复合涂膜处理对蜂糖李采后低温贮藏品质的影响  

Effect of Composite Coating Treatment on Quality of Fengtang Plum in Low Temperature Storage

作　　者：汪凯莎[1] 何映霞[1] 陶冶 WANG Kaisha;HE Yingxia;TAO Ye(Anshun University,Anshun 561000,China;Guangdong Eco-Engineering Polytechnic,Guangzhou 510520,China)

机构地区：[1]安顺学院,贵州安顺561000 [2]广东生态工程职业学院,广东广州510520

出　　处：《食品科技》2023年第7期29-36,共8页Food Science and Technology

基　　金：贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]325);安顺市科技计划项目(安市科农[2018]17)。

摘　　要：在质量体积分数2.0%的大豆分离蛋白(Soy protein isolate,SPI)溶液中分别加入质量体积分数2.0%的壳聚糖(Chitosan,CS)、海藻酸钠(Sodium alginate,SA)、普鲁兰多糖(Pullulan,PUL)和阿拉伯胶(Gum Arabic,GA)4种多糖溶液,制成复合涂膜材料,通过分析56 d贮藏期内腐烂率、失重率、硬度、可溶性固形物(Soluble solids content,SSC)、可滴定酸(Titratable acidity,TA)、固酸比、维生素C、褐变度以及丙二醛(Malondialdehyde,MDA)含量的变化,研究不同复合涂膜液对蜂糖李采后低温(4±2)℃贮藏品质的影响。测定结果结合因子分析表明:4组复合涂膜保鲜效果均好于大豆分离蛋白单一涂膜和对照组,(SPI+GA)组在56 d贮藏期内综合表现最好,且在抑制果实腐烂、SSC、TA,控制固酸比和保持硬度方面均有较好的效果;(SPI+SA)组抑制MDA含量增加的效果最好;(SPI+PUL)组减低失重率和减少褐变度效果最好;(SPI+CS)组维持果实维生素C含量效果最好。The composite coating materials were prepared by adding 2.0%(w/v)chitosan(CS),sodium alginate(SA),pullulan(PUL)and gum arabic(GA)separately into the 2.0%(w/v)of soy protein isolate(SPI)solution.By analyzing the content changes of decay rate,weight loss rate,hardness,soluble solids content(SSC),titrable acid content(TA),solid acid ratio,vitamin C content,browning degree and malondialdehyde content(MDA)during the 56 days storage period,the preservation effect of different composite coatings on postharvest Fengtang plum stored at low temperature(4±2)℃was researched.The results show that the preservation effect of the four groups of composite coating were all better than that of the single coating of soy protein isolate group and the blank control group.The(SPI+GA)group had the best comprehensive performance during the 56 days storage period,and performed well effects in inhibiting fruit decay,SSC,TA,controlling solid acid ratio and maintaining hardness;(SPI+SA)group inhibiting the increase of MDA content,(SPI+PUL)group showed the best effect in reducing weight loss rate and browning degree respectively and(SPI+CS)group,maintaining the vitamin C content.

关 键 词：蜂糖李 大豆分离蛋白 壳聚糖 海藻酸钠 普鲁兰多糖 阿拉伯胶 贮藏品质 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]