Antioxidative properties of olive fruits (olea europaea l.) from 'Gemlik' variety and relationship with soil properties and mineral composition

Abstract

The southeastern Marmara region of Turkey is one of the most important agricultural areas of the black table olive production. This study was conducted to evaluate the effect of soil properties on some fatty acids, phenolic compounds, total phenols and antioxidant capacity in the fruit of table olive cultivar 'Gemlik' from the southeastern Marmara region of Turkey. Soil and plant samples were collected from 64 olive groves. Some meaningful relationships between fatty acids and particle size of soil were determined. Some fatty acids, phenolic compounds and total phenols produced correlation coefficients with K, Ca, Mg and B contents of soils. Palmitoleic, linolenic and linoleinic acids produced significantly meaningful correlations with Mn contents of leaves. By the way the relationship with palmitolenic acid and Zn, Cu contents of soil was determined. The most significant correlation coefficients were determined between leaf nutrient element contents and fatty acids, total phenols. In contrast, relations did not exist between phenolic composition and leaf nutrient contents. K, Mg, Zn, Cu, Mn and Co in fruit correlated with some fatty acids. Magnesium produced negative and significant relations with oleuropein and hydroxytyrosol, except with remaining phenols.