MeJA regulates enzymes involved in ascorbic acid and glutathione metabolism and improves chilling tolerance in loquat fruit |
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| Authors: | Yuting Cai Shifeng Cao Zhenfeng Yang Yonghua Zheng |
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| Institution: | 1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, Jiangsu, PR China;2. Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Liuying 100, Nanjing 210014, PR China;1. School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China;2. Inspection and Testing Center of Changyi city, Weifang 261300, China;1. Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China;2. Food Science Program, Division of Food System & Bioengineering, University of Missouri, Columbia, MO 65211-5160, USA;3. Department of Food Science and Technology, University of Georgia, 1109 Experiment Street, Griffin, GA 30223, USA;1. Key Laboratory of Plant Resource Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;2. Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture, Guangzhou 510650, China;3. University of Chinese Academy of Sciences, Beijing 100039, China;4. College of Food Science and Technology, Hainan University, Haikou 570228, China;1. College of Food Science and Technology, Nanjing Agricultural University, Weigang 1, Nanjing 210095, PR China;2. Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Liuying 100, Nanjing 210014, PR China;3. College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China;4. School of Agriculture and Food Sciences, The University of Queensland, Gatton Qld 4343, Australia;1. Department of Food Science, Shenyang Agricultural University, Shenyang, 110866, PR China;2. Experimental Teaching Center, Shenyang Normal University, Shenyang, 110034, PR China;3. Shenyang Grain and Oil Food Science Institute, Shenyang, 110025, PR China |
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| Abstract: | This study investigated the regulation of ascorbate acid (AsA) and glutathione metabolism and chilling tolerance by methyl jamonate (MeJA) in loquat fruit. The results showed that application of MeJA to loquat fruit inhibited the incidence of chilling injury manifested as internal browning (IB) and increased AsA and reduced glutathione (GSH) contents due to the inhibition of ascorbate oxidase activity and enhancement of monodehydroascorbate reductase, dehydroascorbate reductase and glutathione reductase activities. Meanwhile, MeJA also enhanced activities of ascorbate peroxidase, glutathione peroxidase and glutathione-S-transferase. Our results suggested that MeJA can regulate the ascorbate and glutathione metabolism and has important roles in alleviating oxidative damage and enhancing chilling tolerance in loquat fruit. |
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