Effects of low temperature combined with 1-MCP on postharvest quality of Tunisia soft-seed pomegranate
YAN Xinpeng1, ZHANG Runguang1*, LIANG Qiqi1, GUO Xiaocheng2, YAO Gang3, LI Yuying4, ZHANG Youlin1
1(College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an 710119, China) 2(Xi'an Agricultural Technology Extension Center, Xi'an 710061, China) 3(Henan Dr.Liu Agricultural and Forestry Development Co.Ltd., Nanyang 474425, China) 4(Henan Engineering Research Center of Soft Seed Pomegranate, Nanyang 473061, China)
Abstract: 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.
闫欣鹏,张润光,梁琪琪,等. 低温结合1-MCP处理对突尼斯软籽石榴采后品质的影响[J]. 食品与发酵工业, 2021, 47(5): 147-155.
YAN Xinpeng,ZHANG Runguang,LIANG Qiqi,et al. Effects of low temperature combined with 1-MCP on postharvest quality of Tunisia soft-seed pomegranate[J]. Food and Fermentation Industries, 2021, 47(5): 147-155.
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2021, Vol. 47 
