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Harvest maturity related changes in the cold-induced activation of 1-aminocyclopropane-1-carboxylic acid metabolism in Granny Smith apples / Efecto del estado de madurez sobre la activación por frío del metabolismo del ácido 1-aminociclopropano-1-carboxílico en manzanas Granny Smith

Area de Post-collita, CeRTA, Centro UdL-IRTA, Rovira Roure, 177, 25198 Lleida, Spain

I. Recasens

Area de Post-collita, CeRTA, Centro UdL-IRTA, Rovira Roure, 177, 25198 Lleida, Spain

J. Graell

Area de Post-collita, CeRTA, Centro UdL-IRTA, Rovira Roure, 177, 25198 Lleida, Spain

M. Vendrell

Centro de Investigación y Desarrollo, CSIC, Jorge Girona, 18-26, 08034 Barcelona, Spain

Changes in 1-aminocyclopropane-1-carboxylic acid metabolism in apples (Malus domestica Borkh cv Granny Smith) were studied in relation to cold storage. Emphasis was given to the differential re sponsiveness of fruits to cold treatment as a function of stage of maturity at harvest. Fruits were held at 1 or 20 °C for 30 days, respectively, or exposed to 1 °C for 10 days and then storaged at 20 °C for up to 30 days. Fruits at 20 °C showed typical climacteric behavior. Differences at 1 °C between maturity stages in ethylene production and ACC oxidase activity were abolished, which showed that cold treatment is an important inducer of climacteric rise in preclimacteric Granny Smith apples. At 1 °C, ethylene production was lower than at 20 °C and the maxima in production were similar for all the stages of maturity, but took place at different times which corresponded exactly to the initial differ ences in harvest dates. After the transfer to 20 °C, fruits exhibited similar behavior as regards ethyl ene production, ACC oxidase activity, and ACC and MACC levels in relation to a harmonization process which is discussed in this study.

Key Words: apples • Malus domestica • Granny Smith • ethylene • post-harvest • cold storage

Food Science and Technology International, Vol. 5, No. 3, 223-228 (1999)
DOI: 10.1177/108201329900500304


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