Agar-plate screening for textile dye decolorisation by white rot fungi Pleurotus species (Pleurotus cornucopiae var.citrinopileatus, P. djamor, P. eryngii, P. ostreatus and P. sajor-caju)

Abstract

A screening test for five different white rot fungal strains (Pleurotus species: Pleurotus cornucopiae var. citrinopileatus, P. djamor, P. eryngii, P. ostreatus and P. sajor-caju) was carried out to assess their decolorisation capacities for five different textile dyestuffs, namely Indanthren yellow F3GC Collosiol (IYFC), Blue CC Dranix (BCCD), Indanthren Blue CLF Collosiol (IB), Remazol Brilliant Blue BB (RB), and Levafix Brilliant Blue E-B (LBB) on agar plates. Full decolorisation was observed only for RB and LBB (dye concentrations <20 mg L-1). Similar to LBB dye, IB was also not decolorized at all dye concentrations above 20 mg L-1, but the original color of the dye was converted into yellow below 20 mg L-1 by all organisms used. None of the organism used in this study was able to fully decolorize IYFC dye, but conversion of original color of the dye into brown was observed for all dye concentrations. In addition, no decolorisation was observed for BCCD at all dye concentrations used. In terms of radial growth, in most cases, low dye concentrations (< 200 mg L-1) were well tolerated by the organisms used, except for some of them, showing either retardation or full inhibition in growth. © by PSP 2007