Abstract
Antibacterial activities of various flavonoids, a group of natural plant substances, have been reported previously, however, there are contradictory data, published by various authors, regarding sensitivity of particular bacterial species to these compounds. These problems arose apparently because of using different methods by various researchers. Here we tested sensitivity of several bacterial species (Gram-positive: Bacillus subtilis, Micrococcus luteus, Sarcina sp. and Staphylococcus aureus; and Gram-negative: Citrobacter freundii, Escherichia coli, Klebsiella pneumoniae, Proteus vulgaris, Pseudomonas aeruginosa, Salmonella enterica, Serratia marcescens and Vibrio harveyi) to various flavonoids: genistein and daidzein (isoflavones), apigenin (a flavone), naringenin (a flavanone) and kaempferol (a flavonol) by measurement of generation times of bacteria in liquid cultures. The presented results indicate that this simple method is adequate for unambiguous assessment of sensitivity of bacterial strains to flavonoids.
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Ulanowska, K., Majchrzyk, A., Moskot, M. et al. Assessment of antibacterial effects of flavonoids by estimation of generation times in liquid bacterial cultures. Biologia 62, 132–135 (2007). https://doi.org/10.2478/s11756-007-0042-3
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DOI: https://doi.org/10.2478/s11756-007-0042-3