The present study aimed at assessing the influence of ecological factors on volatile oil content and antiradical potential of Prangos ferulacea. The essential oil (EO) content and composition of different plant parts were also compared. Among 22 identified compounds by gas chromatography (GC) flame ionization detector and GC-mass spectrometry, monoterpene hydrocarbons as the major constituents contributed to 27.6% to 83.4% of the oil deriving from plants growing on the northern steeps of "Gandomkar" region at 2600 m (G.N-2600) and "Male-Amiri" at 2300 m height (MA.N-2300), respectively. Immature seed and leaf samples of "Male-Amiri" with 3.0% ± 0.16% and 0.79% ± 0.03% of EO content represented the samples with the highest and lowest EO yields, respectively. Whereas the EO of the leaves mostly contained δ-3-carene and α-bisabolol, other parts were rich in αand β-pinene. Extracts of accessions "G.N-2600" (EC 50 = 13.11 ± 0.69 μg/mL) and "M.S-2500" (10.55 ± 0.41 mmol TE/g) exhibited the most potent antiradical activities in the 1,1-diphenyl-2-picrylhydrazyl (DPPH) and Oxygen Radical Absorbance Capacity (ORAC) assays, respectively. Because of the extensive use of this species in traditional foods and the remarkable bioactivities of αand β-pinene and δ-3-carene, the EO of the plant can be considered as a valuable raw material in phytopharmaceutical and food industries.
The present study was designed to assess the influence of geographical factors on essential oil (EO) composition, along with antiradical potential and phytochemical contents of Ferulago angulata (Schltdl.) Boiss (Apiaceae) extracts for the first time. The aerial parts were hydrodistilled by Clevenger apparatus and subjected to gas chromatography coupled with flame ionization detector (GC/FID) and mass spectroscopy (GC/MS). The EO yields were significantly different from populations ‘Mongar’ (south‐slope, 3000 m) with 1.34±0.06 % and ‘Male‐Amiri’ (north slope, 2600 m) with 0.18±0.05 % of total oil. Thirty‐nine compounds were identified from the EOs of nine populations. α‐Pinene was the predominant component ranging from 20.84 to 49.06 % in ‘Gandomkar’ (north‐slope, 2500 m) and ‘Mongar’ (3000 m), respectively. The methanolic extract of ‘Mongar’ (north‐slope at 2500 m) possessed the highest total phenolic contents. Also, this population logically exhibited potent antiradical activity using both 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) and oxygen radical absorbance capacity (ORAC) assays with EC50 of 42.07±4.12 μg/mL and 8.34±0.21 mmol Trolox® equivalents/g, respectively. Due to its moderate free‐radical scavenging potential and high α‐pinene content, the population ‘Mongar’ might be considered as a perspective raw material in food and phytopharmaceutical industries.
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