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Seasonal variation of leaf, stem and umbel ray essential oils of bupleurum gibraltarium lam. / Ana M. Fernández-Ocaña in The journal of essential oil research, Vol. 18 N° 4 (Juillet-Août 2006) 

Public ISBD [article]  in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 396-401 Titre : Seasonal variation of leaf, stem and umbel ray essential oils of bupleurum gibraltarium lam. Type de document : texte imprimé Auteurs : Ana M. Fernández-Ocaña, Auteur ; Carlos Fernández-Lôpez, Auteur ; Ana M. Camacho-Simarro, Auteur Année de publication : 2006 Article en page(s) : pp. 396-401 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Bupleurum  gibraltarium  Apiaceae  Essential  oil  composition  Seasonal  variation  Sabinene  α-pinene  Limonene  2,3,4-trimethylbenzaldehyde Résumé : The yield and composition of essential oils from leaves, stems, umbel rays and also from whole aerial parts of Bupleurum gibraltarium Lam. (Apiaceae) were determined during the pre-flowering, full flowering, late flowering, and fruiting vegetative periods. A fruit sample was also studied for comparative purposes. Leaves (0.8–1.8% yield) and stems (0.3–0.7%) reached their maximum oil content during the late flowering period, whereas umbel rays (2.2–3.7%) reached it in full flowering. Oil samples were analyzed by capillary GC and GC/MS: components which were found in amounts greater than 2% were selected to carry out a seasonal study. In the leaf oils, sabinene (12.0–33.9%) and limonene (7.8–23.4%) were the main components, the sabinene level being minimum in full flowering and maximum in fruiting. In stem oils, sabinene (4.7–21.6%) and 2,3,4-trimethylbenzaldehyde (9.3–13.6%) were the main components, the sabinene level being minimum in pre-flowering and maximum in full flowering. In umbel ray oils, sabinene (20.7–43.1%) was the first component in all the phenological periods, followed by α-pinene (7.3–28.2%). Both monoterpenes increased their levels in late flowering and reached minimum amounts in fruiting. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699124#.UaNleNgYrOk [article] Seasonal variation of leaf, stem and umbel ray essential oils of bupleurum gibraltarium lam. [texte imprimé] / Ana M. Fernández-Ocaña, Auteur ; Carlos Fernández-Lôpez, Auteur ; Ana M. Camacho-Simarro, Auteur . - 2006 . - pp. 396-401. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 18 N° 4 (Juillet-Août 2006) . - pp. 396-401 Mots-clés : Bupleurum  gibraltarium  Apiaceae  Essential  oil  composition  Seasonal  variation  Sabinene  α-pinene  Limonene  2,3,4-trimethylbenzaldehyde Résumé : The yield and composition of essential oils from leaves, stems, umbel rays and also from whole aerial parts of Bupleurum gibraltarium Lam. (Apiaceae) were determined during the pre-flowering, full flowering, late flowering, and fruiting vegetative periods. A fruit sample was also studied for comparative purposes. Leaves (0.8–1.8% yield) and stems (0.3–0.7%) reached their maximum oil content during the late flowering period, whereas umbel rays (2.2–3.7%) reached it in full flowering. Oil samples were analyzed by capillary GC and GC/MS: components which were found in amounts greater than 2% were selected to carry out a seasonal study. In the leaf oils, sabinene (12.0–33.9%) and limonene (7.8–23.4%) were the main components, the sabinene level being minimum in full flowering and maximum in fruiting. In stem oils, sabinene (4.7–21.6%) and 2,3,4-trimethylbenzaldehyde (9.3–13.6%) were the main components, the sabinene level being minimum in pre-flowering and maximum in full flowering. In umbel ray oils, sabinene (20.7–43.1%) was the first component in all the phenological periods, followed by α-pinene (7.3–28.2%). Both monoterpenes increased their levels in late flowering and reached minimum amounts in fruiting. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699124#.UaNleNgYrOk