Dynamics of ascorbic acid in 'Braeburn' and 'Gala' apples during on-tree development and storage in atmospheres conducive to internal browning development

► 'Braeburn' apple cortex tissue has significantly higher ascorbic acid compared to 'Gala' apple cortex tissue. ► No correlation exists between 'Braeburn' or 'Gala' apple fruit maturity and ascorbic acid quantity. ► AgNO3 localization of ascorbic acid was consistent with analytical data. ► AsA content is not correlated with CO2 injury in 'Braeburn' apples.