Growth, dye degradation and ligninolytic activity studies on Zimbabwean white rot fungi

Tekere, Memory; Mswaka, Allen Y.; Zvauya, R.; Read, John S.

doi:10.1016/s0141-0229(00)00343-4

Cited by 111 publications

(78 citation statements)

References 18 publications

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“…3). The optimum pH for the decolorization of the dye Poly R478 ranged from 3 to 5 for Trametes pocas, T. cingulata, Pycnoporus sanguineus and Datronia concentrica (Tekere et al, 2001). The production of organic acid by L. crinitus and P. castanella, which reduces the pH of the culture medium, might have stimulated the decolorization of RBBR.…”

Section: Resultsmentioning

confidence: 99%

“…The role of organic acids in the degradation of aromatic compounds catalyzed by ligninolytic enzymes (peroxidases and laccase) has been well documented in the literature. The organic acid-Mn 3+ complex acts as a strong redox mediator which is able to attack lignin structures, forming unstable free radicals that tend to disintegrate spontaneously (Hofrichter et al, 1999, Tekere et al, 2001Hofrichter, 2002;Makela et al, 2002). The pH of the reaction influenced the activity of ligninolytic enzymes produced by the basidiomycetes and involved in the in vitro decolorization of RBBR.…”

Section: Resultsmentioning

confidence: 99%

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Influence of pH on the growth, laccase activity and RBBR decolorization by tropical basidiomycetes

Neto

Matheus

Machado

2009

Braz. arch. biol. technol.

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The basidiomycete fungi Lentinus crinitus and Psilocybe castanella are being evaluated in a bioremediation process of soils contaminated with organochlorine industrial residues in the Baixada Santista, São Paulo. The aim of the present study was to determine the influence of pH on the fungal growth, in vitro decolorization of anthraquinonic dye Remazol Brilliant Blue R (RBBR) and laccase activity. The pH of the culture medium influenced the growth of L. crinitus and P. castanella, which presented less growth at pH 5.9 and pH 2.7, respectively. The fungi were able to modify the pH of the culture medium, adjusting it to the optimum pH for growth which was close to 4.5. Decolorization of the RBBR was maximal at a pH of 2.5 to 3.5. Higher laccase activity was observed at pH 3.5 and pH 4.5 for L. crinitus and P. castanella, respectively. pH was found to be an important parameter for both the growth of these fungi and the enzymatic system involved in RBBR decolorization.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Influence of pH on the growth, laccase activity and RBBR decolorization by tropical basidiomycetes

Neto

Matheus

Machado

2009

Braz. arch. biol. technol.

View full text Add to dashboard Cite

show abstract

“…Considering LiP positive results on P. chrysosporium strains (Table 1), it would interesting to note that differences on the detection methodology, as well as the influence of culture medium and/or conditions should not be neglected at the time of evaluating LiP production (Zhao et al, 1996;Tekere et al, 2001a;Saparrat et al, 2002;Levin et al, 2004).…”

Section: Enzyme Detection On Solid Mediamentioning

confidence: 99%

“…This potential, mainly based on their strong oxidative activity and low substrate specificity of their ligninolytic enzymes, has been also proposed for the degradation of a variety of persistent environmental pollutants (Tekere et al, 2001a;Levin et al, 2004). As a secondary benefit, promising WRF may be used not only to alleviate environmental deterioration derived from lignocellulosic residue generation, but also to promote its bioconversion to different added-value products (Millati et al, 2011).…”

Section: Introductionmentioning

confidence: 99%