1-Methylcyproene (1-MCP) for extending postharvest quality of ‘Cuiguan’ pears (Pyrus pyrifolia Nak.)
Youhong Chang, Jing Lin and Zhimei Yan
Abstracts of 27th International Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
1-Methylcyproene (1-MCP) for extending postharvest quality of ‘Cuiguan’ pears (Pyrus pyrifolia Nak.)
‘Cuiguan’ pear is a new pear variety with high fruit quality bred in China, but its postharvest shelf-life is short (often only 7 days) at room temperature. The potential for commercial application of 1-MCP, an ethylene inhibitor, to maintain quality of ‘Cuiguan’ pears during storage at room temperature was investigated.Pear fruit were harvested at 80% ripe stage, treated with 1-MCP at 1 mL.L-1 for 15h at room temperature (25+2°C), and then stored at 20+2°C in unsealed plastic bags.Ethylene production, firmness, soluble solids concentration, titratable acidity, and malonyl dialdehyde (MDA) content were determined at 5-day intervals, and the development of black skin, a physiological disorder with a symptom similar to that of superficial scald was noted during storage.1-MCP not only delayed the ethylene climacteric peakby 10 days but reduced the ethylene production rate as well.The magnitude of the ethylene peak was 50% lower in fruit treated with 1-MCP than in control fruit.Fruit treated with 1-MCP were firmer throughout storage compared with control.Firmness was 4.75kg/cm-2 in fruit treated with 1-MCP on day 30 (last day of control),while only 4.02kg/cm-2 in control.Soluble solids concentration, titratable acidity and MDA content in fruit treated with 1-MCP were higher than in control fruit during storage.1-MCP was very effective in preventing the development of black skin.It did not occurred during storage in 1-MCP treated fruit, but it developed to 69% from day 15 to the end of storage, in control fruit.These results indicated that 1-MCP had a positive affect on maintaining postharvest shelf-life of ‘Cuiguan’ pear fruits.