Cresols utilization by Trametes versicolor and substrate interactions in the mixture with phenol

Biodegradation
Z AlexievaP Zlateva

Abstract

The ability of the white rot fungus Trametes versicolor strain 1 to degrade and utilize methylated phenols (cresols) was established for the first time in a medium not containing any other carbon components. The data obtained demonstrated the better potential of the strain to assimilate p-cresol instead of o- or m- cresol. The 0.5 g/l p-cresol provided was degraded in full after 96 h. The effect of a dual substrate mixture (0.3 g/l phenol + 0.2 g/l p-cresol) on the growth behavior and degradation capacity of the investigated strain was examined. The cell-free supernatants were analyzed by HPLC. It was established that the presence of p-cresol had not prevented complete phenol degradation but had a significant delaying effect on the phenol degradation dynamics. Phenol hydroxylase, catechol 1.2-dioxygenase and cis,cis-muconate cyclase activities were obtained in conditions of single and mixed substrates cultivation. The influence of different phenolic substrates on phenol hydroxylase activity in Trametes versicolor 1 was established. The mathematical models describing the dynamics of single substrates' utilization as well as the mutual influence of phenol and p-cresol in the mixture were developed on the bases of Haldane kinetics...Continue Reading

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Citations

May 17, 2011·Journal of Hazardous Materials·M Concetta TomeiAndrew J Daugulis
May 15, 2020·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Anukool KietkwanbootOramas Suttinun
Oct 31, 2018·NPJ Biofilms and Microbiomes·Peter P SunThanh H Nguyen
Apr 10, 2019·Applied Microbiology and Biotechnology·Daniel P BrinkMarie F Gorwa-Grauslund

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