Acta Pharmaceutica, Vol. 56 No. 3, 2006.
Original scientific paper
Comparative phytochemical and antimicrobial investigations of Hypericum perforatum L. subsp. perforatum and H. perforatum subsp. angustifolium (DC.) Gaudin
ŽELJAN MALEŠ
ADELHEID H. BRANTNER
KATARINA SOVIĆ
KROATA HAZLER PILEPIĆ
MIŠKO PLAZIBAT
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 is 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, the dichloromethane and petroleum ether fractions were effective against Staphylococcus aureus, S. epidermidis, Enterococcus faecalis and Bacillus subtilis. The results indicated that H. perforatum subsp. angustifolium showed a stronger antimicrobial effect than the other subspecies.
Keywords
H. perforatum subsp. Perforatum; H. perforatum subsp. Angustifolium; flavonoids; phenolic acids; hypericin; tannins; HPLC analysis; antimicrobial activity
Hrčak ID:
4546
URI
Publication date:
1.9.2006.
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