Nguyen Hai Van, Meile Jean-Christophe, Lebrun Marc, Caruso Domenico, Chu-Ky Son, Sarter Samira. 2018. Litsea cubeba leaf essential oil from Vietnam: chemical diversity and its impacts on antibacterial activity. Letters in Applied Microbiology, 66 (3) : 207-214.
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Quartile : Q3, Sujet : BIOTECHNOLOGY & APPLIED MICROBIOLOGY / Quartile : Q4, Sujet : MICROBIOLOGY
Résumé : The threat of bacterial resistance to antibiotics has created an urgent need to develop new antimicrobials. The aim of this study was to characterize the chemical diversity of Litsea cubeba leaf essential oil (EO) and its impacts on the antibacterial activity against pathogenic bacteria. Essential oils collected from seven provinces in North Vietnam (n = 25) were characterized by their high content in either 1,8‐cineole or linalool. Linalool‐type EOs were more effective against the eight bacterial strains tested than 1,8‐cineole‐type. Oil samples, LC19 (50% 1,8‐cineole) and BV27 (94% linalool), were selected to investigate their antibacterial mechanisms against Escherichia coli. A strong bactericidal effect was observed after 4 and 2 h of exposure respectively. Microscopic analysis of treated E. coli cultures clearly showed that EOs caused changes in cell morphology, loss of integrity and permeability of the cell membrane, as well as DNA loss. However, the effects of both EOs were distinct. LC19 mostly affected cell membrane, led to a significant cell filamentation rate and altered cell width, whereas BV27 damaged cell membrane integrity leading to cell permeabilization and altered nucleoid morphology with the appearance of spot and visibly altered compaction.
Mots-clés Agrovoc : huile essentielle, antimicrobien, feuille
Mots-clés géographiques Agrovoc : Viet Nam
Classification Agris : F60 - Physiologie et biochimie végétale
000 - Autres thèmes
Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse
Auteurs et affiliations
- Nguyen Hai Van, HUST (VNM)
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Meile Jean-Christophe, CIRAD-PERSYST-UMR Qualisud (REU)
ORCID: 0000-0002-6747-2104
- Lebrun Marc, CIRAD-PERSYST-UMR Qualisud (FRA)
- Caruso Domenico, IRD (FRA)
- Chu-Ky Son, HUST (VNM)
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Sarter Samira, CIRAD-PERSYST-UMR ISEM (FRA) ORCID: 0000-0001-5115-0824 - auteur correspondant
Source : Cirad-Agritrop (https://agritrop.cirad.fr/586590/)
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