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Several strawberry fruit cultivars were exposed to air or CO 2  at 2 °C for up to 9 days. Concentrations of fermentation products and organic acids, and activities of pyruvate decarboxylase (PDC) and alcohol dehydrogenase (ADH), were measured. Acetaldehyde, ethanol, and ethyl acetate concentrations accumulated in CO 2 -treated fruit of `Honeoye' and `Kent', but not in `Cavendish' or `Annapolis'. We classified the former group of cultivars as intolerant to high CO 2  and the latter group as tolerant to high CO 2 . Activities of PDC and ADH were higher in CO 2 -treated than air-treated fruit of the tolerant cultivars but not in the intolerant cultivars. Succinate accumulated in fruit of all cultivars, but concentrations were highest in the tolerant than in the intolerant cultivars. These results will be discussed in relation to mechanisms of CO 2  action on fruit metabolism.

533 Metabolic Changes Associated with Strawberry Cultivars with Different Tolerances to High Carbon Dioxide during Storage