FARIÑA Julia Ines
Evidence on manganese peroxidase and tyrosinase expression during decolourization of textile industry dyes by Trichosporon akiyoshidainum
PAJOT H.F.; FARIÑA J.I.; FIGUEROA L.I.C.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
ELSEVIER SCI LTD
Lugar: Amsterdam; Año: 2011 vol. 65 p. 1199 - 1199
Textile dyes are engineered to be resistant to environmental conditions. During the last years the treatment of textile dye effluents has been the focus of significant research because of the potentially low cost of the process. Mechanisms of biological textile dyes decolourization greatly depend on the dye chemical structure and the employed microorganisms. Whilst basidiomycetous filamentous fungi are well recognized for dye decolourization through ligninolytic enzymes, reports on textile dye decolourization mechanisms of basidiomycetous yeasts have been scarce. Decolourization of several textile dyes by Trichosporon akiyoshidainum occurs between the first 12 h of cultivation. This fast decolourization process could not be solely related to siderophores production or dye sorption to biomass and showed to be a co-metabolic process. T. akiyoshidainum could use glucose, sucrose and maltose as alternative carbon sources, and urea as an alternative nitrogen source with similar decolourization rates. Two enzymatic activities, manganese peroxidase and tyrosinase, were evidenced as induced by the presence of dyes in culture media, pointing to their potential role during the decolourization process. Manganese peroxidase titres reached 666 U l-1 to 10538 U l-1 whilst tyrosinase titres ranged between 84 U l-1 and 786 U l-1, depending on the tested dye. The present work provides a useful background to propose new eco-friendly alternatives for the wastewater treatment of textile dying industries.