
En la actiualidad las plantas continúan proporcionando moléculas bioactivas utilizadas como alternativas para eldesarrollo de nuevos fármacos. La especie Pluchea carolinensis (Asteraceae) conocida como salvia de playa es utilizadacomo planta ornamental en algunas localidades del Caribe. Los estudios fitoquímicos reportan la presencia desesquiterpenoides, lignanos, triterpenoides y flavonoides. Por su parte, el aceite esencial contiene principalmente 3tujopsanona,ß-cariofileno, espatulenol y ß-chamigreno. Las diferentes partes de la planta son utilizadas en lamedicina tradicional para el tratamiento de dolores de cabeza, fiebres, afecciones estomacales, entre otras. El presenteestudio tiene como objetivo determinar la composición química del aceite esencial de la especie P. carolinensis (Jacq.) G.Don. colectada en la población de Michelena en el estado Táchira y evaluar su actividad frente a cepas de referenciainternacional. El análisis por cromatografía de gases acoplado a espectrometría de masas del aceite esencial de la especieen estudio reveló como compuestos mayoritarios α-pineno (31,94%), timol (13,60%), biciclogermacreno (12,64%) y 2,5dimetoxi-p-cimeno (11,10%). Los resultados del ensayo para la actividad antibacteriana realizados por el método dedifusión en agar con discos, mostraron actividad frente a Staphylococcus aureus ATCC 25923 a la ConcentraciónInhibitoria Mínima (CIM) de 300 µL/mL y Enterococcus faecalis ATCC 29212 a 500 µL/mL.
Currently, plants continue to provide bioactive molecules used as alternative for the development of new drugs. Plucheacarolinensis (Asteraceae) species known as beach sage is used as ornamental plant in some Caribbean locations.Phytochemical studies have reported the presence of sesquiterpenes, lignans, triterpenes and flavonoids. In this regard, theessential oil contains mainly 3-thujopsanone, ß-caryophyllene, spathulenol and ß-chamigrene. Different parts of the plantare used in traditional medicine for the treatment of headache, fiber, stomach conditions, among others. Present study aimsto determine the chemical composition of essential oil of P. carolinensis (Jacq.) G. Don collected from Michelena, TachiraState and to evaluate its activity against international reference bacterial strains. Gas chromatography coupled to massspectrometry assay of the essential oil of the species under study revealed α-pinene (31.94%), thymol (13.60%),bicyclogermacrene (12.64%) and 2,5-dimethoxy-p-cymene (11.10%) as main components. Antibacterial activity assaycarried out by agar disk diffusion method showed activity against Staphylococcus aureus ATCC 25923 at minimuminhibitory concentration (MIC) of 300 µL/mL and Enterococcus faecalis ATCC 29212 at 500 µL/mL.
antibacterial activity, sesquiterpenes, Pluchea carolinensis, Asteraceae, essential oil
antibacterial activity, sesquiterpenes, Pluchea carolinensis, Asteraceae, essential oil
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