Ligninolytic enzyme production in selected sub-tropical white rot fungi under different culture conditions

Modification of wheat straw lignin by solid state fermentation with white-rot fungi

“…This capability to degrade lignin begins during the colonization of the substrate by the fungi and the easily digestible carbohydrates are converted into simpler sugars, a process known as fungus primary metabolism. The sugars are totally consumed by the fungus and then begins the secondary metabolism, which consists of the breakdown of structural carbohydrates and lignin from substrates by the extracellular enzymes (Moyson and Verachtert, 1991;Karunanandaa et al, 1995;Cohen et al, 2002;Valdez et al 2008) composed of lignin peroxidases, laccases and manganese dependent peroxidases (Tekere et al, 2001;Martinez et al, 2002).…”

“…Laccase and MnP are considered to be the most common ligninolytic enzymes within white-rot fungi (Nerud et al, 1996). In several studies with different white-rot fungi strains activities of MnP and laccase are predominant (Vyas et al 1994;Vares et al 1995;Hofrichter et al 1999;Tekere et al 2001;Arora et al 2002) and our results also show a general predominance on the activity of these two enzymes. Our data also show that MnP activity is much higher than that of laccase.…”

“…Production of LiP was only observed for B. adusta with a general increase along the incubation time. While LiP is not always detected (Tekere et al, 2001), Arora et al (2002) and Vyas et al (1994) detected LiP for P. chrysosporium and T. versicolor in SSF wheat straw mediums. One possible explanation for this may reside on the deficiency of identification of LiP activity when using the veratryl alcohol oxidation Modification of wheat straw lignin by solid state fermentation with white-rot fungi 31 assay (Arora et al 2002) due to the presence of inhibitors or colour interference by aromatic compounds (Hofrichter et al 1999).…”

Lignolytic enzymes produced by Trametes villosa ccb176 under different culture conditions

“…In general, the pH optimum for the growth of basidiomycetous fungi is close to 4.5 (8,14). The association between acidification of the culture medium during the growth of basidiomycetes and the production of organic acids, as well as the increase in pH after glucose depletion, are well documented in the literature (6,8,27).…”

Characterization of the Oxidative Enzyme Potential in Wild White Rot Fungi From Misiones (Argentina)

“…These particular features make them interesting to be used in "tailor made processes". On the other hand, there is some evidence that same species from different habitats may show different genomic and proteomic features that may be exploited for relevant biotechnological applications (Tekere et al, 2001b;Fonseca et al, 2010).…”