Components responsible for antimicrobial activity of propolis from continental and Mediterranean regions in Croatian

Ivana Tlak Gajger, Iva Pavlović, Mirza Bojić, Ivan Kosalec, Siniša Srečec, Toni Vlainić and Josipa Vlainić
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Ivana Tlak Gajger: Faculty of Veterinary Medicine and 3Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
Iva Pavlović: Ruđer Bošković Institute, Zagreb, Croatia
Siniša Srečec: Križevci College of Agriculture, Križevci, Croatia
Toni Vlainić: Ruđer Bošković Institute, Zagreb, Croatia
Josipa Vlainić: Ruđer Bošković Institute, Zagreb, Croatia

Czech Journal of Food Sciences, 2017, vol. 35, issue 5, 376-385

Abstract: Propolis is a popular subject of research worldwide due to its therapeutic potential. The antimicrobial activity of propolis appears to be promising but depends on many variables related to its origin such as the content of phenolics and flavonoids. To address this issue with Croatian propolis, which has two major origins (Mediterranean and continental), we exposed bacteria (Escherichia coli and Staphylococcus aureus) and yeasts (Candida albicans and Aspergillus niger) to different propolis concentrations (two-fold microdilution method with TCC/formazan endpoint). Total phenolic and flavonoid content and chromatographic profile along with antioxidant activity were assessed. The majority of the 24 propolis samples tested exhibited potent antimicrobial activity against S. aureus bacteria and the yeast C. albicans. Most propolis samples also exhibited robust antioxidative capacity which correlated polyphenol and flavonoid content. To the best of our knowledge this is the first study in which the antimicrobial activity of Croatian propolis is correlated with its constituents.

Keywords: propolis; antimicrobial effects; phenols; flavonoids; DPPH; FRAP; HPLC analyses; correlations (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:35:y:2017:i:5:id:103-2017-cjfs

DOI: 10.17221/103/2017-CJFS

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