梯度预冷复合低温贮藏对大五星枇杷采后品质的影响  

Effect of gradient precooling combined with low-temperature storage on postharvest quality of Dawuxing loquats

作　　者：郑现容 鲜双 谢鸿林 杨爽 王语诗 何绍林 张鑫梅 罗家成 伍思阳 牟春玲 罗曼 陈安均[1] ZHENG Xianrong;XIAN Shuang;XIE Honglin;YANG Shuang;WANG Yushi;HE Shaolin;ZHANG Xinmei;LUO Jiacheng;WU Siyang;MOU Chunling;LUO Man;CHEN Anjun(School of Foood Science,Sichuan Agricultural University,Ya’an 625000,China)

机构地区：[1]四川农业大学食品学院,四川雅安625000

出　　处：《食品与发酵工业》2024年第22期254-260,共7页Food and Fermentation Industries

基　　金：川渝地区优势果蔬冷链贮运关键技术研究与示范(2021YFQ0071);四川省水果产业创新团队(SCCYCXTD2023-04)。

摘　　要：低温贮藏是目前使用最广的保鲜方法,然而枇杷在低温环境下容易遭受冷害。该实验以常温(20℃)为对照组,研究不同梯度预冷复合低温贮藏(11→8℃、11→8→5℃、11→8→5→2℃)对大五星枇杷贮藏品质的影响。结果表明,11→8→5℃处理能够显著保持枇杷果实的良好外观,有效抑制果实的褐变度、硬度、木质素和丙二醛含量的上升,以及可溶性固形物、总酸、抗坏血酸以及出汁率的下降。此外,保持较低水平·O_(2)^(-)的产生速率和H_(2)O_(2)含量,抑制苯丙氨酸解氨酶和多酚氧化酶活性上升,维持较高的超氧化物歧化酶和抗坏血酸过氧化物酶活性。这说明,11→8→5℃处理能够有效延长枇杷的贮藏期限,并避免低温冷害,保持良好的采后品质。该研究旨在探究梯度预冷复合低温贮藏对枇杷保鲜的可行性,为枇杷采后贮藏提供理论依据和技术支持。Low-temperature storage is currently the most widely employed preservation method,however,loquat is susceptible to chilling injury in low-temperature environment.Therefore,this study aimed to investigate the effect of different gradient precooling combined with low-temperature storage(11→8℃,11→8→5℃,11→8→5→2℃)on the storage quality of Dawuxing loquat compared to a control group at normal temperature(20℃).Results showed that the 11→8→5℃treatment significantly maintained the desirable appearance of loquat fruits,effectively inhibited the increase of browning degree,hardness,and lignin and malondialdehyde contents.Moreover,it prevented a decrease in soluble solid,titritable acidity,ascorbic acid,and juice percentage in fruits.Additionally,this treatment kept the·O_(2)^(-)production rate and the content of H_(2)O_(2)at a low level,inhibited the increase of the activities of phenylalamine ammonia lyase and polyphenol oxidase,but maintained the high activities of superoxide dismutase and ascorbate peroxidase.Consequently,the 11→8→5℃treatment can effectively prolong the storage life of loquat,avoid chilling injury,and maintain good postharvest quality.This study aims to explore the feasibility of combining gradient precooling with low-temperature storage for loquat preservation while providing theoretical basis and technical support for postharvest storage practices.

关 键 词：大五星枇杷 梯度预冷 低温贮藏 贮藏品质 冷害 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]