Composition and Antimicrobial Activity of the Essential Oils of Scutellaria sieberia Benth. and Scutellaria rupestris Boiss. et Heldr. ssp. adenotricha (Boiss. et Heldr.) Greuter et Burdet from Greece

The essential oils of Scutellaria sieberi and S. rupestris ssp. adenotricha from Greece were analyzed by means of GC/MS. Forty-nine constituents were identified representing 87.1% and 81.4% of the oils, respectively. Linalool (22.7%), β-caryophyllene (14.2%), (2R, 5E)-caryophyll-5-en-12-al (6.3%) and (2S, 5E)-caryophyll-5-en-12-al (14.1%) were the major components of S. sieberi, whereas in S. rupestris ssp. adenotricha linalool (38.8%), geraniol (8.1%) and α-terpineol (7.1%) were the major components. Furthermore, the oils were tested against H. pylori, as well as against six aerobically growing bacteria.