Document Type : Research Paper
Authors
1 MS Student of Payam-e-Noor University
2 Academic members of Research Institute of Forests and Rangelands
3 Academic member of Payam-e-Noor University
Abstract
Vitex L. (250 species) is a large tropical genus with a few temperate species. Examining the morphological characters of leave, stem, corolla and calyx together, with the micro-morphological observations, revealed the occurrence of four species in the flora of Iran. These species are V. agnus-castus, V. negundo, V. trifolia and V. pseudo-negundo. In this research, four species of Vitex werecollected in flowering stage from their natural habitats. Hydro-distillation method was used to obtaining the essential oils. Essential oils components were identified by capillary GC and GC/MS. In the oil of V. agnus-castus, the main components of essential oil were monoterpenoids (82.8%) with 1,8-cineole (18.5%), α-pinene (17.8%) and limonene (15.7%) as major components. In the oil of V. pseudo-negundo, the main components of the essential oil were sesquiterpenoids (50.7%) which have the highest amount in comparing with other species and include α-guaiene (14.2%), germacrene D (11/6%) and α-cadinol (10%). Also the monoterpenoids of the oil of this species were α-pinene (10.3-24.5%), limonene (4.4-12.8%) and 1,8-cineole (10.9%). In the oil of V. negundo the major components were monoterpenoids (66.6%), among them 1,8-cineole (20.8%) and α-pinene (18.8%) were the main components. In the oil of V. trifolia, the major components were monoterpenoids (67.1%) and the main constituents were identified as sabinene (24.6%) and α- pinene (23.9%). 1,8-cineole was not found in the oil of this species. β-caryophyllene was identified at higher percentage (10.5%) in the oil of V. trifolia
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