Quality Assessment in Gemlik PDO Olives Based on Regional Differences, Oil, and Pigment Contents Within the SDG Goals

Year 2025, Volume: 9 Issue: 2, 400 - 413, 29.12.2025

Gülcan Özkan , Dilşat Bozdoğan Konuşkan , Serkan Gülsoy , Ufuk Çelikkol Akçay , Bekir Şan , Oğuz Dolgun

https://doi.org/10.32571/ijct.1825636

Abstract

This study examined how some physicochemical properties of Gemlik olives (Olea europaea L. cv. Gemlik) grown in five different regions of Türkiye (Antalya, Aydın, Balıkesir, Manisa, and Hatay) differed during two harvest seasons. The study was conducted to find out how changes in climate, soil composition, and leaf nutrients in the different regions affect fruit ripening, oil accumulation, and fruit pigmentation. Water, dry matter, oil, chlorophyll, and carotenoid contents analyses were performed on Gemlik olives. Balıkesir olives yielded the most oil (64.04% and 57.10% of dry weight), but Aydın and Manisa olives yielded less oil (16-17% of dry weight). Hatay had the most pigments (40.64 mg/kg chlorophyll and 235.63 mg/kg carotenoids). Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA) showed that oil and pigment changes are linked to environmental factors such as temperature, salt, and soil magnesium. This study ties in with the UN Sustainable Development Goals (SDGs 2, 12, and 13). It will also ensure quality and resilience to climate change within Protected Designation of Origin (PDO) systems.

Keywords

Gemlik olive , oil content , pigments (chlorophyll and carotenoids) , climate , soil interact , sustainable growth

Ethical Statement

no

Supporting Institution

TÜBİTAK

Project Number

TOVAG-109O099

Thanks

This research was funded by the Scientific and Technological Research Council of Türkiye (TÜBİTAK) under Project TOVAG-109O099, called “Comparison of Fruit, Oil, and Molecular Characteristics of Gemlik Olives Grown in the Marmara, Aegean, Western, and Eastern Mediterranean Regions.”

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