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Rates of change in firmness acidity and ethylene production of cultivar mcintosh apples malus domestica in simulated low ethylene controlled atmosphere storage



Rates of change in firmness acidity and ethylene production of cultivar mcintosh apples malus domestica in simulated low ethylene controlled atmosphere storage



Journal of the American Society for Horticultural Science 111(3): 404-408



'McIntosh" apples (Malus domesticus Bork.) sprayed with 1000 or 2000 mg .cntdot. liter-1 daminozide were stored in simulated low-ethylene controlled atmosphere (CA) storage for 7.5 and 9.5 months in 3 consecutive years. The simulated CA was a flow-through system with 2.5-3% O2, 3-5% CO2, < 1 .mu.l .cntdot. liter-1 ethylene, 2.2.degree. to 3.3.degree. C, and 90-95% relative humidity. A maturity index based on the date of the onset of autocatalytic ethylene production (AEP) of apples not sprayed with daminozide was used. 'McIntosh' apples, which were harvested within 10 days after the onset of AEP, lost < 10% of their original firmness, 27-29% of acidity, and 0% of soluble solids after 7.5 months of storage. The rates of ethylene production of these apples were very low in the first 4 months, gradually increased thereafter, but remained < 0.5 .mu.l .cntdot. kg-1 .cntdot. hr-1 for at least 7 months. The low-ethylene CA effectively preserved the quality and inhibited the ethylene production of 'McIntosh' apples.

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Accession: 006262770

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