Comparison of some chemical parameters of a naturally debittered olive (Olea europaea L.) type with regular olive varieties.
Some olives grown in Karaburun peninsula in the west part of Turkey and mostly coming from Erkence variety lose their bitterness while still on the tree and are called Hurma among locals. This olive type does not require further processing to remove the bitter compounds. In this study, sugar, organic acid and fatty acid profiles of Hurma, Erkence (not naturally debittered) and Gemlik (commonly consumed as table olive) olives were determined throughout 8weeks of maturation period for two consecutive harvest seasons, and the results were analysed by principal component analysis (PCA). PCA of sugar and organic acid data revealed a differentiation in terms of harvest year but not on variety. Hurma olive is separated from others due to its fatty acid profile, and it has higher linoleic acid content compared to others. This might be an indication of increased desaturase enzyme activity for Hurma olives during natural debittering phase.
Izmir Institute of Technology, Department of Food Engineering, Urla, Izmir, Turkey.
Ayse Burcu
AB
Aktas
Izmir Institute of Technology, Department of Food Engineering, Urla, Izmir, Turkey. Electronic address: banuozen@iyte.edu.tr.
Banu
B
Ozen
Izmir Institute of Technology, Department of Food Engineering, Urla, Izmir, Turkey.
Figen
F
Tokatli
Izmir Institute of Technology, Department of Food Engineering, Urla, Izmir, Turkey.
Ilknur
I
Sen
D005227:Fatty Acids / Q000737:chemistry*; D031658:Olea / Q000737:chemistry*; D025341:Principal Component Analysis
D005227:Fatty Acids
Composition; Fatty acid; Naturally debittered; Olive; Organic acid; Principal component analysis; Sugar