Decolorization of azo dyes by Pycnoporus sanguineus and Trametes membranacea

In the present work, decolorization of dyes Orange II and Black V by the fungi Pycnoporus sanguineus and Trametes membranacea was assessed at six, 12 and 18 days, through fractional design, with a total of 16 trials, statistically represented by 26-2. The fungi were grown in Erlenmeyer flasks containing the malt and King media supplemented with 0.05% m/v of the dyes Orange II and Black V, respectively under pH 4.5 and 5.0 in the presence or absence of agitation and/or luminosity. The fungal species showed different behaviors on the biomass production and decolorization of the dyes under different growing conditions. P. sanguineus showed the highest production of biomass (7.5 g/l) when grown on King medium supplemented with dye Black V, under the absence or presence of agitation, luminosity and at pH 4.5 and 5.0, while T. membranacea showed a 7.5 g/l of biomass in all growing conditions for the two dyes tested. As for the agitation of the flasks, the rotation speed of 130 rpm was the best condition for color removal. The fungi studied reached a decolorization percentage of over 50% for the dyes in all flasks under agitation.Keywords: Basidiomycetes, white rot fungi, azo dyes, decolorization

Contribution to the knowledge of polypores (Agaricomycetes) from the Atlantic forest and Caatinga, with new records from Brazil

The Atlantic Forest is the better known Brazilian biome regarding polypore diversity. Nonetheless, species are still being added to its mycota and it is possible that the knowledge of its whole diversity is far from being achieved. On the other hand Caatinga is one of the lesser known. However, studies in this biome have been undertaken and the knowledge about it increasing. Based in recent surveys in Atlantic Forest and Caatinga remnants in the Brazilian States of Bahia, Pernambuco and Sergipe, and revision of herbaria, twenty polypore species previously unknown for these states were found. Fuscoporia chrysea and Inonotus pseudoglomeratus are new records to Brazil and nine are new to the Northeast Region. Furthermore, four species previously known from Brazil were found for the first time in the Atlantic Forest, viz. Flabellophora parva, F. chrysea, I. pseudoglomeratus and Trametes lactinea, and three in the Caatinga, viz. I. portoricensis, Phylloporia spathulata and Schizopora flavipora. Keys to the main taxa are provided