Articles
VARIABILITY IN THE CHEMICAL COMPOSITION OF WILD THYMUS VULGARIS L.
Article number
826_22
Pages
159 – 166
Language
English
Abstract
Representative samples of Thymus vulgaris L. collected in Castilla-La Mancha (Spain) were analyzed to study the interspecific variability of populations.
Statistical analysis of the data was performed with STATGRAPHICS and the CANDIS software from Statistical Analysis System 9 and included stepwise and multiple regression analysis (P-values < 0.05 were considered significant). The results obtained in a water distillation of volatile oils, showed a negative significant correlation between the concentration of essential oil and the latitude and altitude with a p < 0.05. The 63 samples formed by 50 plants each one, have been grouped in four classes according to the edafo-climatic characteristics of the collection sites: Z1, Mancha; Z2, Guadalajara; Z3, Mountains of Cuenca; Z4, Mountains of Albacete.
The volatile oil content of each sample has been analysed by GC. The highest yield of essential oil (2.95%) occurred in group 1 samples, with high content of linalool and low content of thymol and camphor.
The borneol and carvacrol concentration was highest in group 3 populations.
The samples of group 2 showed the highest concentration of thymol and camphor and low essential oil content and linalool concentration.
Statistical analysis of the data was performed with STATGRAPHICS and the CANDIS software from Statistical Analysis System 9 and included stepwise and multiple regression analysis (P-values < 0.05 were considered significant). The results obtained in a water distillation of volatile oils, showed a negative significant correlation between the concentration of essential oil and the latitude and altitude with a p < 0.05. The 63 samples formed by 50 plants each one, have been grouped in four classes according to the edafo-climatic characteristics of the collection sites: Z1, Mancha; Z2, Guadalajara; Z3, Mountains of Cuenca; Z4, Mountains of Albacete.
The volatile oil content of each sample has been analysed by GC. The highest yield of essential oil (2.95%) occurred in group 1 samples, with high content of linalool and low content of thymol and camphor.
The borneol and carvacrol concentration was highest in group 3 populations.
The samples of group 2 showed the highest concentration of thymol and camphor and low essential oil content and linalool concentration.
Authors
A. Cases, B. Pérez, P. Navarrete, E. Mora, B. Peña, A. Peluzzo, R. Calvo, D. Sánchez de Ron, F. Varela
Keywords
Thymus, variability, chemical composition
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