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Abstract
The aim of the study was to compare the composition and antimicrobial activity of essential oils obtained from flowers and leafy stalks of two cultivars of Lavandula angustifolia: ‘Blue River’ and ‘Ellagance Purple’. Using gas chromatography with mass selective detector (GC-MS) method, 47 of their components were identified and quantified. The composition and activity of essential oils varied with the type of cultivar and the morphological part of the plant. The main components of essential oils obtained from flowers were: linalool, linalool acetate, lavandulol acetate and α-terpineol. Essential oils from leafy stalks contained mainly: borneol, epi-bicyclosesquiphellandrene, caryophyllene, eucalyptol and linalool. The significant inhibition of pathogenic microorganisms growth: S. aureus, P. aeruginosa and C. albicans was observed for all tested oils, but some important differences in their activity were found and compared to linalool. The relationship between the composition and biological activity was discussed.