ISHS Acta Horticulturae 734: VIII International Symposium on Plum and Prune Genetics, Breeding and Pomology
QUALITY CHANGE OF PLUMS AS A FUNCTION OF RIPENING AND CULTIVARS |
| Authors: | E. Kovács, T. Kállay |
| Keywords: | color, -galactosidase, polygalacturonase, texture |
| Abstract:
Four plum cultivars: ‘Bluefre’, ‘President’, ‘Stanley’, ‘Tuleu gras’, were harvested at six different times in the orchard of the Research Institute for Fruitgrowing and Ornamentals in Budapest. The ripeness stage was characterized by measuring the color on the fruit surface. The color was measured by Hunterlab Colorflex sprectrocolorimeter (45°/0°), data were evaluated by a Hunterlab Universal Softver (Hunterlab, USA). The firmness, dry matter content (%), the pH and TSS (%) were also determined. The lightness values of skin of plums did not change as a function of harvest and cultivars (except ‘President’). The a* values significantly (P≥95%) increased as a function of ripeness, maximum values are depending on cultivars. The total soluble solids (TSS, %) increased (‘Bluefre’, ‘President’, ‘Stanley’) or did not change (‘Tuleu gras’), pH values increased as a function of harvest time. The dry matter content (%) increased and fruits became soft during ripening, especially ‘Tuleu gras’. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
