Red Fuji apple (Malus domestica Borkh var. Red Fuji) fruits were used to study the effect of 1-MCP on ethylene biosynthesis metabolism during storage. The results showed that 1-MCP maintained the firmness and inhibited the respiration rate, LOX activity and ethylene production rate of fruits. Further study indicated that 1-MCP inhibited ACS (ACC synthase) activity from the 15th day, increased ACC accumulation,and delayed the appearance of ACO (ACC oxidase) activity peak. The increase of protein kinase activity was also inhibited by 1-MCP during fruit ethylene climacteric time.
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