• Antioxidant capacity;
  • colour;
  • ethylene;
  • firmness;
  • hydroxytyrosol;
  • oil;
  • oleuropein;
  • olives;
  • respiration;
  • verbascoside


Quality attributes were investigated in fresh Greek black table ‘Kalamon’ olives prior to processing. Fruit weight, dimensions, respiration and ethylene production rates, firmness, peel colour, moisture, oil content, total antioxidant capacity (TAC), the concentration of total phenolics (TP) and phenolic compounds (hydroxytyrosol, oleuropein, tyrosol, verbascoside, luteolin-7-O-glucoside, luteolin, rutin) were determined in olives from different orchards. There was a significant effect of orchard on most attributes, but not on fruit firmness. Verbascoside, oleuropein and hydroxytyrosol were the major phenolics, and the presence of verbascoside in ‘Kalamon’ olives is revealed for the first time. Positive correlations were found among fruit weight, dimensions, respiration and ethylene. TAC was positively related mainly to TP, hydroxytyrosol, verbascoside and rutin, but inversely to oleuropein. Luteolin was inversely related to luteolin-7-O-glucoside. Colour darkening was directly related to TAC, while colour parameters were positively and moderately affected by oil and moisture.