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KMID : 0903619970380050516
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Journal of the Korean Society for Horticultural Science
1997 Volume.38 No. 5 p.516 ~ p.519
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Postharvest Physiology and Storage Disorders Affected by Temperature and PE Film Thickness in ´ Fuyu ´ Persimmon Fruit
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Abstract
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The effect of storage temperature and LDPE film thickness on fruit quality and physiological disorders such as peel discoloration and flesh breakdown were examined in ´Fuyu´ persimmon. Hunter L and a values changed greatly during storage, but no significant differences were observed among packaging treatments. Oxygen concentration inside 0.1㎜ PE bags decreased to 2-3% until 20 days of storage then increased to 8% during the rest period of storage. In contrast, oxygen concentrations maintained at the level of 4-5% throughout storage when 0.05㎜ film was used. Packaging with thicker film resulted in the accumulation of higher CO₂ inside film bags, which might be due to lower gas permeability of the films used. Changes in ethylene resembled the pattern of O₂ concentrations. Highest concentration was observed in 0.02㎜ film bags, whereas lowest in 0.05㎜ bags. Thicker film bags from 0.02㎜, 0.05㎜ to 0.1㎜ retarded weight loss more effectively by the inhibition of transpiration. Firmness was most effectively maintained in the 0.05㎜ film packages, which might result from the beneficial combination of CO₂ and O2. Fruit peel discolored faster with higher storage temperatures showing comparatively less disorder symptoms in both films of 0.05㎜ and 0.1㎜. The results suggested that the 0.05㎜ LDPE thickness resulted in the best retention of quality.
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