Effect of 1-MCP on Persimmon Fruit Quality and Expression of Ethylene Response Genes During Ripening

초록

This study was conducted to investigate the effects of 1-MCP on the quality and ethylene response gene expression in astringent persimmon 'Bansi' during ripening. Ethylene production was reduced from 0.59 mu L.kg(-1).hr(-1) immediately after harvest to 0.14 mu L.kg(-1).hr(-1) and 0.04 mu L.kg(-1).hr(-1) within five days in the control and 1-MCP treated fruit, respectively. Firmness was 13.8N immediately after harvest and declined rapidly to 7.4N within 1 day for control fruit, on the other hand 1-MCP fruit softened slightly to 11.1N up to the 7 day. Treatment with 1-MCP did not influence soluble solids concentrations. Soluble tannin declined significantly from 399.5 mg . 100g(-1) to 248.5 mg.100g(-1) in control fruit but tannin level for 1-MCP treated fruit was 357.8 mg.100g(-1) one day after harvest and did not change significantly through the ripening period. Expression of all the ethylene response genes during ripening was lower in 1-MCP treated fruit than in the control fruit. These results indicate that the inhibition of expression of ethylene receptor genes by 1-MCP treatment resulted in extended shelf life of astringent persimmons. The ethylene response genes mainly associated with this 1-MCP effect appear to be DKERF1, DKERF3, and DKERF8.

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