Chemical Composition and Anti Bacterial Activity of the Essential Oil From Aerial Parts of Torilisleptophylla and Thecocarpusmeifolius

The genus of Torilis from Umbelliferae family comprises of 10-15 species which have been distributed in Europe, north of Africa and south-west of Asia. Nine species of this genus are found in Iran. Phytochemical investi-gation of different species of Torilis ha-ve shown that they contain comarins, flavonoid and sesquiterpenes compou-nds. The genus of Thecocarpus which also belongs to Umbelliferae family has only one species in Iran.There is no any report on the phytochmistry of this ge-nus in literature. In the research, the essential oil of the aerial parts of Torilisleptophylla, collected from Ilam province, was obtained by hydro-distill-ation using a Clevenger-type apparatus for 3h. The essential oil of the aerial pa-rts of Thecocarpusmeifolius, collected from Shahr-e-Kourd city, was extracted by a microwave apparatus. Theessential oils were analysed by a GC/MS system. Inthe essential oil of the aerial parts of Torilisleptophylla 63 compoun-ds representing 92.14%, were identified in which spathulenol (15.74%), trans-α-bergamothene (9.37%) and germacrene D (8.94%) were the major constituents. 41 constituents representing 92.4% we-re identified in the essential oil of Thec-ocarpusmeifolius in which spathulenol (30.8%), caryophyllene oxide (8.9%) and germacrene D (6.0%) were the major ones. Antibacterial activity of both oils against the Gram-positive and Gram-negative bacteria was investiga-ted. Both oils showed inhibitor against Gram-positive bacteria. Discussion & Both oils sh-owed significant inhibitory effects agai-nst Gram positive bacteria.