RESUMO
The present study describes the antimicrobial activity and chemical composition of Scorzonera sandrasica Hartvig et Strid (Family Asteraceae), endemic to Turkey. The antimicrobial activity of the hexane, chloroform, ethyl acetate, and ethanol extracts of the aerial parts of S. sandrasica was evaluated against microorganisms, including multiresistant bacteria, using a paper disc diffusion method. The chemical composition of the chloroform extract of the plant was determined by gas chromatography and gas chromatography-mass spectrometry. The major compounds of the chloroform extract of the plant were caryophyllene oxide (19.7%), manoyl oxide (16.5%), and manool (11.3%), respectively. The extracts had antibacterial activity; however, no antifungal activity was observed against the two fungi. In particular, the ethanol and chloroform extracts exhibited significant activity against multiresistant strains of Stenotrophomonas maltophilia.
Assuntos
Antibacterianos/farmacologia , Bactérias/efeitos dos fármacos , Farmacorresistência Bacteriana Múltipla , Extratos Vegetais/farmacologia , Scorzonera/química , Antibacterianos/análise , Antibacterianos/isolamento & purificação , Testes de Sensibilidade a Antimicrobianos por Disco-Difusão , Extratos Vegetais/análise , Extratos Vegetais/isolamento & purificaçãoRESUMO
Hexane, chloroform, ethyl acetate and ethanolic extracts of the aerial parts of Centaurea austro-anatolica Hub.-Mor. (Asteraceae) were evaluated against microorganisms, including multiresistant bacteria, using a paper disc diffusion method. The chloroform extract exhibited significant antibacterial activity toward all bacteria tested. The chemical composition of the chloroform extract was determined by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). The major compounds of the extract were caryophyllene oxide (21.32 %), spathulenol (10.86 %), n-tricosanol (9.58 %) and geranyl isovalerate (8.71 %).
Assuntos
Farmacorresistência Bacteriana Múltipla/efeitos dos fármacos , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Antibacterianos/química , Antibacterianos/farmacologia , Centaurea/química , Clorofórmio/química , Testes de Sensibilidade a Antimicrobianos por Disco-Difusão , Componentes Aéreos da Planta/químicaRESUMO
The antimicrobial activity of the n-hexane, chloroform, ethyl acetate and ethanol extracts of the aerial parts of C. drabifolia S.M. subsp. cappadocica (DC.) Wagenitz (Asteraceae) was evaluated against microorganisms including multi-antibiotic resistant bacteria using the paper disc diffusion method. The chemical composition of the chloroform extract of this plant was determined by gas chromatography and gas chromatography-mass spectrometry. The chloroform extract exhibited significant antibacterial activity against all the bacteria tested, except Stenotrophomonas maltophilia MU63. The major compounds of the chloroform extract were spathulenol (14.1%), caryophyllene oxide (12.5%), octadecanol (10.2%), ethyl palmitate (7.7%), [Z,Z]-10,12-hexadecadienal (6.0%), 3-hydroxy p-anisaldehyde (5.9%) and pentacosane (5.8%).
Assuntos
Antibacterianos/isolamento & purificação , Bactérias/efeitos dos fármacos , Centaurea/química , Extratos Vegetais/farmacologia , Terpenos/isolamento & purificação , Antibacterianos/química , Antibacterianos/farmacologia , Bactérias/crescimento & desenvolvimento , Farmacorresistência Bacteriana Múltipla , Cromatografia Gasosa-Espectrometria de Massas , Imunodifusão , Componentes Aéreos da Planta/química , Extratos Vegetais/química , Terpenos/química , Terpenos/farmacologiaRESUMO
The antimicrobial activity of hexane, chloroform, ethyl acetate and ethanol extracts of the aerial parts of S. sandrasicus P.H.Davis (Asteraceae), endemic to Sandras mountain (Turkey), were determined. The antimicrobial activity of the extracts on microorganisms including multi-resistant staphylococci were evaluated using the disc diffusion method. The strains of multi-resistant staphylococci and the other standart bacteria were inhibited by some extracts. The volatile organic compouds of S. sandrasicus was determined by Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS). The major compounds of hexane extract were aromadendrene oxide 2 (13.3%), spathulenol (12.5%) and beta-caryophylene (11.8%), respectively.