Comparison of synthetic dye decolorization by whole cells and a laccase enriched extract from Trametes versicolor DSM11269

摘要

Trametes versicolor?strain DSM 11269 was found to decolorize six out of seven different synthetic dyes when grown on dye-containing agar plates. Using a laccase enzyme extract, enriched from the fungal liquid culture supernatant, the?anthraquinone derivative dyes (Alizarin Red S and Remazol Brilliant Blue R) were decolorized in three hours at 50°C by 55 and 70%, respectively. The four azo compounds (Amaranth, Cibacron Brilliant Red 3B-A, Direct Blue 71 and Reactive Black 5), and the indigo molecule (Indigo Carmine), showed a higher resistance to?decolorization (<10% in 6 h),?although of them (Amaranth, Reactive Black 5 and Indigo Carmine) were efficiently decolorized by?T. versicolor?in agar plate assays. This suggests that different oxidizing activities from laccase alone may be involved in the decolorization process.