Essential Oil Compositions and Antimicrobial Activity of the Leaves of Alphonsea monogyma Merr. & Chun and Goniothalamus banii B. H. Quang, R. K. Choudhary & V.T. Chinh from Vietnam

• Published in: Records of natural products Vol. 17; no. 3; pp. 571 - 576
• Main Authors: Ogunwande, Isiaka Ajani, Huong, Le Thi, Giang, Le Duc, Dai, Do Ngoc
• Format: Journal Article
• Language: English
• Published: Gebze ACG Publications 01.05.2023
• Subjects: Antimicrobial agents; Chromatography; Oils & fats; Vietnam
• ISSN: 1307-6167; 1307-6167
• DOI: 10.25135/rnp.367.2208.2547

Essential oils from the leaves of Alphonsea monogymaMerr. & Chun and Goniothalamus banii B. H. Quang, R. K. Choudhary & V.T. Chinh from Vietnam were obtained by hydrodisitllation and the chemical components determined by gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC/MS). Also the microdilution broth assay was used to test the antimicrobial activity of the essential oils. The respective yields of the essential oils were 0.18% (v/w) and 0.355% (v/w), respectively. The major components of A. monogymawere (E)-caryophyllene (13.8%), d-cadinene (12.5%), bicyclogermacrene (12.4%), cis-β-elemene (12.1%), and germacrene D (11.4%). However, myrcene (47.1%), α-pinene (9.7%) and (E)-caryophyllene (9.1%) were the dominant constituents of the essential oil of G. banii. The leaf essential oil of A. monogymadisplayed potent antimicrobial activity towards the Gram-positive microorganisms of Enterococcus faecalisATCC299212, Staphylococcus aureusATCC25923 and Bacillus cereusATCC14579 with minimum inhibitory concentration (MIC) values of 2.23 µg/mL, 10.45 µg/mL and 10.33 µg/mL, respectively. On the other hand, essential oil from G. baniiexhibited the most effective antibacterial against Gram-negative Pseudomonas aeruginosaATCC27853 (MIC 5.67 µg/mL), and anti-candidal action towards Candida albicans ATCC10231 (MIC 32.67 µg/mL). The chemical constituents and antimicrobial activity of the essential oils of A. monogymaand G. banii were being reported for the first time.