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Abstract
Essential oils from the rhizomes of Boesenbergia quangngaiensis N.S. Lý were obtained by hydrodistillation and the chemical components were determined by gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC/MS). In addition, the microdilution broth assay was used to test the antimicrobial activity of essential oils. The yield of the B. quangngaiensis rhizome essential oils was 0.16 % (w/w). The major components identified from the rhizome essential oil of B. quangngaiensis were cis-β-elemene (18.4 %), zerumbone (11.4 %) and myrtenyl acetate (10.6 %). The antimicrobial activity test indicated that B. quangngaiensis rhizome essential oil displayed good activity against Pseudomonas aeruginosa ATCC 27853 with a Minimum inhibitory concentration (MIC) value of 7.68 μg/mL and IC50 value of 16.0 μg/mL. Also, the essential oil inhibited the growth of other tested bacteria and yeast, except Escherichia coli ATCC 25922 and Salmonella enterica ATCC 13076, with MIC value of about 30 μg/mL. The chemical components and antimicrobial activity of the B. quangngaiensis rhizome essential oil were reported for the first time.