Effects of controlled atmosphere on browning, redox metabolism and kernel quality of fresh in-hull walnut (Juglans regia L.)
文献类型： 外文期刊
作者： Ye, Niu 1 ; Zhang, Pingping 2 ; Wang, Yifan 1 ; Ma, Huiling 1 ; Zhang, Ting 3 ;
作者机构： 1.Northwest A&F Univ, Coll Life Sci, Yangling 712100, Shaanxi, Peoples R China
2.Govt XinJiang Uygur Autonomous Reg, XinJiang Uygur Autonomous Reg Dev & Reform Commis, Urumqi 830091, Xinjiang Uygur, Peoples R China
3.Xinjiang Acad Agr Sci, Inst Farm Prod Storage & Proc, Urumqi 830091, Xinjiang Uygur, Peoples R China
关键词： Antioxidant metabolism; Browning; CA storage; Fresh in-hull walnut; Kernel quality
期刊名称：HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY （ 影响因子：1.842； 五年影响因子：2.083 ）
ISSN： 2211-3452
年卷期： 2021 年 62 卷 3 期
页码：
收录情况： SCI
摘要： The green hull of fresh walnuts (Juglans regia L.) is highly susceptible to browning and accompanied with deterioration of the walnut quality, and the currently available preservation technologies still do not meet the market threshold supply of fresh walnut. This study investigated the effect of controlled atmosphere (CA) storage alone and combination with 1-Methylcyclopropene (1-MCP) on hull browning and kernel quality of fresh in-hull walnut. Fresh in-hull walnuts were treated with air (Control), CA (5% O-2, 7.5% CO2), 1-MCP (0.5 mu L L-1) + CA and stored at 0 +/- 0.5 degrees C for 100 d. Browning incidence, hull redox metabolism, kernel color and walnut oil quality were analyzed. The results showed that CA promoted the activities of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX), maintained total phenol (TP), gamma-aminobutyric acid (GABA), ascorbic acid (ASA), and glutathione (GSH) contents, inhibited ethylene production, reduced reactive oxygen species (ROS) accumulation, and delayed the hull browning. Besides, CA attained the highest kernel quality through inhibited the decrease of kernel color value and moisture content, and reduced acid value (AV) and peroxide value (POV) of walnut oil. While 1-MCP + CA treatment increased the activities of antioxidant enzymes, the combination weakened the other positive effects of CA. However, hull browning and kernel deterioration in 1-MCP + CA were less than that observed in air control. Overall, CA was an effective method for the preservation of fresh in-hull walnut at 0 +/- 0.5 degrees C.
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