Abstract
Breaker stage tomatoes ( Lycopersicon esculentum Mill., cultivar ‘Bermuda’) were treated in air, 0.5% or 1.0% oxygen (O 2) in nitrogen (N 2) or 80% carbon dioxide (CO 2) in air for 1, 3, 5 or 7 days at 22 °C. A 1 day low O 2 treatment delayed ripening after treatment by 1–2 days compared to a ripening period of 4 days for the control; elevated CO 2 for 1 day had no effect on ripening after treatment. Low O 2 increased production of ethanol and acetaldehyde compared to the control and high CO 2. Fruit treated for 3 or more days in low O 2 or high CO 2 showed skin injury and blotchy ripening. Disease incidence increased with treatment time, but could be controlled in 1 day treatments by reducing relative humidity to about 70%. Firmness, total soluble solids, titratable acidity and pH of pericarp and gel of 1 day treated fruit were not different from the control.
Published Version
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