Phenolic Profile of Leaves and Drupes of Ten Olive Varieties

Abstract

Leaves and drupes of the olive varieties "Koroneiki", "Lianolia Kerkyras", "Mastoidis", "Arbequina", "Adramytini", "Megaritiki", "Gaidourelia", "Kalamata", "Konservolia" and "Chalkidiki" were collected at different seasons during 2008 and 2009 and investigated by HPLC for their phenolic profile and the concentration of the phenolic compounds present. The phenolic compounds identified in 2008 new season leaves were, in declining concentration order, oleuropein, 7-O-glucoside of luteolin and rutin whereas for those collected in 2009 the main phenolic compounds were oleuropein, rutin, 4-O-glucoside of luteolin and 7-O-glucoside of apigenin. In September - December 2009 collected leaves, oleuropein presented the higher concentration followed by 7-O-glucoside of luteolin, 4-O-glucoside of luteolin and rutin. Regarding green and black drupes for both years, the main phenolic compounds were oleuropein, verbascoside and rutin. Verbascoside was only found in drupes whereas the 7-O-glucoside of apigenin only in leaves. Εach tissue, for both years, had a similar phenolic profile in all varieties.

Keywords

• HPLC
• Olea europaea ssp. sativa
• oleuropein
• phenolic compounds