NDLI: Decolorization of Victoria blue by the white rot fungus, Phanerochaete chrysosporium

Content Provider	Springer Nature Link
Author	Gomaa, Ola M. Linz, John E. Reddy, C. A.
Copyright Year	2008
Abstract	Synthetic textile dyes are among the most dangerous chemical pollutants released in industrial wastewater streams. Recognizing the importance of reducing the environmental impact of these dyes, the ability of the white rot fungus Phanerochaete chrysosporium to decolorize various textile dyes was investigated. This fungus decolorized 6 of the 14 structurally diverse dyes with varying efficiency (between 14% and 52%). There was no discernable pattern of decolorization even among dyes of the same chemical class, suggesting that attack on the dyes is relatively non-specific. Among the three dyes which showed >40% decolorization, Victoria Blue B (VB) was chosen for further analysis because the ability of the fungus to decolorize VB was nearly independent over a relatively broad concentration range. Blocking lignin peroxidase (LiP) and manganese peroxidase (MnP) production by the fungus did not substantially affect VB decolorization. Inhibition of laccase production by adding various inhibitors to shaken cultures reduced VB decolorization significantly suggesting a role for laccase in VB decolorization. When sodium azide and aminotriazole were used to inhibit endogenous catalase and cytochrome P-450 oxygenase activities, there was 100% and 70% reduction in VB decolorization, respectively. Adding benzoate to trap hydrogen peroxide-derived hydroxyl radicals resulted in 50% decolorization of VB. Boiling the extracellular fluid (ECF) for 30 min resulted in approximately 50% reduction in VB decolorization. Collectively, these data suggest that laccase, and/or oxygenase/oxidase and a heat-stable non-enzymatic factor, but not Lip and MnP, play a role in VB decolorization by P. chrysosporium.
Starting Page	2349
Ending Page	2356
Page Count	8
File Format	PDF
ISSN	09593993
Journal	World Journal of Microbiology and Biotechnology
Volume Number	24
Issue Number	10
e-ISSN	15730972
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-04-26
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phanerochaete chrysosporium Victoria blue B Decolorization Biomimicking Microbiology Environmental Engineering/Biotechnology Biochemistry Biotechnology Applied Microbiology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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