Seasonal variation of the essential oil from two Brazilian native Aldama La Llave (Asteraceae) species

Abstract

Aldama arenaria and A. robusta are morphologically similar aromatic species that have seasonal development. The yield and chemical composition of essential oils from aerial and underground vegetative organs of these species were compared to verify the production of volatile metabolites in flowering and dormant phases of development and to identify if there are unique compounds for either species. The major compound in the essential oils from A. arenaria leaves was palustrol (16.22%) and for aerial stems was limonene (15.3%), whereas limonene (11.16%) and α-pinene (19.64%) were the major compounds for leaves and aerial stems from A. robusta, respectively. The major compound for the underground organs was α-pinene, in both species and phenological stages. High amounts of diterpenes were found especially for A. arenaria essential oils. Each analyzed species presented unique compounds, which can provide a characteristic chemical profile for both species helping to solve their taxonomic problems. This study characterized for the first time the yield and essential oil composition of A. arenaria and A. robusta, which have medicinal potential, and some of the compounds in their essential oils are unique to each one and may be useful in helping the correct identification of them.

Seasonal variability in essential oil composition and biological activity of Rosmarinus officinalis L. accessions in the western Himalaya

“…The quantitative differences detected in 1,8-cineole, and camphor content in the present study are mainly dependent on seasonal harvesting. The chemical composition of the plants gets influenced by the accumulation of a few compounds at a particular period of the season in response to environmental conditions and seasons 37 – 39 . The concentration of major EO compound (1,8-cineole) was recorded to be highest among seasons, while other EO constituents amount differed randomly during the plant life cycle.…”

Estudio de la variación de la composición química del aceite esencial de las partes aéreas de Nasa ranunculifolia (Kunth)

“…Los aceites esenciales fueron obtenidos de las partes aéreas por hidrodestilación de 4 horas con aparato tipo Clevenger (Farmacopea), el aceite esencial fue extraído con éter de petróleo (EP) y secado con sulfato de sodio anhidro, el EP fue evaporado a temperatura ambiente y el aceite fue pesado para determinar su rendimiento y guardado en congeladora (-20 ºC) hasta su análisis por cromatografía gaseosa acoplada a espectrometría de masas (CG-EM) 4 .…”

CONTRIBUCIÓN AL ESTUDIO FITOQUÍMICO DEL ZUMO DE Colignonia parviflora SUBSP. BIUMBELLATA (SAQTA)

“…Fueron adquiridos 2,547 kg de raíz fresca, la cual fue separada en dos partes, una parte (850 g) para la obtención del aceite esencial y la diferencia (1,697 kg) fue sometida a extracción del zumo (970 mL) (figura 2) en un extractor de jugos eléctrico doméstico de la marca OSTER, obteniéndose 727 g de bagazo de la raíz. Obtención del aceite esencial.-Las raíces (850g) fueron sometidas a extracción del aceite esencial por hidrodestilación con aparato de Clevenger 7 , el aceite esencial fue extraído con éter de petróleo y secado con sulfato de sodio anhidro para posteriormente ser analizado por cromatografía gaseosa acoplada a espectrómetro de masas (CG-EM) 8 .…”