دراسة تأثير الموقع الجغرافي في مكونات الزيت العطري لنبات الجعدة Teucrium Polium

Abstract

This study was carried out during  the period 2022-2023 to examine the composition of the essential oil of Teucrium polium L., which grows wild in two locations with different elevations, namely Ras al-Ain at an altitude of 130 m above sea level and Halabko at an altitude of 1139 m above sea level. Both locations are located in the Jableh region of Lattakia Governorate, and to study the effect of some environmental factors (elevation above sea level, exposure, soil) on some chemical properties and proportions of the essential essential oil and its components. Gas chromatography coupled with mass spectrometry (GC-MS) revealed variations in the oil components and their proportions between the two studied sites (Ras al-Ain and Halabko) as well as between the selected slopes within one site. The oil extracted from the plants of the southern slope of the Ras al-Ain site contained 25 chemical components, while it contained 19 and 10 components from the western and northern slopes, respectively. The oil extracted from the plants of the western slope of the Halabko site contained 21 chemical components, compared to 16 and 12 for each of the southern and northern slopes, respectively. The proportions of components also differed between the studied sites.                                                                                                        

These results indicate the influence of climate on the components and proportions of oil in the jadah plant, and thus the possibility of focusing on its cultivation in specific areas to obtain specific compounds in high proportions.