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KMID : 0903619940350060593
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Journal of the Korean Society for Horticultural Science
1994 Volume.35 No. 6 p.593 ~ p.598
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Effect of Fruit Maturity on the Quality of ´ Tsugaru ´ Apples During Cold Storage and Simulated Marketing
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Abstract
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Optimum maturity for harvesting mid-season apple cultivar ´Tsugaru´ was investigated in relation to changes in fruit physiology such as respiration, ethylene evolution and eating quality of the fruits during the period of cold storage and other post harvest handling.
Respiratory climacteric of the maturing apple fruits started about 16 weeks after full bloom (August 14), being similarly ethylene evolution. Apples harvested before the increase in ethylene evolution of 1 ρ₁/㎏/hr or when internal ethylene concentration reached to about 1 ρ₁/ℓ in 16∼17weeks after full bloom had proper fruit quality after cold storage and during marketing period.
Among quality factors, fruit firmness and acidity tended to decrease consistently during the period of storage and marketing in relation to fruit maturity at harvest. In contrast, changes in soluble solids increased as the late harvest date delayed but did not show a consistent tendency of increase or decrease during the cold storage and marketing. The optimum harvest date of ´Tsugaru´ apple for storage and marketing in maintaning fruit quality was coincident with that estimated by the evolution and concentration of ethylen, predicting as a maturity index
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KEYWORD
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