Abstract
Long-life ‘Calibra’ tomatoes (Lycopersicum esculentum Mill.) were minimally fresh processed in slices or wedges and packaged in polypropylene (PP) trays. Passive and active (3 kPa O2+0 kPa CO2 and 3 kPa O2+4 kPa CO2) modified atmosphere packages (MAP) were used at 0 and 5 °C. After 14 days, the gas composition within passive MAP packages was 11–13 kPa O2+5.5–6 kPa CO2 and 8–9.5 kPa O2+10.5–11.5 kPa CO2 at 0 and 5 °C, respectively. The gas composition reached in active MAP at both temperatures for both types of cuts was around 7–10.5 kPa O2 and 7–9 kPa CO2. The highest C2H4 level (15 μL L−1) was found in passive MAP at 5 °C, while in active MAP at both temperatures about 6 μL L−1 C2H4 accumulated. After 7 days of storage at 0 °C, the tomato pieces showed better aroma, appearance and overall quality than those stored at 5 °C. No difference between MAP treatments was found, although both led to a better appearance and overall quality than controls in air. After 14 days at 0 °C, only MAP treatments kept a good flavour, overall quality and texture, with no differences between them. After 14 days at 5 °C in all treatments, the flavour fell below a fair condition and the slices showed a slight senescence. MAP significantly reduced total plate counts (TPC) of slices at 5 °C, although only active MAP reduced TPC in wedges after 14 days at 5 °C. A visibly better appearance and overall quality was found in slices than in wedges. The main factors influencing the quality of tomato pieces were the storage duration and temperature. To keep the quality of fresh-cut tomatoes, one should consider three factors for selection: a suitable low chilling sensitive tomato cultivar, an adherent placenta and optimal maturity stage at harvest.
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The authors are grateful to CEBAS-CSIC and to Durán SAT for providing facilities and tomatoes respectively.
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Aguayo, E., Escalona, V. & Artés, F. Quality of fresh-cut tomato as affected by type of cut, packaging, temperature and storage time. Eur Food Res Technol 219, 492–499 (2004). https://doi.org/10.1007/s00217-004-0989-z
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DOI: https://doi.org/10.1007/s00217-004-0989-z