EVALUATION OF POLYPHENOLS CONTENT AND ANTIOXIDANT ACTIVITY OF LEAVES FROM EIGHT VARIETIES ORANGE TREES UNDER ENVIRONMENTAL CONDITIONS OF PELOPONNESE REGION, GREECE.

Leaves from eight varieties of orange trees (Navelina, Newhall, Merlin, Tarocco, Moro, Valencia, Lane late and Salustiana) from Argos of Peloponnese region, Greece, were analysed for phenolics content and antioxidant activity, using ethanol extracts. It was found that the content of total phenols (TP), varied from 9.104 to 18.35 mg GAE/g DW, Non-flavonoid phenols (NFP) from 2965.0 to 6768.5 pg GAE/g, Flavonoid phenols (FP) from 6139.2 to 13800.0 pg GAE/g DW, and F-3-ols from 1295.3 to 3069.6 pg(CE)/g DW, depending on the variety of orange trees. The leaves of Valencia orange trees exhibited the highest total antioxidant capacity (TAC), equal to 1520.0 pg Trolox/g DW, while the leaves of Moro orange trees exhibited the lowest, equal to 826.0 pg Trolox/g. The leaves from the orange trees under consideration are regarded as potent sources of biologically active phenolic compounds for pharmaceutical purposes. [ABSTRACT FROM AUTHOR]

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