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Abstract
The steam volatile constituents from the aerial parts and roots of Selinum vaginatum C. B. Clarke (Apiaceae) growing wild in the central Himalayan region of Uttarakhand, India were isolated by steam distillation and analyzed by capillary gas chromatography (GC-FID) and gas chromatography-mass spectrometry (GC-MS). A total of thirty-one and forty-six constituents, representing 97.7 % and 96.7 % of the total oil composition were identified from the aerial parts and roots of S. vaginatum, respectively. The aerial parts oil consisted mainly of monoterpene hydrocarbons (48.7 %), with 2E,6E-farnesol (36.0 %), γ-terpinene (24.3 %) and β-pinene (16.3 %) as a major constituents while the roots oil mainly contains oxygenated sesquiterpenes (72.8 %), with maximum content of 2E,6Z-farnesol (60.0 %) and elemol (5.0 %). The oil samples showed significant antibacterial activity against Gram-positive Staphylococcus aureus, Enterococcus faecalis, Bacillus subtilis and Gram-negative Klebsiella pneumoniae. Minimum inhibitory concentration value (31.25 μL/mL) of the essential oil from the aerial parts was observed against Bacillus subtilis, Xanthomonas phaseoli, Klebsiella pneumoniae and Pasteurella multocida whereas from roots it was observed against Bacillus subtilis, Enterococcus faecalis, Erwinia chrysanthemi, Klebsiella pneumoniae and Salmonella enterica enterica. Both the oil samples showed bactericidal effect against B. subtilis, S. enterica enterica and E. faecalis at 62.5, 125 and 250 μl/mL, respectively.