Seasonal Variation of Leaf, Stem and Umbel Ray Essential Oils ofBupleurum gibraltariumLam

Autor: M. C. García-Vallejo, María José Pérez-Alonso, Carlos Fernández-López, Jesús Palá-Paúl, Joaquín Altarejos, Ana Fernández-Ocaña, Arturo Velasco-Negueruela, Ana M. Camacho-Simarro
Rok vydání: 2006
Předmět:
Zdroj: Repositorio de Resultados de Investigación del INIA
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria INIA
INIA: Repositorio de Resultados de Investigación del INIA
ISSN: 2163-8152
1041-2905
DOI: 10.1080/10412905.2006.9699124
Popis: 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. © 2006, Taylor & Francis Group, LLC. All rights reserved.
Databáze: OpenAIRE