江苏农业学报2025，Vol.41Issue(4)：764-775,12.DOI:10.3969/j.issn.1000-4440.2025.04.015
不同干燥方法对核桃贮藏过程中内种皮褐变的影响
Effects of different drying methods on browning of walnut endotesta dur-ing storage
摘要
Abstract
To investigate the impact of drying methods on the browning of the endotesta during walnut storage and to provide a theoretical basis for the control of endotesta browning during walnut storage,this study used the walnut variety"Qingxiang"as the experimental material.Four drying methods were employed:natural sun-drying(CK),hot-air drying(T1),vacuum drying(T2),and variable-temper-ature vacuum drying(T3).During storage,changes in the appearance of the kernel and browning indices of the en-dotesta were measured.Path analysis was used to identify the main factors affecting endotesta browning in walnuts.The results indicated that with the extension of storage time,the color of the kernels in all treatments gradually darkened and the degree of browning increased.Compared with CK,the kernels in T2 and T3 treatments had lighter color and lower degree of browning.The relative electrical conductivity and the content of malondialdehyde(MDA)gradually increased with the extension of storage time.The increase was the highest in CK,while the increments in T2 and T3 treatments were relatively smaller.The total phenolic content in the wal-nut endotesta decreased at 30 days of storage,increased at 60 days,and then decreased again at 90 days.However,the magnitude of these increases and decreases was not significant.Throughout the storage period,the total phenolic content in the walnut endotesta remained at a relatively high level.Compared with CK,the total phenolic content in the endotesta of walnuts in T2 and T3 was generally higher.The activities of polyphenol oxidase(PPO),superoxide dismutase(SOD)and Na+/K+-ATPase in walnut endotesta increased first and then decreased.Compared with CK,the activities of SOD and Na+/K+-ATPase in walnut endotesta under T2 and T3 treatments were generally higher,and the activity of PPO was generally lower.The peroxidase(POD)activity of walnut endotesta showed a downward trend as a whole.Compared with CK,the POD activity of walnut endotesta in T2 and T3 treatments was generally higher.The activities of catalase(CAT)and lipoxy-genase(LOX)showed an upward trend.Compared with CK,the activity of CAT was higher and the activity of LOX was lower in T2 and T3 treatments.The path analysis results indicated that different drying methods had different effects on wal-nut browning during storage.For walnuts in the CK,the main factors influencing browning were the activities of PPO,POD,and Na+/K+-ATPase.For walnuts in T1 treatment,the main factors influencing browning were the total phenolic content,CAT activity,and Na+/K+-ATPase activity.For walnuts in T2 treatment,the main factors influencing browning were the activities of SOD,POD,and Na+/K+-ATPase.For walnuts in T3 treatment,the main factors influencing browning were the total phenolic content,POD activity,and Na+/K+-ATPase activity.关键词
核桃/内种皮/干燥方法/贮藏/褐变Key words
walnut/endotesta/drying methods/storage/browning分类
农业科技引用本文复制引用
王一峰,胡文斌,陈耀年,赵淑玲,王明霞..不同干燥方法对核桃贮藏过程中内种皮褐变的影响[J].江苏农业学报,2025,41(4):764-775,12.基金项目
甘肃省自然科学基金项目(22JR5RK1049) （22JR5RK1049）
甘肃省高校教师创新基金项目(2024B-333) （2024B-333）
甘肃省高等学校创新创业教育改革项目[甘教高函(2023)14号] （2023）
甘肃省大学生就业创业能力提升工程项目[甘教学函(2023)29号] （2023）
