Comparative analysis of the essential oils of teucrium polium l. Grown in different arid & semi arid habitats in Jordan

الملخص EN

Teucrium polium is a widely-used medicinal herb in Jordan.

This herb is an endogenous plant species that is distributed over Irano-Turranian as well as Mediterranean regions, receiving total annual precipitation of 50 to 350 mm.

The species is one of the most variable species; variability is partly phenotypic as well as seasonal within the country.

Data on its taxonomic status to subdivisions is lacking.

This research is intended to record the possible variations in the constituents of extracts of plants collected from different regions.

Hexane extracts were prepared from T.

polium specimens, collected at pre-flowering stage from five different locations and from plants grown in the greenhouse and analyzed by gas chromatography (GC).

The results indicated the presence of several volatile compounds such as menthone, germacrene, linalool, ρ-cymene, carvone, and β-caryophyllene.

Samples from different locations showed qualitative and quantitative variations in the oil composition.

GC analysis showed also that the highest number of volatile compounds was detected in samples collected from the greenhouse and Jdaideh, while the lowest number of volatile compounds was from Gawa’a samples (both Mediterranean type-regions).