Abstract 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 20 °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 0.10 kPa 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’.

中文翻译：

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基于二氧化碳产生的动态可控气氛（DCA-CD）：长期储存后苹果的低氧限值建立、代谢和整体质量

摘要 本研究旨在通过 DCA-CD（基于 CO2 产生的动态受控气氛）估计几个苹果品种和季节的氧下限 (LOL)，并将该方法与 DCA-RQ 进行比较。DCA – CD 下储存的水果的新陈代谢和整体质量保持也与 CA – ULO、DCA – CF 和 DCA – RQ 的“帝国盛会”、“富士 Suprema”、“金冠”和“克里普斯粉红”苹果进行了比较9 个月的储存加上 20 °C 下 7 天的保质期。这些实验进行了三年多。DCA – CD 方法仅基于水果的 CO2 产量，正确估计了品种和季节的 LOL，允许根据贮藏期间水果代谢的 pO2 变化，相比之下，差异在 0.01 至 0.10 kPa O2 之间到 DCA – RQ。在 DCA – CD 下储存允许在安全水平下诱导厌氧代谢化合物，低于文献中报告的气味阈值，并且不会损坏细胞膜。DCA – CD 下的水果果肉分解率较低，果肉硬度较高，并降低了“帝王盛宴”和“金冠”中的腐烂率。