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KMID : 1007519990080010030
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Food Science and Biotechnology
1999 Volume.8 No. 1 p.30 ~ p.33
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Poststorage Physiology and Quality Changes of Fuji Apples as Influenced by Harvest Maturity and Storage Proeedures
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Park Youn-Moon
Youn Seack-Won
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Abstract
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The physiological metabolism of `Fuji´ apples was investigated after storage in relation to the quality changes during simulated marketing period at 18-20℃. `Fuji´ apples were harvested twice at different maturity and stored in air or controlled atmospheres (CA) immediately after harvest (standard CA: 1-2% CO₂+ 2-3 % O₂), and after a 4 week delay in a cold room (delay CA) at 0℃. After four-month storage, the physiological metabolism and quality changes were investigated on the shelves. During the simulated marketing period, CA-stored apples appeared to retain flesh firmness and juice acidity. In contrast, airstored apples showed lower acidity and decreases in firmness as the marketing period extended. Soluble solid content tended to decrease during the early marketing period and then increase in CA-stored apples, whereas it decreased continuously in air-stored apples. Fruit stored under standard CA showed relatively lower rates of respiration and ethylene evolution in the range of 11.9-18.7 ㎎ CO₂㎏^(-1) hr^(-1) and 0.24-13.62 μL C₂H₄㎏^(-1) hr^(-1), respectively, than air-stored apples which showed 18.5-25.1 ㎎ CO₂㎏^(-1) hr^(-1) and 16.1-55.8 μL C₂H₄㎏^(-1) hr^(-1), respectively. Fruit that had been stored in delay CA had intermediate metabolic rates. Changes in ethylene evolution rates were closely mated to the content of 1-aminocyclopropane-l-carboxylic acid (ACC).
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