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Revista de Biología Tropical

On-line version ISSN 0034-7744Print version ISSN 0034-7744


CASTILLO-MACHALSKIS, Isabel; D'ARMAS, Haydelba; MALAVER, Nora  and  NUNEZ, Maximiano. Actividad antibacteriana de extractos de hongos aislados de raíces del mangle Rhizophora mangle (Rhizophoraceae) en Venezuela. Rev. biol. trop [online]. 2007, vol.55, n.3-4, pp.761-765. ISSN 0034-7744.

Anti-bacterial activity of extracts from fungi collected from mangrove Rhizophora mangle (Rhizophoraceae) roots in Venezuela. The antibacterial activity of marine fungi extracts was evaluated by a test of efficiency. The fungi were previously inoculated in Malt Agar (EMA) extract with 50 % of seawater and growth for 60 days. Triplicate antibiograms were carried out with the extracts. An ANOVA I with a posteriori Duncan test were applied to the diameters of inhibition zones. The extracts of Aspergillus ochraceus 3MCMC3 and Penicillium citrinum (14) 4MCMC16 present wide spectral antibacterial properties, inhibiting 100 % and 80 % of the developing germs, especially Pseudomonas aeruginosa 9027. The extract of Penicillium (1) 3MLLC5 had the highest efficiency on this strain; P. aeruginosa 9027 and Escherichia coli 10536 were the most sensitive germs when treated with these extracts. These marine fungi can be an important source of antibacterial secondary metabolites. Rev. Biol. Trop. 55 (3-4): 761-765. Epub 2007 December, 28.

Keywords : antibacterial activity; marine fungi; mangrove roots; Rhizophora mangrove; Tacarigua Lagoon; Venezuela.

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