Abstract

LIBERTO, Romina  and  SAPARRAT, Mario C. N.. Growth and potential decolorizing ability of Hyphomycetes (Deuteromycetes) from Río Santiago on agar medium supplemented with synthetic chromophores. Bol. Soc. Argent. Bot. [online]. 2005, vol.40, n.3-4, pp.145-150. ISSN 1851-2372.

The ability of Dictyosporium triramosum, Minimidochium parvum and Tetraploa aristata, isolated from organic matter collected in Río Santiago (Buenos Aires Province, Argentina), to grow and decolorize agar media supplemented with different synthetic chromophores at 0.01% (w v^-1) was analyzed. Crystal violet and brilliant green reduced the growth of the three strains showing the highest inhibition percentages. While eosin and rose bengal did not affect D. triramosum, growth inhibition values superior to 50 % were observed for M. parvum and T. aristata. Congo red and neutral red inhibited growth of both D. triramosum and M. parvum in a 12-17%, but those dyes did not reduced T. aristata growth. D. triramosum and T. aristata were not affected by the toluidine blue dye, while M. parvum was inhibited by that chromophore. Methyl red only inhibited to M. parvum and T. aristata. The 3 strains tested revealed ability to decolorize the medium supplemented with methyl red and toluidine blue. D. triramosum decolorized also the medium with congo red and crystal violet, and T. aristata produced also the decolorization of the agar medium with crystal violet and neutral red. None of the fungi studied decolorized the media with brilliant green, eosin and rose bengal.

Keywords : Growth; Decolorization; Inhibition; Hyphomycetes; Synthetic chromophores.

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