Variation of the essential oil content and composition in leaves from cultivated plants of Hypericum androsaemum L.

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

Guedes, AP (Autor) Outra; Amorim, LR (Autor) Outra; Vicente, A (Autor) Outra; Fernandes Ferreira, M (Autor) Outra

Revista

Título: Phytochemical Analysis

Vol. 15

Páginas: 146-151

ISSN: 0958-0344

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 18 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-000-APR

DOI: 10.1002/pca.758

Abstract (EN): The amount and composition of the essential oil from leaves of Hypericum androsaemum L. cultivated in Arouca (Portugal) were determined in six samples harvested during 1 year at intervals of 2 months. The seasonally dependent essential oil content ranged from 0.7 mg/g biomass dry weight in September to 3.4 mg/g in February. The oil contained more than 80 compounds, 70 of which (constituting 88-93% of the total oil) were identified by GC and GC-MS. An approximation of the absolute quantification of each compound and compound class was performed using a GC method with an internal standard. The relative and the absolute content of each compound and compound class changed during the year. At the end of the winter and in the spring, the essential oil was dominated by sesquiterpene hydrocarbons and accumulated a high number of intermediate to long chain n-alkanes and 1-alkenes. In September, the essential oil contained the lowest levels of sesquiterpene hydrocarbons (43%) and the highest levels of 1-octene and 2-hexenal (38%). In February, the essential oil had the highest level of sesquiterpene hydrocarbons (73%) and the highest diversity of intermediate to long chain n-alkanes and 1-alkenes. Copyright (C) 2004 John Wiley Sons, Ltd.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6