葡萄籽提取物、壳聚糖及其复合处理对鸭梨贮藏品质的影响

Effects of grape seed extract and chitosan treatments on postharvest quality of Yali pear fruit

研究葡萄籽提取物(GSE)、壳聚糖(CTS)及其复合处理对鸭梨(Pyrus bretschneideriRehd.)果实贮藏品质的影响。0.05MPa负压下,将鸭梨于不同浓度的GSE溶液、CTS溶液以及GSE+CTS复合溶液中浸泡2min,恢复至常压后继续浸泡3min。取出晾干,于20℃,85%～95%RH贮藏。结果显示,各处理均有效保持了果实硬度,延缓了可溶性固形物(SSC)含量和可滴定酸(TA)含量的下降;1.5%GSE处理、CTS处理及GSE+CTS复合处理降低了腐烂率和失重率;GSE处理和GSE+CTS复合处理降低了果柄褐变指数,且本实验中GSE对果柄褐变指数的影响呈现浓度效应。

Effects of grape seed extract（GSE） and chitosan（CTS） treatments on the postharvest quality of Yafi pear （ Pyrus bretschneideri Rehd. ） fruit were investigated. Pears were immersed in GSE （0. 1%, 1.0%, 1.5 % ）, CTS （1 % ） and CTS（ 1.5% ）plus GSE（0.5% ）separately for 2min with a negative pressure of 0.05MPa and 3min with normal pressure.Then the pears were air-dried, packaged, and stored at 20℃, 85%-95% RH for further observation. Results indicated that postharvest fungal rot and weight loss of the pears were all reduced significantly by GSE and CTS treatments, alone or combined. Meanwhile, an inhibitory effect was observed on stem browning of Yafi pears by the GSE treatment,and the brown stem index had a negative correlation with the concentration of GSE. Beneficial effects on postharvest quality were also shown in terms of delaying firmness,soluble solids content,and titratable acidity declining.