Impact of 1-MCP on postharvest quality of sweet cherry during cold storage

Abstract

Sweet cherry (Prunus avium L.) is a kind of fruit with short postharvest life. Postharvest treatment of 1-methylcyclopropene (1-MCP: 1.0, 1.5 and 2.0 µL/L) was applied to cherry fruits, and its effects on postharvest fruit quality during 60-day-storage at cold temperature was investigated. Sweet cherry fruits were harvested at commercial fruit maturity and exposed to 1-MCP at 20±1°C for 24 h. Following 1-MCP treatments, the fruits were stored for 60 d at 90±5% RH and, 0±1°C, in three concentrations of 1.0, 1.5, and 2.0 µL/L 1-MCP, of which 1.5 µL/L 1-MCP had the most positive effect on fruit quality. Postharvest treatments of 1-MCP significantly reduced endogenous ethylene production, malondialdehyde (MDA) content, and polyphenol oxidase (PPO) activity in cherry fruits 60 d after cold storage when compared to untreated fruits. 1-MCP treatment was associated with lower respiration rate and relative electric conductivity (REC) and maintained cell membrane integrity. The results indicated that the treatment 1-MCP was effective in inhibition of the declining of POD activity and CAT activity. In conclusion, 1-MCP treatment could be a good candidate for maintaining postharvest quality of cherry, and 1-MCP could prolong the storage life of sweet cherry.

Key words： sweet cherry; 1-methylcyclopropene (1-MCP); postharvest quality; cold storage

References

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