title: Comparative phytochemical and antimicrobial investigations of Hypericum perforatum L. subsp. perforatum and H. perforatum subsp. angustifolium (DC.) Gaudin.
abstract: The aerial parts of H. perforatum subsp. perforatum and H. perforatum subsp. angustifolium were investigated for their chemical composition and antimicrobial activity. Spectrophotometric analysis indicated that H. perforatum subsp. perforatum is richer in flavonoids and tannins than the other subspecies. HPLC analysis confirmed the higher yield of flavonoids in H. perforatum subsp. perforatum and gave also a higher content of phenolic acids. H. perforatum subsp. angustifolium contained more hypericin. The presence of rutin was proven only in H. perforatum subsp. perforatum. The antimicrobial activity of the extracts of both subspecies was evaluated based on the inhibition zone diameters using the hole-plate diffusion method. The MeOH extracts, dichloromethane and petroleum ether fractions were effective against Staphylococcus aureus, S. epidermidis, Enterococcus faecalis and Bacillus subtilis. The results indicate that H. perforatum subsp. angustifolium had a stronger antimicrobial effect than the other subspecies.
authors.affiliation: Department of Pharmaceutical Botany, Faculty of Pharmacy and Biochemistry, University of Zagreb, 10000 Zagreb, Croatia. zmales@pharma.hr
authors.forename: Zeljan
authors.initials: Z
authors.lastname: Males
authors.forename: Adelheid H
authors.initials: AH
authors.lastname: Brantner
authors.forename: Katarina
authors.initials: K
authors.lastname: Sović
authors.forename: Kroata Hazler
authors.initials: KH
authors.lastname: Pilepić
authors.forename: Misko
authors.initials: M
authors.lastname: Plazibat
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000302:isolation & purification / Q000494:pharmacology; D062385:Hydroxybenzoates / Q000302:isolation & purification / Q000494:pharmacology; D020902:Hypericum / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology*; D012431:Rutin / Q000302:isolation & purification / Q000494:pharmacology; D013045:Species Specificity; D013053:Spectrophotometry; D013634:Tannins / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D005419:Flavonoids; D062385:Hydroxybenzoates; D010936:Plant Extracts; D013634:Tannins; D012431:Rutin; C017616:phenolic acid