Study on chemical compositions of essential oil of some Salvia mirzayanii Rech. f. & ‎Esfand. natural populations in Hormozgan province

Salvia mirzayanii Rech. f. & Esfand. is an endemic medicinal plant which belonging to the Lamiaceae family where grows wild in Iran. In the present study, the aerial parts of this plant were collected at full flowering stage from four habitats in Hormozgan province including Dagh-e-Fino, Sarchahan, Bastak, Sirmand and Tang-e-Zagh. The plant materials were dried at shade and at room temperature. The essential oils were obtained by hydro-distillation with three replications, the yields were calculated based on dry weight and the oils were analyzed by GC and GC/MS. Results showed that the essential oil contents from Dagh-e-Fino, Sarchahan, Bastak, Sirmand and Tang-e-Zagh natural populations obtained 1.3, 1.2, 1.1, 1.2 and 1.4 (w/w %), respectively. A total of 40 compounds were identified in the essential oils of the aerial parts of S. mirzayanii, of which 28 compounds were common to all natural populations. The most identified chemical components were observed in Dagh-e-Fino and Bastak populations (36 compounds) and the lowest in Sarchahan population (33 compounds). Results of essential oil compound analysis revealed that δ-cadinene, linalool, 1,8-cineol, α-terpineol, γ-cadinene and α-terpinyl acetate were the major compounds among the essential oils of studied populations. Existence of differences among populations of S. mirzayanii showed that in addition to the effect of plant inheritance, it also has a high adaptation potential so that a wide range of climatic conditions.