ISHS Acta Horticulturae 194: International Symposium on Fruit & Vegetables for Processing
EFFECTS OF DIFFERENT CONDITIONS OF COLD STORAGE UPON PHYSICOCHEMICAL CHANGES OF KIWI FRUIT. |
| Authors: | J. NICOLAS, M. BURET, F. DUPRAT, M. NICOLAS, C. ROTHAN, P. MORAS |
| Abstract:
The effects of intermittent high CO2 (30 %) exposure or severe hypoxia, pre-dipping in CaCl2 solution on physicochemical characteritics of kiwifruit was studied and compared to those obtained under normal air controlled atmosphere (2 % O2 + 5 % CO2) ripening conditions with special emphasis on the initial 10 weeks period of storage. In the control treatment the fruit softened rapidly during the first 10 weeks and more slowly after this period. The rapid fruit softening was accompanied by an important increase of reducing sugars and refractive index values, the total acidity fluctuated with a decrease in citric acid and an increase in malic acid content. After 10 weeks, the reducing sugars remained constant whereas the refractive index, total acidity, citric and malic acids slowly decreased. In samples stored in controlled atmosphere, there were almost no change in skin firmness, deformation and malic acid content whereas changes in flesh firmness, compressibility, refractive index, reducing sugars, total acidity and citric acid content were delayed. Compare to these two extreme treatments, the effects of the other treatments during the initial period of storage are shown and discussed. | |
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