Compositions of the Essential Oils of Teucrium cavernarum and Teucrium paederotoides, Two Endemic Species from Turkey

Abstract

The essential oils from aerial parts of Teucrium cavernarum P. H. Davis and Teucrium paederotoides Boiss. & Hausskn. (Lamiaceae) both of which are endemic species in Turkey were isolated by steam distillation and analysed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Plants were collected during the flowering period from Karaman (T. cavernarum) and Gaziantep (T. paederotoides) province of Turkey. Thirty compounds were identified in the oil of T. cavernarum and seventy three compounds were identified in the oil of T. paederotoides. The major components were characterized as beta-caryophyllene (32.9 %), germacrene D (20.7 %), caryophyllene oxide (14.1 %) and bicyclogermacrene (6.3 %) for T. cavernarum and germacrene-D (20.8 %), pulegone (9.5 %), bicyclogermacrene (9.2 %), hexacecanoic acid (7.9 %) and spathulenol (6.5 %) for T. paederotoides, respectively.