Food Science and Biotechnology

Korean Society of Food Science and Technology (한국식품과학회)
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Poststorage Physiology and Quality Changes of 'Fuji' Apples as Influenced by Harvest Maturity and Storage Procedures

Park, Youn-Moon;Youn, Seack-Won

  • Published : 19990200

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Abstract

The physiological metabolism of 'Fuji' apples was investigated after storage in relation to the quality changes during simulated marketing period at $18-20^{\circ}C$. 'Fuji' apples were harvested twice at different maturity and stored in air or controlled atmospheres (CA) immediately after harvest $(standard\;CA:\;1-2%\;CO_2+2-3%\;O_2)$, and after a 4 week delay in a cold room (delay CA) at $0^{\circ}C$. 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, air-stored 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 $11.9-18.7\;mg\;CO_2\;kg^{-1}\;hr^{-1}$ and $0.24-13.62\;{\mu}L\;C_2H_4\;kg^{-1}\;hr^{-1}$, respectively, than air-stored apples which showed $18.5-25.1\;mg\;CO_2\;kg^{-1}\;hr^{-1}$ and $16.1-55.8\;{\mu}L\;C_2H_4\;kg^{-1}\;hr^{-1}$, respectively. Fruit that had been stored in delay CA had intermediate metabolic rates. Changes in ethylene evolution rates were closely related to the content of 1-aminocyclopropane-1-carboxylic acid (ACC).

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References

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