beta@壳聚糖保鲜涂层的制备及其对太谷梨枣品质的影响  

Preparation of beta@chitosan fresh-keeping coating and its effect on the quality of Taigu pear jujube

作　　者：王诗瑶 辛镇忠 王连 王愈[1] WANG Shiyao;XIN Zhenzhong;WANG Lian;WANG Yu(College of Food Science and Engineering,Shanxi Agricultural University,Jinzhong 030800,Shanxi,China)

机构地区：[1]山西农业大学食品科学与工程学院,山西晋中030800

出　　处：《浙江农业学报》2023年第9期2212-2221,共10页Acta Agriculturae Zhejiangensis

基　　金：山西农谷建设科研专项项目(SXNGJSKYZX201902);山西农业大学科技创新基金项目(2020BQ09,2020BQ49);山西省高等学校科技创新项目(2020L0145,2020L0171);山西省优秀博士来晋工作奖励资金科研项目(SXYBKY2019010,SXYBKY2019009)。

摘　　要：太谷梨枣因成熟期为雨季,采后常伴随开裂、发霉、品质下降等现象,致使其鲜果货架期缩短,商品性下降。为延长太谷梨枣的货架期,制备以beta分子筛为核相,壳聚糖为壳层的类核壳结构保鲜涂层,并探究二者不同配比对太谷梨枣采后品质的影响。通过对梨枣的硬度、失重率、细胞膜通透性、可溶性固形物含量的分析,筛选出beta分子筛与壳聚糖的最佳比例。结果表明:在贮藏70 d后,beta分子筛和壳聚糖质量比为1∶1.5的保鲜涂层处理的太谷梨枣呼吸速率为43.99 mg·kg^(-1)·h^(-1),硬度为4.99 N,与初始相比,硬度保留42%,失重率为2.45%,细胞膜通透性增加了48.67%,可溶性固形物含量下降。由此可见,beta@壳聚糖保鲜涂层在一定程度上能延缓太谷梨枣果实失重率和细胞膜通透性增加的速度,同时抑制硬度、可溶性固形物含量的下降,从而提高果实贮藏品质。Taigu pear jujube often appears unfavorable storage phenomena,such as cracking,moldiness and decline of quality after harvest because its mature period is rainy season.As a result,the shelf life of fresh fruit is shortened and the commodity quality has decreased.In order to extend its shelf life,a kind of core-shell structure fresh-keeping coating with beta zeolite as the core phase and chitosan as the shell phase was prepared,and the effects of different ratios of the beta zeolite and chitosan on the post-harvest quality of Taigu pear jujube were further explored.The best ratio of beta zeolite and chitosan in fresh-keeping coating was explored through testing the hardness,weight loss rate,cell membrane permeability and soluble solid content.The results showed that after 70 days,the respiratory intensity of Taigu pear jujube treated with the fresh-keeping coating with the quality ratio of beta zeolite and chitosan of 1∶1.5 was 43.99 mg·kg^(-1)·h^(-1),its hardness was 4.99 N.Compared to the initial situation,hardness remained 42%,its weight loss rate was 2.45%,its permeability of cell membrane increased by 48.67%,its soluble solid content decreased.These results suggested that beta@chitosan fresh-keeping coating could delay the increase of weight loss rate and cell membrane permeability of Taigu pear jujube to a certain extent,and inhibit the decrease of hardness and soluble solid content,thus improving the fruit storage quality.

关 键 词：太谷梨枣 壳聚糖 分子筛 货架期 

分 类 号：S665.1[农业科学—果树学] TS255.36[农业科学—园艺学]