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KMID : 0903619980390050569
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Journal of the Korean Society for Horticultural Science
1998 Volume.39 No. 5 p.569 ~ p.573
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Effects of Harvest Maturity and Storage Environments on the Incidence of Watercore , Flesh Browning , and Quality in ´ Fuji ´ Apples
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Lim Yeoun-Su
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Abstract
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This study was conducted to find out potential storage factors associated with the incidence of flesh browning disorder in ´Fuji´ apples affected by watercore and to establish a CA storage condition because watercored ´Fuji´ apples often develop browning disorder under CA storage. Quality features including soluble solid contents and juice acidity were enhanced when apples were harvested late in the season. Even though the severity of watercore greatly increased in those fruit, flesh firmness was not significantly different between harvest dates. The watercore symptom gradually disappeared during storage and no physiological disorder such as flesh browning was found in fruit stored in air at 0℃. Flesh browning was induced within 2 months when CO₂ concentration was 2-3% regardless O₂ concentration (2-3%). Early harvested fruits which were less affected by watercore did not develop this disorder under the combination of O₂ 2% + CO₂ 2%. Fruit severely affected by watercore because of delayed harvest did not develop browning disorder when CO₂ was removed from storage atmosphere even under low O₂ (2%). Results indicated that high CO₂ concentration may be a major factor associated with the incidence of flesh browning in watercored ´Fuji´ apples during CA storage. Thus, CO₂ scrubbing or delay CA storage until watercore symptom is disappeared is recommended for the storage of ´Fuji´ apple affected by severe watercore at harvest.
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