Michalina Adaszynska- Skwirzynska, Maria Swarcewicz and Agnieszka Dobrowolska
Only the flowers of lavender (Lavandula angustifolia) are utilized for the medical purposes. The aim of the current study was to compare the chemical composition, concentrations of flavonoids and sesquiterpene acids in the leafy stems in two varieties of lavender oils the ‘Blue River’ (BR) and the ‘Ellegance Purple’ (EP). Their biological activity against four pathogenic bacteria Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Enterococcus faecalis was study. The main constituents were borneol (13.8-12.4%), and caryophyllene oxide (8.0- 8.7%). Total flavonoids content were similar in both plants, from 341 to 352 mg/100 g. The valerenic acid was from 1.08 to 0.81 mg/100 g in BR and EP, respectively. The acetoxyvalerenic acid was from 45.9 to 14.0 mg/100 g, respectively. The highest increase of S. aureus bacteria was inhibited by the activity of the essential oils from both varieties. The less effect of inhibition was noticed for Escherichia coli for both plants.
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