“Green” approach in utilization of common agroforestry residues by Laetiporus sulphureus enzymes’ cocktail
2021
Galić, Milica M. | Stajić, Mirjana M. | Ćilerdžić, Jasmina Lj
Laetiporus sulphureus BEOFB 1040 has shown the capacity to produce ligninolytic enzymes and consequently degrade eight common agroforestry residues. The highest activities of Mn-dependent and Mn-independent peroxidases (2079.55 U/L and 492.42 U/L, respectively) were detected after treatment of plum and oak sawdust, while laccases synthesis was inhibited by all tested residues. However, despite laccase absence this brown-rot species was not only a good depolymerizer of cellulose and hemicellulose but also an effective delignifier of selected residues. The highest level of lignin content reduction of 43.09% along with high degradation of holocellulose (35.24% of cellulose and 38.42% of hemicellulose) was noted in raspberry sawdust. On the other hand, a selectivity index of even 4.55 was achieved on wheat straw where only 20.27% of lignin was degraded. Consequently, the highest and the lowest dry matter loss (21.25% and 5.83%) were noted on raspberry sawdust and wheat straw, respectively. These results indicate that L. sulphureus BEOFB 1040 is a mushroom with a strong potential for different biotechnological applications and certainly deserves further studies.
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