Abstract
Lavandula stricta belongs to the Lamiaceae family and is considered as an endemic medicinal plant in southern Iran. Essential oil composition, total phenolic content and antioxidant activity from two different populations of L. stricta were studied for the first time. A GC and GC/MS analysis of essential oil isolated from the aerial part of L. stricta identified 31 constituents; the major constituents were α-pinene (58.34–63.52%), linalool (8.85–9.36%), 3-methyl butyl 2-methyl butanoate (7.45–7.70%), sabinene (2.84–3.56%), limonene (2.87–3.21%) and myrcene (2.25%). The total phenolic content of methanolic extracts was determined with the Folin–Ciocalteu reagent and the antioxidant activity of methanolic extract and essential oil were determined with the 2, 2-diphenyl-1-picryl hydrazyl free radical scavenging assay, respectively. Total phenols varied from 61.05 to 64.45 mg GAE/g dry weight, and IC50 values in the radical scavenging assay ranged from 334.11 to 395.23 μg/mL in methanolic extracts and 420–475 μg/mL in essential oil.
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