Abstract

REYES ESTEBANEZ, Manuela; HEREDIA ABARCA, Gabriela  and  GAMBOA ANGULO, María Marcela. Biological profile of anamorfic fungi from southeast Mexico. Rev. Mex. Mic [online]. 2008, vol.28, n.spe, pp.49-56. ISSN 0187-3180.

Leaf litter fungi Beltraniella japonica, B. portoricensis, Beltraniopsis sp., Gliomastix murorum and MR45 were cultured in two liquid mediums, Czapeck-Dox-yeast extract (CDY) and potato dextrose broth (PDB). In each case, mycelium was separated from the broth filter, and both were macerated with EtAcO, producing filtrate fungal extracts (FFE) and mycelium extract (MFE). These were evaluated by the reduction of radical 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay, and by microdilution antimicrobial test against four pathogenic microorganisms. The results showed high ability to DPPH reduction in FFE of B. japonica, G. murorum, and MR45 in PDB and CDY. The highest antimicrobial activity was detected against S. aureus produced by both Beltraniella strains (200 µg) in PDB and against E. carotovora by MFE of B. japonica in CDY. In both mediums, this strain produced mellein, no other metabolite was identified from the active extracts. The biological profile and initial chromatographic explorations of the active extracts confirm metabolic diversity in our tropical fungi, which could be utilized to improve the production of metabolites useful in pharmacy and agriculture.

Keywords : Antimicrobial; antioxidants; tropical fungi; mellein.

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