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Bioclimatic influence on essential oil composition in South Iberian Peninsular populations of Thymus zygis / Rafael Pérez-Sánchez in The journal of essential oil research, Vol. 24 N° 1 (Fevrier 2012) 

Public ISBD [article]  in The journal of essential oil research > Vol. 24 N° 1 (Fevrier 2012) . - pp. 71-81 Titre : Bioclimatic influence on essential oil composition in South Iberian Peninsular populations of Thymus zygis Type de document : texte imprimé Auteurs : Rafael Pérez-Sánchez, Auteur ; Cándido Gálvez, Auteur ; José L. Ubera, Auteur Année de publication : 2012 Article en page(s) : pp. 71-81 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Thymus  zygis  Labiatae  Essential  oils  Variability  Bioclimatic  influence  Environmental  factors  Canonical  analysis Résumé : The variation in yield and essential oil composition of some plants of Thymus zygis was studied through their life cycle. The relationship between the concentration of the essential oils’ main compounds and the most frequently used bioclimatic indices was stated. Individual samples from seven populations growing wild in the South Iberian Peninsula were studied to assess the phenological variation of their oils. The samples showed a maximum yield at the flowering stage. The most representative compounds were selected, statistically analyzed and clustered in two groups, called thymol and γ-terpinene according to their behavior through the cycle of the plants studied. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.646025 [article] Bioclimatic influence on essential oil composition in South Iberian Peninsular populations of Thymus zygis [texte imprimé] / Rafael Pérez-Sánchez, Auteur ; Cándido Gálvez, Auteur ; José L. Ubera, Auteur . - 2012 . - pp. 71-81. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 24 N° 1 (Fevrier 2012) . - pp. 71-81 Mots-clés : Thymus  zygis  Labiatae  Essential  oils  Variability  Bioclimatic  influence  Environmental  factors  Canonical  analysis Résumé : The variation in yield and essential oil composition of some plants of Thymus zygis was studied through their life cycle. The relationship between the concentration of the essential oils’ main compounds and the most frequently used bioclimatic indices was stated. Individual samples from seven populations growing wild in the South Iberian Peninsula were studied to assess the phenological variation of their oils. The samples showed a maximum yield at the flowering stage. The most representative compounds were selected, statistically analyzed and clustered in two groups, called thymol and γ-terpinene according to their behavior through the cycle of the plants studied. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.646025

Composition and variability of the essential oil in thymus zygis from southern Spain / Rafael Pérez-Sánchez in The journal of essential oil research, Vol. 20 n°3 (Mai/Juin 2008) 

Public ISBD [article]  in The journal of essential oil research > Vol. 20 n°3 (Mai/Juin 2008) . - pp. 192-200 Titre : Composition and variability of the essential oil in thymus zygis from southern Spain Type de document : texte imprimé Auteurs : Rafael Pérez-Sánchez, Auteur ; José L. Ubera, Auteur ; Fernando Lafont, Auteur Année de publication : 2008 Article en page(s) : pp. 192-200 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Thymus  zygis  Labiatae  Spanish  thyme  Essential  oil  composition  p-cymene  1,8-cineole  γ-terpinene  α-terpineol  Linalool  Camphor  Borneol  Thymol  Carvacrol  β-caryophyllene  Caryophyllene  oxide  Chemotypes  Principal  component  analysis Résumé : An investigation by GC/MS into the composition and variability of the essential oils contained in 63 individual plants taken from 21 populations of Thymus zygis L. in Southern Spain was carried out. Chemometric investigation of the infraspecific variability of the essential oils of these populations led to the differentiation of seven main chemotypes: thymol, carvacrol, linalool, α-terpinyl acetate, thymol/p-cymene/γ-terpinene, 1,8-cineole/myrcene/spathulenol and 1,8-cineole/α-terpineol. The phenolic compound thymol was the most common constituent in the majority of the samples studied. The concentration of its precursors, p-cymene and γ-terpinene was also noteworthy. There was no chemotaxonomic differentiation between the two subspecies (gracilis and sylvestris) for the Thymus zygis plants studied. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2008.9699989 [article] Composition and variability of the essential oil in thymus zygis from southern Spain [texte imprimé] / Rafael Pérez-Sánchez, Auteur ; José L. Ubera, Auteur ; Fernando Lafont, Auteur . - 2008 . - pp. 192-200. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 20 n°3 (Mai/Juin 2008) . - pp. 192-200 Mots-clés : Thymus  zygis  Labiatae  Spanish  thyme  Essential  oil  composition  p-cymene  1,8-cineole  γ-terpinene  α-terpineol  Linalool  Camphor  Borneol  Thymol  Carvacrol  β-caryophyllene  Caryophyllene  oxide  Chemotypes  Principal  component  analysis Résumé : An investigation by GC/MS into the composition and variability of the essential oils contained in 63 individual plants taken from 21 populations of Thymus zygis L. in Southern Spain was carried out. Chemometric investigation of the infraspecific variability of the essential oils of these populations led to the differentiation of seven main chemotypes: thymol, carvacrol, linalool, α-terpinyl acetate, thymol/p-cymene/γ-terpinene, 1,8-cineole/myrcene/spathulenol and 1,8-cineole/α-terpineol. The phenolic compound thymol was the most common constituent in the majority of the samples studied. The concentration of its precursors, p-cymene and γ-terpinene was also noteworthy. There was no chemotaxonomic differentiation between the two subspecies (gracilis and sylvestris) for the Thymus zygis plants studied. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2008.9699989