| Abstract
| - Gala apples exposed to the ethylene action inhibitor 1-methylcyclopropene (1-MCP) for 12 h at 20°C were stored at 1 °C in air or a controlled atmosphere (CA) maintained at 1 kPa O2 and 2 kPaCO2. Volatile compounds were measured after 4, 12, 20, and 28 weeks plus 1 or 7 days at 20 °C.Treatment with 1-MCP and then storage in air or CA or storage in CA without 1-MCP treatmentreduced volatile production as compared to apples not treated with 1-MCP stored in air. The reducedproduction of esters, alcohols, aldehydes, acetic acid, and 1-methoxy-4-(2-propenyl)benzene wasobserved. Ester production by fruit stored in CA decreased throughout the storage period regardlessof previous 1-MCP treatment. The production of esters, alcohols, aldehydes, acetic acid, and1-methoxy-4-(2-propenyl)benzene by 1-MCP-treated fruit stored in air plus 7 days at 20 °C increasedafter 20 or 28 weeks of storage. Continuous exposure to 417 μmol m-3 ethylene for 7 days at 20 °Cafter 12 or 28 weeks of storage stimulated production of many volatile compounds, primarily estersand alcohols, by fruit stored in CA or 1-MCP-treated apples stored in air. However, exposure toethylene had no effect on the production of aldehydes or acetic acid. Keywords: 1-Methylcyclopropene; ethylene; firmness; esters; alcohols; aldehydes; 1-methoxy-4-(2-propenyl)benzene
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