低温结合1-MCP处理对突尼斯软籽石榴采后品质的影响  

Effects of low temperature combined with 1-MCP on postharvest quality of Tunisia soft-seed pomegranate

作　　者：闫欣鹏 张润光[1] 梁琪琪 郭晓成[2] 姚岗 李玉英 张有林[1] YAN Xinpeng;ZHANG Runguang;LIANG Qiqi;GUO Xiaocheng;YAO Gang;LI Yuying;ZHANG Youlin(College of Food Engineering and Nutrition Science,Shaanxi Normal University,Xi’an 710119,China;Xi’an Agricultural Technology Extension Center,Xi’an 710061,China;Henan Dr.Liu Agricultural and Forestry Development Co.Ltd.,Nanyang 474425,China;Henan Engineering Research Center of Soft Seed Pomegranate,Nanyang 473061,China)

机构地区：[1]陕西师范大学食品工程与营养科学学院,陕西西安710119 [2]西安市农业技术推广中心,陕西西安710061 [3]河南榴博士农林开发有限公司,河南南阳474425 [4]河南省软籽石榴工程研究中心,河南南阳473061

出　　处：《食品与发酵工业》2021年第5期147-155,共9页Food and Fermentation Industries

基　　金：2020年度河南省县(市)创新引导计划项目(23);西安市农业科技创新工程项目(201806114YF02 NC10(6));榆林市科学技术研究与开发补助资金项目(2018-2-37)。

摘　　要：突尼斯软籽石榴在贮藏过程中容易出现果皮褐变、籽粒变质、软化腐烂等问题,严重影响果实的商品价值。以陕西潼关突尼斯软籽石榴为试材,研究低温结合1-甲基环丙烯(1-methyl-cyclopropene,1-MCP)处理对采后突尼斯软籽石榴品质的影响,即在贮藏温度(3±0.5)℃、相对湿度90%~95%条件下,选用0.2、0.5、1.0、1.5 mg/L四种不同质量浓度的1-MCP处理软籽石榴,贮藏期间每20 d测定石榴果实的可滴定酸、可溶性固形物、还原糖含量,呼吸强度、相对电导率、褐变指数及多酚氧化酶、过氧化物酶活性,并计算果实失重率和腐烂率,贮藏120 d时对软籽石榴的感官性状进行综合评价。结果表明,采用1.0 mg/L的1-MCP处理软籽石榴能有效减缓果实腐烂变质,减缓果实呼吸强度,降低褐变指数,较好地保持籽粒可溶性固形物、可滴定酸及还原糖含量,并使多酚氧化酶、过氧化物酶活性处于较低水平,降低果实失重率和腐烂率,保持良好的感官品质。突尼斯软籽石榴适宜的贮藏条件为:贮藏温度(3±0.5)℃、相对湿度90%~95%、1-MCP处理质量浓度1.0 mg/L,并用聚乙烯塑料袋密封包装,保鲜效果理想。Tunisia soft-seed pomegranate is prone to browning,grain metamorphism,softening and rotting during storage,which could seriously affect the commercial value of fruit.In this study,its quality indexes were determined in order to study the effects of low temperature(3±0.5)℃combined with different concentration(0.2,0.5,1 mg/L,1.5 mg/L)of 1-methyl-cyclopropene(1-MCP)treatment on postharvest quality Tunisia soft-seed pomegranate from Tong guan,Shaanxi at a relative humidity of 90%-95%.During the storage period,titratable acid,soluble solid,reducing sugar content,respiratory intensity,relative conductivity,browning index,polyphenol oxidase(POD)and peroxidase(PPO)activity of pomegranate fruit were measured every 20 days,and weight loss and rotting rate of pomegranate fruit were calculated.After 120 days of storage,the sensory properties of Tunisia soft-seed pomegranate were evaluated comprehensively.The results showed that 1.0 mg/L 1-MCP treatment could effectively slow down the rate of deterioration,reduce the respiration intensity and browning index.In addition,it could keep high content of soluble solids,titratable acid and reduce sugar content of the grain,maintain a lower level of the PPO and POD activity.Meanwhile,the weight loss and decay rate were low,the comprehensive quality of the fruit was good.So the optimized conditions for the storage of Tunisia soft-seed pomegranate were as follows:the storage temperature was(3±0.5)℃with the humidity of 90%-95%by using 1.0 mg/L 1-MCP treatment and seal with polyethylene(PE)plastic film for packaging storage.

关 键 词：软籽石榴 贮藏温度 1-甲基环丙烯 采后品质 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]