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Abstract


The Effects Of Variety On Storage Life And Fruit Quality Of Mature Green Tomatoes During Modified Atmosphere Packaging Storage
The aim of the study was to develop a modified atmosphere packaging system, using different packaging films, which would retard deterioration and extend the storage life and keeping quality of mature green tomatoes. An experimental retail packaging system was used to compare the atmospheric composition which developed within sealed packs with a range of plastic films with different permeability properties, and to study the effects of these conditions on the changes in postharvest qualities of mature green tomatoes. Tomato fruits in two different varieties harvested at mature green stage of maturity were stored on polystyrene trays either unwrapped or sealed in 30 and 50(x polyethylenes and in 25|i polypropylene, and each pack contained six tomatoes which were stored at 13°C and 78 % rh for 60 days. Tomatoes were evaluated for change of colour, firmness, titratable acidity, total soluble solids and decay during 60 days of storage. There was a significant difference in the rate of change in colour and firmness during storage, between unwrapped and wrapped, and between varieties. Seal packaging delayed the development of the red colour of tomatoes, especially for those sealed in PE50 and PP, until 60 days for Critérium and 35-40 days for Liberto variety. All tomatoes in the films were still firm after 60 days in storage. Unwrapped Liberto variety reached their reddest colour after 30 days whereasCritérium ones reached it after 10 days than Liberto. The lowest level of decay were with the Liberto variety in packages. The percentage of decayed fruit was higher with Critérium variety than Liberto variety.

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