Dynamic controlled atmosphere based on carbon dioxide production (DCA – CD): Lower oxygen limit establishment, metabolism and overall quality of apples after long-term storage
Fabio Rodrigo Thewes, Auri Brackmann, Vanderlei Both, Rogerio de Oliveira Anese, Erani Eliseu Schultz, Vagner Ludwig, Lucas Mallmann Wendt, Magno Roberto Pasquetti Berghetti and Flavio Roberto Thewes
Postharvest Biology and Technology, Volume 168, October 2020, 111285
2020
บทคัดย่อ
The present study aimed to estimate the lower oxygen limit (LOL) by DCA – CD (Dynamic controlled atmosphere based on CO2 production) for several apple cultivars and seasons and compare this method with DCA – RQ. The metabolism and overall quality maintenance of fruit stored under DCA – CD was also compared with CA – ULO, DCA – CF and DCA – RQ for ‘Imperial Gala’, ‘Fuji Suprema’, ‘Golden Delicious’ and ‘Cripps Pink’ apples after 9 months of storage plus 7 d of shelf life at 20โ€ฏ°C. The experiments were carried out over three years. The DCA – CD method, which is based only by CO2 production by the fruit, correctly estimated the LOL for cultivars and seasons, allowing the pO2 variation according to fruit metabolism during storage period, with a difference between 0.01 to 0.10โ€ฏkPa O2, when compared to DCA – RQ. Storage under DCA – CD allowed the induction of anaerobic metabolism compounds in safe levels, below the odor threshold reported in the literature, and without damaging the cell membranes. Fruit under DCA – CD had lower flesh breakdown incidence and higher flesh firmness and reduced the decay incidence in ‘Imperial Gala’ and ‘Golden Delicious’.