Composição e atividade antibacteriana dos óleos essenciais de Senecio crassiflorus var. crassiflorus

Abstract

Recebido em 20/4/07; aceito em 3/12/07; publicado na web em 24/7/08 COMPOSITION AND ANTIBACTERIAL ACTIVITY OF THE ESSENTIAL OILS OF Senecio crassiflorus var. crassiflorus. The essential oils of leaves, aerial and underground stems of Senecio crassiflorus var. crassiflorus were extracted by hydrodistillation and their analyses were performed by GC/MS. Qualitative and quantitative differences have been found between the analyzed parts. The main compounds of the essentials oils of the leaves were found to be oxygenated sesquiterpenes, while the oils from the aerial and underground stems showed sesquiterpene hydrocarbons as major constituents. Furthermore, the essential oils were tested against Staphylocccus aureus, Escherichia coli, Pseudomonas aeruginosa and Bacillus cereus. The essential oil of the leaves was shown to be the most active.

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

“…Fourteen compounds were unique to A. arenaria and among them, the sesquiterpene carotol, which exhibits antifungal activity (JasickaMisiaka et al 2004). For A. robusta, ten compounds were exclusive, and germacrene D, one of the major sesquiterpenes in the EOs from this species, exhibits antimicrobial activity (Murari et al 2008). Exclusive compounds, as presented here for A. arenaria and A. robusta, along with the common compounds to each species, provide a characteristic chemical profile that can help in solving taxonomic problems among Aldama species (Bombo et al 2012(Bombo et al , 2014.…”

“…(=Cordia verbenacea DC) (Boraginaceae) have demonstrated anti-inflammatory properties of (-)-trans-caryophyllene and α-humulene . The α-humulene may also possess cytotoxic and insecticide activities (Murari et al 2008). Furthermore, α-pinene, β-pinene, and δ-3-carene, which were present in flowering and dormant stages for both species, have been indicated in phytochemical studies as possessing antimicrobial activity (Lorenzetti et al 1991, Leite et al 2007.…”

“…Thus, the biosynthesis, composition, and yield of EOs may be influenced by biotic or abiotic environmental factors (Marotti et al 1996, Sangwan et al 2001, Deschamps et al 2008. In this context, the chemical composition and yield of EOs may differ between organs from the same plant and between different phenological phases of a plant's development (Deschamps et al 2008, Murari et al 2008.…”

Influence of seasonality on the yield and composition of the essential oil of Siparuna guianensis Aublet

“…Germacrene D is a hydrocarbon sesquiterpene that has antibacterial activity (Murari et al, 2008) and is studied as a precursor in the biosynthesis of sesquiterpenes (Bulow et al, 2000). The metabolite ɣ-elemene is a sesquiterpene hydrocarbon that has antitumor activity notable for being efficient against several types of cancer (Costa et al, 2010).…”

Perfil fenotípico e susceptibilidade antimicrobiana de Streptococcus equi isolados de equinos da região Sul do Brasil

“…Após o período de incubação, a CIM foi determinada como a menor concentração que inibiu efetivamente o crescimento bacteriano nos poços de microdiluição. Para esta determinação foi adicionado 20μL de solução a 1% do corante cloreto de 2,3,5-trifenil tetrazólio (Vetec ® ), em cada poço da microplaca, a fim de auxiliar na revelação da CIM (Murari et al 2008). De acordo com os padrões, para estreptococos betahemolítico (CLSI 2009), os isolados com valores de CIM <0,12μg/ mL foram considerados sensíveis à penicilina.…”