5.

Evaluation of the Chemical Composition and Antioxidant Activity of the Essential Oils of Peucedanum longifolium (Waldst. & Kit.) and P. palimbioides (Boiss.)

Bektas Tepe, H. Askin Akpulat and Munevver Sokmen

Department of Molecular Biology and Genetics, Faculty of Science, Cumhuriyet University, TR 58140, Sivas, Türkiye

Department of the Secondary Education of Science and Mathematics, Faculty of Education, Cumhuriyet University, TR 58140, Sivas, Türkiye

Department of Chemistry, Faculty of Science and Literature, Karadeniz Technical University, TR 61080, Trabzon, Türkiye

Abstract: This study was designed to evaluate the chemical composition and antioxidant activity of the essential oils of Peucedanum longifolium and P. palimbioides. According to the GC-MS analysis, 35 compounds were accounted for 96.98% of the total oil of P. longifolia. Major components of the oil were 8-cedren-13-ol (33.74%), myristicin (8.03%), germacrene-D (7.73%) and D -3-carene (6.38%). In the case of P. palimbioides, 26 compounds were identified comprising the 98.96% of the total oil. The major compounds were described as a -pinene (35.45%), (E)-9-octadecenoic acid (23.57%) and b -pinene (20.19%). In general, P. palimbioides oil exhibited stronger than that of P. longifolia in all test systems. Especially in b -carotene/linoleic acid system, P. palimbioides showed strong activity against linoleic acid oxidation at 2.0 mg/mL concentration (90.58% ± 1.56). This value is too close to the synthetic antioxidants BHT and BHA at the same concentration (95.86% ± 0.23 and 93.05% ± 1.04, respectively). This plant also exhibited excellent chelating effect (90.39% ± 0.28) which is obviously greater than that of P. longifolium at 2.0 mg/mL concentration (24.12% ± 2.50). Chelating effect of the control agent EDTA was measured as 98.78% ± 0.78 (2.0 mg/mL).

Keywords: Peucedanum longifolium; Peucedanum palimbioides; antioxidant activity; essential oil; chemical composition.