Folia Horticulturae

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Quality of ‘Jonagold’ apples after storage under Ultra Low Oxygen controlled atmoshpere

Jan Skrzyński

Department of Pomology
Faculty of Horticulture, University of Agriculture in Kraków
29 Listopada 54, 31-425 Kraków, Poland

In the years 1998-2000 ‘Jonagold’ apples were harvested at optimum maturity for long-term storage. After cooling, samples were stored at 2°C in the controlled atmospheres of 1.9% O2 with various concentrations of carbon dioxide of 1.0%, 2.0% and 3.0%. Additionally one lot of samples was stored in the normal air. Quality characteristics were investigated over a period of 10, 18, 26 and 34 weeks of storage plus 1 week at 20°C of a simulated shelf-life marketing period. Fruit flesh firmness after storage for 34 weeks at all ULO conditions was up to 84% of initial values observed during harvest. The weekly rate of flesh firmness decline throughout the storage period was on average 0.04 kG. There were no incidences of physiological disorders related to low oxygen or high carbon dioxide concentrations. After storage in the controlled atmospheres for 34 weeks, acidity in the edible part of fruits was the highest after ULO with 3.0% CO2 and was kept at the level of up to 66% of initial value at harvest. Differences in sugars to acids ratio after the whole storage period were nonsignificant for all tested ULO conditions. Quality of ‘Jonagold’ fruit after storage in ULO conditions for 34 weeks was similar or higher than that of fruit stored in cold store in the air until mid December. It may be concluded that ‘Jonagold’ apples can be stored for 34 weeks (8 months) in Ultra Low Oxygen CA, preserving high quality and full acceptability for consumption.

Skrzyński J., 2001. Quality of ‘Jonagold’ apples after storage under Ultra Low Oxygen controlled atmosphere. Folia Horticulturae 13/2: 75-82.