indicated that chitosan treatment significantly reduced the rotting rate,32. 0% and 76. 2% lower in fruit treated at 2. 5g/L and 5. 0g/L when compared with the control after 24 days of storage. The treatment noticeably delayed the decrease of soluble solids content and maintained titratable acid content. However,no significant difference was found on weight loss during storage of fruit. The wolfberry treated with chitosan at 5. 0g/L had better flavor and green fruit stem after 30 days of storage when evaluated sensory quality. It was suggested that chitosan treatments could be used as a postharvest handling measure for fresh wolfberry fruit.