Chemical Composition and Antimicrobial Activities of the Essential Oils of<i>Teucrium chamaedrys</i>. subsp.<i>chamaedrys</i>.,<i>T. orientale</i>. var.<i>puberulens</i>., and<i>T. chamaedrys</i>. subsp.<i>lydium</i>.

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.