Tagetes erecta L. Uma planta de múltiplos propósitos: antibacteriana, larvicida e antiviral. / Tagetes erecta L. A multipurpose plant: antibacterial, antiviral and larvicidal.

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

11/07/2006

RESUMO

Medicinal plants are worldwide used in traditional medicine although to certify their therapeutic effects many research experiments are needed for a rational based use. This work describes the antimicrobial and larvicidal action against Aedes aegypti of Tagetes erecta L. essential oil of it also reports that the hexane extract from the roots inhibited the dengue virus. The plant was cultivated in the medicinal garden of the Biology Department UECE. The essential oil was extracted by steam distillation from the aerial parts of the plant. The root hexane extract uas obtained by percolation. The essential oil was analyzed by gas chromatography / mass spectrometry and eleven constituents were identified. The main components were piperitone (43%), isopulegyl acetate (7,4%) and myrtenol (7,2%). In the hexane extract the main constituent was identified as α-tertienyl by HPLC analysis and comparison with authentic sample. For the antimicrobial test 16 bacterial strains (enterobacteria) were used, being two standards and fourteen clinical isolates. The methodology used was agar difusion and all bacteria were sensitive to the essential oil. The oil was also efficient against Aedes aegypti larvae and showed 100% mortality at 150 ppm demonstrating similar action to the themephos insecticide. The complete inhibition of DENV-3 virus was obtained with the root hexane extract at 200 ppm. According to these results T. erecta constitutes a new source of bioactive compounds to combat dengue and enterobacteria.

ASSUNTO(S)

tagetes erecta antiviral larvicida antimicrobiana microbiologia tagetes erecta antiviral larvicide antimicrobial

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