Ganoderma lucidum and G. tsugae – a well-known lignin degrading species as transformators of insufficiently utilized lignocellulosic waste

Abstract

"The present study aimed to determine the capacity of Ganoderma lucidum and G. tsugae for pretreatment of common agroforestry residues. G. lucidum dominated in Mn-dependent peroxidase activity (1625.00 U L-1) after corn stalks fermentation, while the peak of Mn-independent peroxidase activity (2458.33 U L-1) was detected on raspberry sawdust fermented by G. tsugae. Laccases were dominant in the ligninolytic cocktail, with the maximal activity of 42480.09 U L-1 synthetized by G. lucidum cultivated on plum sawdust. The reduction of the lignocellulosic dry matter ranged between 11.00% and 33.00% in oak sawdust and wheat straw, respectively, fermented by G. tsugae, while the highest extent of lignin, cellulose and hemicellulose consumption (54.78%, 40.30% and 54.91%, respectively) was obtained on corn stalks. On the other hand, the smallest cellulose removal (6.26%) was detected after raspberry sawdust fermentation by G. lucidum, which, besides moderate ligninolysis, induced the highest selectivity index (2.87). The obtained differences in enzyme activities and lignocellulosics degradation extent could be the consequence of the different composition of the studied residues, especially macro- and microelements content. The obtained results clearly indicated the huge potential of G. lucidum and G. tsugae enzyme cocktails for the transformation of lignocellulosic residues that present abundant sources of numerous value-added products."