TLC-direct bioautography as a bioassay guided method for investigation of antibacterial compounds in Hypericum perforatum L.

Wioleta Jesionek, Ágnes M. Móricz, Ágnes Alberti, Péter G. Ott, Béla Kocsis, Györgyi Horváth, Irena M. Choma

Research output: Article

16 Citations (Scopus)


Fast high-throughput TLC-direct bioautography (DB) is an effect-directed analysis method that enables searching for biologically active (e.g., antimicrobial) substances in complex mixtures like plant extracts. The principle of the method is that separation and detection of biological properties of given mixture components is performed directly on a TLC plate. In searching for antibacterial activity, the developed plate is immersed in a bacterial broth, and bacteria grow directly on its layer during a proper incubation time. Inhibition zones are formed in places where antimicrobial components are located. The active compounds can be further identified using spectroscopic techniques. The aim of our study was investigation of plant components of Hypericum perforatum L. tincture by TLC-DB using nine bacterial strains: Micrococcus luteus, Bacillus subtilis, Escherichia coli, Staphylococcus aureus, methicillin-resistant S. aureus, S. epidermidis, Pseudomonas syringae pv. maculicola, Xanthomonas campestris pv. vesicatoria, and Aliivibrio fischeri. Compounds showing the widest range of antimicrobial activity were isolated using semipreparative TLC and identified as apigenin, 3,8'-biapigenin, quercetin, kaempferol, and linolenic acid by TLC, HPLC-diode array detection, and HPLC/MS/MS techniques.

Original languageEnglish
Pages (from-to)1013-1020
Number of pages8
JournalJournal of AOAC International
Issue number4
Publication statusPublished - júl. 1 2015


ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science
  • Environmental Chemistry
  • Agronomy and Crop Science
  • Pharmacology

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