title: Effect of 1-methylcyclopropene on chilling injury and quality of peach fruit during cold storage.
abstract: The effects of different concentrations (0, 0.1, 0.5, 1, and 5 μL/L) of 1-methylcyclopropene (1-MCP) on chilling injury (CI), fruit quality, and antioxidant enzyme activities in cold-stored peach fruit (Prunus persica Batsch cv Baifeng) were investigated. The results showed that treatment with 0.5 μL/L 1-MCP significantly alleviated CI symptoms, including internal browing (IB) and flesh mealiness (FM), and maintained higher fruit quality. In addition, 1-MCP inhibited the activities of polyphenol oxidase (PPO) and peroxidase (POD), maintained higher activities of antioxidant enzymes and kept the balance of the polygalacturonase (PG)/pectinmethylesterase (PME) ratio. The treatment of 1-MCP markedly inhibited the increase of electrolyte leakage and the accumulation of malondialdehyde and hydrogen peroxide. Thus, 1-MCP (0.5 μL/L) treatment is effective in preventing CI and maintaining overall quality in peach fruit. The effect of 1-MCP on alleviating CI may be due to its capability to enhance antioxidant enzyme activities and to reduce oxidative damage. Practical Application:  Treatment with 0.5 μL/L 1-MCP significantly prevented chilling injury and maintained fruit quality in "Baifeng" peaches. In addition, 1-MCP could enhance antioxidant enzyme activities and alleviate oxidative damage. Thus, 1-MCP has the potential for application in the Asiatic peach industry.
authors.affiliation: College of Food Sci. and Technol., Nanjing Agricultural Univ., Nanjing, 210095, P.R. China.
authors.forename: Peng
authors.initials: P
authors.lastname: Jin
authors.forename: Haitao
authors.initials: H
authors.lastname: Shang
authors.forename: Jingjing
authors.initials: J
authors.lastname: Chen
authors.forename: Hong
authors.initials: H
authors.lastname: Zhu
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yonghua
authors.initials: Y
authors.lastname: Zheng
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D002265:Carboxylic Ester Hydrolases / Q000378:metabolism; D004156:Catechol Oxidase / Q000037:antagonists & inhibitors / Q000378:metabolism; D003080:Cold Temperature; D003521:Cyclopropanes / Q000378:metabolism*; D061353:Food Storage / Q000379:methods*; D005638:Fruit / Q000201:enzymology; D006861:Hydrogen Peroxide / Q000378:metabolism; D008315:Malondialdehyde; D009195:Peroxidase / Q000037:antagonists & inhibitors / Q000378:metabolism; D027861:Prunus / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D003521:Cyclopropanes; D008315:Malondialdehyde; D006861:Hydrogen Peroxide; D004156:Catechol Oxidase; D009195:Peroxidase; D002265:Carboxylic Ester Hydrolases; C022323:pectinesterase; C412563:1-methylcyclopropene