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Influence of environmental factors on essential oil variability in thymbra capitata (L.) cav. growing wild in southern puglia (Italy) / Luca Tommasi in The journal of essential oil research, Vol. 19 N°6 (Novembre/Decembre 2007) 

Public ISBD [article]  in The journal of essential oil research > Vol. 19 N°6 (Novembre/Decembre 2007) . - pp. 572-580 Titre : Influence of environmental factors on essential oil variability in thymbra capitata (L.) cav. growing wild in southern puglia (Italy) Type de document : texte imprimé Auteurs : Luca Tommasi, Auteur ; Carmine Negro, Auteur ; Antonio Cerfeda, Auteur Année de publication : 2008 Article en page(s) : pp. 572-580 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Thymbra  capitata  Lamiaceae  Essential  oil  composition  Thymol  Carvacrol  Chemotypes  Environmental  variation Résumé : The composition of officinal plants in terms of active principles exhibits high intraspecific variability which is determined not only genetically but also by environmental conditions, growth area and harvesting time. This study analyzed the essential oil variability in Thymbra capitata (L.) Cav. in specimens growing wild in 23 places in Southern Puglia (Italy). The results show high chemical polymorphism in the oil content of T. capitata. Application of the spatial autocorrelation index to the principal components highlighted a relationship between thermal parameters and the composition in terms of active principles. The carvacrol chemotype was only present under the hottest and driest conditions. These results show that not only is the biosynthetic pathway of phenolic monoterpenes in T. capitata favored in high-temperature environments, as reported in other Lamiaceae, but also that carvacrol is present only in markedly “Mediterranean-like” environments. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2007.9699335#.UXJrbkqC5mM [article] Influence of environmental factors on essential oil variability in thymbra capitata (L.) cav. growing wild in southern puglia (Italy) [texte imprimé] / Luca Tommasi, Auteur ; Carmine Negro, Auteur ; Antonio Cerfeda, Auteur . - 2008 . - pp. 572-580. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 19 N°6 (Novembre/Decembre 2007) . - pp. 572-580 Mots-clés : Thymbra  capitata  Lamiaceae  Essential  oil  composition  Thymol  Carvacrol  Chemotypes  Environmental  variation Résumé : The composition of officinal plants in terms of active principles exhibits high intraspecific variability which is determined not only genetically but also by environmental conditions, growth area and harvesting time. This study analyzed the essential oil variability in Thymbra capitata (L.) Cav. in specimens growing wild in 23 places in Southern Puglia (Italy). The results show high chemical polymorphism in the oil content of T. capitata. Application of the spatial autocorrelation index to the principal components highlighted a relationship between thermal parameters and the composition in terms of active principles. The carvacrol chemotype was only present under the hottest and driest conditions. These results show that not only is the biosynthetic pathway of phenolic monoterpenes in T. capitata favored in high-temperature environments, as reported in other Lamiaceae, but also that carvacrol is present only in markedly “Mediterranean-like” environments. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2007.9699335#.UXJrbkqC5mM