Chemical Composition and Antimicrobial Activities of the Essential Oils ofTeucrium chamaedrys. subsp.chamaedrys.,T. orientale. var.puberulens., andT. chamaedrys. subsp.lydium.

Abstract

The composition of the essential oils obtained from the air-dried Teucrium chamaedrys L. subsp. chamaedrys, Teucrium orientale L. var. puberulens, and Teucrium chamaedrys L. subsp. lydium (Lamiaceae) were analyzed by GC-MS. Thirty-six, 35, and 33 components were identified in the essential oils, and germacrene D (16.7%) was the most abundant constituent in T. chamaedrys subsp. chamaedrys, and b-caryophyllene was the most abundant component in both T. orientale var. puberulens and T. chamaedrys subsp. lydium in the ratios 21.7% and 19.7%, respectively. The isolated essential oils of the plants were tested for antimicrobial activity and showed moderate antibacterial activity against Gram-positive and Gram-negative bacteria, but no antifungal activity was observed against two yeast-like fungi.

Chemical constituents and antimicrobial activities of the essential oils fromSedum pallidumvar.bithynicumandS. spuriumgrown in Turkey

“…Retention indices of all the components were determined by Kovats method (Miller & Bruno, 2003) using n-alkanes (C 6 -C 32 ) as standards. Identification of individual components was made by comparison of their retention times with those of available analytical standards (-pinene, camphene, linalool, geraniol, n-tetradecane, n-pentadecane, n-heptadecane, and n-octadecane), and by computer searching, matching mass spectral data with those held in the National Institute of Standards and Technology (NIST) and Wiley libraries of mass spectra and literature comparison (Adams, 2004;Javidnia et al, 2005;Jovanovic et al, 2004;Güleç et al, 2007;Küçük et al, 2006;Skaltsa et al, 2001Skaltsa et al, , 2003Yaylı et al, 2005;Couladis et al, 2002).…”

“…GC-MS analyses were described previously (Güleç et al, 2007;Küçük et al, 2006;Yaylı et al, 2005). Retention indices of all the components were determined by Kovats method (Miller & Bruno, 2003) using n-alkanes (C 6 -C 32 ) as standards.…”

Chemical composition and antimicrobial activity of essential oils fromCentaurea appendicigeraandCentaurea helenioides

“…The obtained crude essential oils were then investigated by GC-MS. Identification of the compounds was made by a typical library search (NIST, WILEY) and literature comparison (Adams, 2004;Flamini et al, 2002;Dural et al, 2003;Ertuğrul et al, 2003;Skaltsa et al, 2000Skaltsa et al, , 2003Simiç et al, 2004;Javidnia et al, 2004Javidnia et al, , 2005Couladis et al, 2002;Fokialakis el al., 2002Fokialakis el al., , 2003Yaylı et al, 2005;Jovanovic et al, 2004;Küçük et al, 2006).…”

“…The chemical composition of essential oils differs in each species or subspecies. The compositional studies of essential oils have been carried out extensively by using gas chromatography-mass spectrometry (GC-MS), which is based on the comparison of the relative retention times/indices and mass spectra of the specific natural compounds found in an essential oil (Adams, 2004;Flamini et al, 2002;Dural et al, 2003;Skaltsa et al, 2003;Simiç et al, 2004;Javidnia et al, 2005;Yaylı et al, 2005;Fokialakis et al, 2002;Jovanovic et al, 2004;Küçük et al, 2006).…”

Chemical traits and antimicrobial activity of endemic Teucrium arduini L. from Mt Biokovo (Croatia)

“…Sesquiterpenes are identified as dominant compounds in the essential oils of several Teucrium species [22]. According to this, sesquiterpene germacrene D (16.9%) was a major compound in the oil of T. aurdini from Montenegro [23], β-caryophyllene in the oil of T. orientale (21.7%), T. chamaedrys (19.7%) [24], T. scordium (22.8%) [25], T. royleanum (23.6%) and T. quadrifarium (38.3%) [26], and caryophyllene-oxide was a main compound in the essential oils of T. stocksianum (5.7%) and T. montbretii (8.8%) [27]. Caryophyllene-oxide was a main compound in the essential oil of T. stocksianum Boiss.…”