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• W2776136976 abstract "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. This study aimed to characterize the chemical diversity of Litsea cubeba leaf essential oil (EO) and its impacts on its antibacterial activity. Two major chemotypes (1,8‐cineole or linalool rich) were identified in North Vietnam and both were bactericidal against several pathogenic bacteria. A distinct inhibitory effect of EO samples on Escherichia coli was observed. 1,8‐cineole‐rich sample (LC19) affected cell membrane, led to cell filamentation and perturbation of cell width, while the linalool‐rich one (BV27) induced damages in the cell membrane and changes in the nucleoid morphology. The study demonstrates the importance of considering chemotype variations in terms of chemical composition as well as the mode of action." @default.
• W2776136976 created "2018-01-05" @default.
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• W2776136976 date "2018-01-29" @default.
• W2776136976 modified "2023-10-18" @default.
• W2776136976 title "<i>Litsea cubeba</i> leaf essential oil from Vietnam: chemical diversity and its impacts on antibacterial activity" @default.
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• W2776136976 doi "https://doi.org/10.1111/lam.12837" @default.
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