摘要
以白灵菇(Pleurotus nebrodensis)为试材,采用综合分析及主成分分析,研究了保鲜膜、PE自封袋、包装纸3种不同包装材料对低温贮藏白灵菇品质变化的影响,以期为白灵菇贮藏方式的选择提供参考依据。结果表明:保鲜膜可有效降低失重,维持硬度,减少糖类消耗,保持较高的超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性,延缓丙二醛(MDA)含量和细胞膜透性上升。包装纸处理的子实体褐变严重,组织软化,营养物质消耗严重,多酚氧化酶(PPO)活性显著高于另外2组。主成分分析提取出2个主成分,累积贡献率达到87.90%,可以解释原始数据的大部分信息。其中与第1主成分(PC1)相关性较高的指标有MDA、PPO、SOD等;而总糖、失重率与第2主成分(PC2)相关性较高。PCA结果表明,失重率、抗氧化酶活性、电导率等是影响白灵菇贮藏品质的关键指标。贮藏期间,保鲜膜处理氧化程度更低,能保持较高的抗氧化酶活性;包装纸处理较另外2组有明显的失重率上升。贮藏结束时保鲜膜处理综合评价得分最高。因此,保鲜膜能有效减少白灵菇水分流失和糖类物质消耗,延缓氧化和衰老。
Taking Pleurotus nebrodensis as the test material,the effects of three different packaging materials on the quality changes of Pleurotus nebrodensis in low temperature storage were studied by comprehensive analysis and principal component analysis,in order to provide reference for the selection of storage methods.The results showed that the plastic wrap could effectively reduce weight loss,maintain hardness,reduce carbohydrate consumption,maintain high SOD and CAT activities,and delay the increase of MDA and membrane permeability.The fruiting body of wrapping paper treatment group was seriously browned,tissue softening and nutrient consumption were serious,and PPO activity was significantly higher than those of the other two groups.Principal component analysis extracted two principal components,and the cumulative contribution rate reached 87.90%,which could explain most of the information of the original data.MDA,PPO and SOD were highly correlated with the first principal component(PC1).The indexes with high correlation with the second principal component(PC2) were total sugar and weight loss rate.The results of PCA showed that weight loss rate,antioxidant enzyme activity and electrical conductivity were the key indicators that affected the storage quality of Pleurotus nebrodensis.The oxidation degree of plastic wrap treatment group was lower which could maintain high antioxidant enzyme activity.The weight loss rate of the wrapping paper treatment group increased significantly compared with the other two groups.The group treated with plastic wrap got the highest score at the end of storage.Therefore,plastic wrap could effectively reduce water loss and carbohydrate consumption,and delayed oxidation and senescence of Pleurotus nebrodensis.
作者
常昊
赖亮民
钟武杰
王杰
CHANG Hao;LAI Liangmin;ZHONG Wujie;WANG Jie(College of Food Science,South China Agricultural University,Guangzhou,Guangdong 510642)
出处
《北方园艺》
CAS
北大核心
2023年第18期87-94,共8页
Northern Horticulture
基金
广东省重点领域研发计划资助项目(2018B020206001)
广东省乡村振兴战略专项资金资助项目(20210722)。
关键词
白灵菇
包装材料
低温贮藏
主成分分析
Pleurotus nebrodensis
packaging materials
low temperature storage
principal component analysis
