Effect of 1-methylcyclopropene (1-MCP) treatment on quality and ethylene production of muskmelon fruit
Ju-Hyoung Cha, Byung-Ho Hwang, Eun-Ji Lee and Jongkee Kim
Abstracts of 27th International Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
Effect of 1-methylcyclopropene (1-MCP) treatment on quality and ethylene production of muskmelon fruit
Before the onset of climacteric in mature muskmelon fruit (cv. ‘Pearl’), grown in a plastic house, 1-methylcyclopropene(1-MCP), a gaseous inhibitor of ethylene, was applied and an evaluation of the subsequent molecular metabolic changes, including expression of genes involved in biosynthesis and perception of ethylene, were undertaken on fruit during storage at 25°C. Ripening-associated physiological changes in fruit treated with 1-MCP were very slow, compared to those in control fruit. only a slight increment in ethylene production, a significant delay of tissue softening and of yellow color development in fruit skin was manifested by 1-MCP treatment. However, little difference was observed in changes of total soluble solids content from the fruit either treated with the inhibitor or air. Application of 1-MCP to melon fruit reduced expression of CM-ACS1 and delayed normal expression of CM-ACO1 when compared to the controls. Expression of genes involved in ethylene reception, CM-ETR1 and CM-ERS1, remained unaffected during 15 days of storage after 1-MCP application. The data obtained in the present study support that 1-MCP applied to muskmelon fruit blocked ethylene binding to its receptor and thus inhibited action, consequently suppressing the autocatalytic regulation of expression of CM-ACS1. A relatively small peak in ethylene production in 1-MCP treatment fruit is probably due to reduced expression of CM-ACS1 rather than CM-ACO1, lending to inhibition of an autocatalytic production of ethylene, a prerequisite for climacteric fruit to undergo ripening.