Effects of 1-Methylcyclopropene Treatment on the Quality and Malic Acid Metabolism of ‘Xiangjiao’ Plum under Low-Temperature Storage
Shutong Wu,
Zhiqiang Zhu,
Yunze Han,
Shujuan Ji,
Shunchang Cheng,
Qian Zhou,
Xin Zhou,
Meilin Li,
Baodong Wei
Affiliations
Shutong Wu
Post-Harvest Biology and Storage of Fruits and Vegetables Laboratory, Department of Food Science, College of Food, Shenyang Agricultural University, Shenyang 110866, China
Zhiqiang Zhu
Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Key Laboratory of Storage of Agricultural Products, Ministry of Agriculture and Rural Affairs, National Engineering Technology Research Center for Preservation of Agricultural Products, Tianjin 300384, China
Yunze Han
School of Medicine, He University, Shenyang 110125, China
Shujuan Ji
Post-Harvest Biology and Storage of Fruits and Vegetables Laboratory, Department of Food Science, College of Food, Shenyang Agricultural University, Shenyang 110866, China
Shunchang Cheng
Post-Harvest Biology and Storage of Fruits and Vegetables Laboratory, Department of Food Science, College of Food, Shenyang Agricultural University, Shenyang 110866, China
Qian Zhou
Post-Harvest Biology and Storage of Fruits and Vegetables Laboratory, Department of Food Science, College of Food, Shenyang Agricultural University, Shenyang 110866, China
Xin Zhou
Post-Harvest Biology and Storage of Fruits and Vegetables Laboratory, Department of Food Science, College of Food, Shenyang Agricultural University, Shenyang 110866, China
Meilin Li
Post-Harvest Biology and Storage of Fruits and Vegetables Laboratory, Department of Food Science, College of Food, Shenyang Agricultural University, Shenyang 110866, China
Baodong Wei
Post-Harvest Biology and Storage of Fruits and Vegetables Laboratory, Department of Food Science, College of Food, Shenyang Agricultural University, Shenyang 110866, China
‘Xiangjiao’ plum (Prunus salicina Lindl.) is a stone fruit that is vulnerable to the chilling injury (CI) that is caused by low-temperature stress. The effects of 1-methylcyclopropene (1-MCP) and ethylene absorbent (EA) treatments on the fruit quality and malic acid metabolism of ‘Xiangjiao’ plum stored at 4 °C were compared in this study. Compared with the control check (CK) and EA treatment, fumigation with 1.0 mg·L−1 of 1-MCP for 24 h could more significantly maintain the sensory and physiological quality of the fruit, increase the activity of antioxidant enzymes, and prolong the storage time of plums. Furthermore, 1-MCP treatment can regulate the high expression of the tonoplast dicarboxylate transporter (tDT) and phosphoenolpyruvate carboxylase (PEPC) gene, regulate the high expression of the NAD-malate dehydrogenase (NAD-MDH) gene at the end of storage, and inhibit the expression of the NADP-malic enzyme (NADP-ME) gene. These changes resulted in increased NAD-MDH enzyme activity and decreased NADP-ME enzyme activity, which inhibited the degradation of malic acid that is caused by CI. As a result, 1-MCP can effectively maintain the storage quality of ‘Xiangjiao’ plum, reduce the loss of pleasant sour taste, and improve the edible flavor and commercial value of the fruit.
