短波紫外线辐射处理对刺梨果实贮藏品质的影响  

Effect of UV-C treatment on storage quality of Rosa roxburghii Tratt

作　　者：张志敏 冉旭勇 侯发民 李建新 李晓明[2] 章建军 ZHANG Zhimin;RAN Xuyong;HOU Famin;LI Jianxin;LI Xiaoming;ZHANG Jianjun(College of Agroforestry Engineering and Planning/Guizhou Key Laboratory of Biodiversity Conservation and Utilization in the Fanjing Mountain Region,Tongren University,Tongren 554300,China;College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,China;Guizhou Cunhuaqiushi Eco-Agriculture Company,Tongren 554300,China)

机构地区：[1]铜仁学院农林工程与规划学院/贵州省梵净山地区生物多样性保护与利用重点实验室,贵州铜仁554300 [2]西北农林科技大学资源环境学院,陕西杨凌712100 [3]贵州村华秋实现代生态农业公司,贵州铜仁554300

出　　处：《食品与发酵工业》2020年第16期201-207,共7页Food and Fermentation Industries

基　　金：贵州省科技厅合作计划项目(黔科合LH字[2016]7301号);贵州省林学重点学科建设(黔学位办[2017]45号);贵州省梵净山地区生物多样性保护与利用重点实验室建设(黔科合平台人才[2020]2003)。

摘　　要：为开发刺梨绿色安全的保鲜技术,该试验以"贵农5号"为实验材料,研究短波紫外线(ultraviolet-C,UV-C)对刺梨保鲜效果的影响。试验采用剂量为1.2、2.4、4.8、6.0 kJ/m^2的UV-C对"贵农5号"进行照射,并贮藏在温度为(4±1)℃、相对湿度为80%-85%条件下,每隔7 d测定刺梨果实品质及酶活性的变化。结果表明,UV-C处理能够显著降低果实腐烂率及失重率,保持果实较高的硬度,降低细胞膜透性,保持较高的可溶性固形物、可滴定酸、VC含量,提高酚类物质含量,提高苯丙氨酸解氨酶和超氧化物歧化酶活性;其中,剂量为2.4、4.8 kJ/m^2的UV-C处理组效果最好,由此可知剂量为2.4 k-4.8 kJ/m^2的UV-C能够很好地保持刺梨的贮藏品质。In order to develop the green and safe preservation technology of Rosa roxburghii Tratt,the experiment used " Guinong 5" as the experimental material to study the effect of short-wave ultraviolet (UVC) on the preservation of Rosa roxburghii Tratt. In this experiment, " Guinong 5" was treated by different doses (1. 2,2. 4,4. 8,6. 0 kJ/m^2) of UV-C,and then were stored at (4 ±1) ℃ with a relative humidity of 80%-85%. Fruit quality and enzyme activity of Rosa roxburghii Tratt were measured every seven days.The results showed that UV-C treatment could significantly decrease the rate of decay and weight loss of Rosa roxburghii Tratt. It also could maintain higher fruit hardness,reduce cell membrane permeability and nutrient loss. Moreover,the sample treated with UV-C could significantly increase the contents of TSS,TA,VC,phenolic,enhance antioxidant capacity and increase the activities of phenylalanine ammonia-lyase and superoxide dismutase. Considering the above treatments,the UV-C groups treated with dosage of 2. 4 and 4. 8 kJ/m^2 could maintain the best quality of Rosa roxburghii Tratt.

关 键 词：刺梨 短波紫外线(UV-C)辐射 贮藏品质 防御酶活性 抗氧化能力 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]