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. 2018 Mar 28;46(1):79-83.
doi: 10.1080/12298093.2018.1454006. eCollection 2018.

Laccase Activity and Azo Dye Decolorization Potential of Podoscypha elegans

Satadru Pramanik  1 , Sujata Chaudhuri  1
Affiliations

Laccase Activity and Azo Dye Decolorization Potential of Podoscypha elegans

Satadru Pramanik et al. Mycobiology. .

Abstract

Azo dyes containing effluents from different industries pose threats to the environment. Though there are physico-chemical methods to treat such effluents, bioremediation is considered to be the best eco-compatible technique. In this communication, we discuss the decolorization potentiality of five azo dyes by Podoscypha elegans (G. Mey.) Pat., a macro-fungus, found growing on the leaf-litter layer of Bethuadahari Wildlife Sanctuary in West Bengal, India. The fungus exhibited high laccase and very low manganese peroxidase activities under different culture conditions. Decolorization of five high-molecular weight azo dyes, viz., Orange G, Congo Red, Direct Blue 15, Rose Bengal and Direct Yellow 27 by the fungus was found to be positive in all cases. Maximum and minimum mean decolorization percentages were recorded in Rose Bengal (70.41%) and Direct Blue 15 (24.8%), respectively. This is the first record of lignolytic study and dye decolorization by P. elegans.

Keywords: Azo dye; Podoscypha elegans; bioremediation; laccase; litter decomposing fungi.

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Figures

Figure 1.
Figure 1.
Enzyme activity and fungal growth of P. elegans in different media compositions.
Figure 2.
Figure 2.
Laccase and MnP activities in HNHC medium at different days of incubation.
Figure 3.
Figure 3.
Effect of different parameters on laccase activity in HNHC medium. (A) pH. (B) Temperature. (C) Rotation speed. (D) VA concentrations.
Figure 4.
Figure 4.
Decolorization percentage of different dyes over 28 days.
See this image and copyright information in PMC

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