Variação da temperatura, oxigênio e CO 2 durante o armazenamento em atmosfera controlada de maçãs 'Royal Gala' Changes in temperature, oxygen and CO 2 during controlled atmosphere storage of 'Royal Gala' apples

The aim of this research was to evaluate the effect of changes of temperature, levels of O 2 and CO 2 during storage, on the quality of ‘Royal Gala’ apples stored in controlled atmosphere (CA) for long term. The treatments consisted of storage temperatures of 0.0 oC, 0.5 °C and 1.0 oC, decreasing in temperature during storage of 0.5 oC to 0.0 oC, in CA with 1.0 kPa O 2 and 2.0 kPa CO 2 , besides storage in low O 2 (0.8 kPa), decreasing in O 2 concentration (from 1.0 kPa to 0.8 kPa) and CO 2 increasing (from 2.0 kPa to 8.0 kPa) during storage period, at 0.5 oC. Fruit quality was evaluated after eight months of storage plus seven days at 20 °C. Apples stored at 1.0 oC, in standard CA (1.0 kPa O 2 and 2.0 kPa CO 2 ), showed less ethylene production, respiration, ACC oxidase activity and lower breakdown and mealy pulp incidence. Increasing in CO 2 concentration at the end of the storage period was not more efficient than standard CA in maintenance fruit quality during shelf life, but did not cause damage in the fruits. The decrease in O 2 and/or temperature during storage reduces the fruit decay incidence.

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