Volatile Oil Variability in Thymus sipyleus Boiss. subsp rosulans (Borbas) Jalas Populations Collected in Turkey

Abstract

The chemical composition of the volatile oils from flowering parts of Thymus sipyleus subsp. rosulans collected from three regions were analysed by GC and GC-MS. The main constituents of the volatile oils isolated from all samples were P-caryophyllene (6.75 - 14.23%) linalool (0.11 - 22.47%), 1,8-cineol (0.05 - 16.57%), (alpha-terpineol (2.16 - 6.97%). caryophyllene oxide (1.90 - 8.11%), germacrene-D (1.36 - 5.21%) and spathulenol (2.14 - 4.82%) Thymol, which is a characteristic volatile oil in the Thymus L. genus, was not found in volatile oil ot T sipyleus. However, it was found that carvacrol was present in low amounts (0.11 - 0.35%). The samples collected from different localities have quantitative differences regarding some components. According to the results of variance analysis, the chemical components of the oil of T. sipyleus subsp. rosulans plants were showed significant differences. In the samples collected at Kastamonu higher levels of myrcene (5.20%), 1.8-cineol (16.57%), trans-sabinene hydrate (2.00%). camphor (3.64%), alpha-terpineol (6.97%) and borneol (4.04%) were also found. However, the concentrations of germacrene D-4-ol (8.16%), alpha-cadinol (6.37%), germacrene-D (5.21%), (Z)-beta-farnesene (4.40%) and bicyclogermacrene (4.03%) in the samples from Corum were in higher amounts than in the remaining samples. Therefore, the presence of variability in Thymus L. volatile oils reveals that a more careful Study for clearer eyplanations.