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Revista Brasileira de Farmacognosia
versión On-line ISSN 1981-528X
BARATTO, Leopoldo et al. Investigation of the allelopathic and antimicrobial activities of Mikania laevigata (Asteraceae) obtained in hydroponic and traditional cultivars. Rev. bras. farmacogn. [online]. 2008, vol.18, n.4, pp. 577-582. ISSN 1981-528X. http://dx.doi.org/10.1590/S0102-695X2008000400014.
The ethanolic extract of "guaco" (Mikania laevigata) traditionally cultivated in the soil or in a hydroponic system were tested for allelopathic and antimicrobial activities. Allelopathic activity was evaluated by the inhibition of germination assay using lettuce seeds, and antimicrobial activity by the disc diffusion assay. A notable allelopathic effect was observed for both extracts, although a more expressive activity of traditional "guaco" was verified, since the inhibition of seeds germination was 100% even in the lower concentration. None ethanolic extract of "guaco" presented significant antimicrobial activity against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Enterococcus faecalis and Enterococcus faecium.
Palabras clave : Mikania laevigata; Allelopathy; Antimicrobial activity; Hydroponics; Traditional cultivation.