Hypsizigus marmoreus – a novel potent degrader of lignocellulose residues

Abstract

Hypsizygus marmoreus is an edible and medicinal commercially cultivated mushroom, whose ligninolytic potential is still insufficiently known. Therefore, the goals of this study were to profile its Mn-oxidizing peroxidases and laccases activity and its potential to depolymerize common agro-forestry residues. Raspberry and blackberry sawdust induced the production of highly active laccases (26006.83 U L-1 and 17576.79 U L-1, respectively), while the activity peaks of Mn-dependent peroxidase (134.47 U L-1) and Mn-independent bperoxidase (184.40 U L-1) were recorded on plum sawdust and wheat straw, respectively. The pretreatment of corn stalks resulted in the highest lignin removal (57.15%), while the highest lignin/cellulose removal ratio (selectivity) was noted on oak sawdust (17.69). The maximal (20%) and the minimal (8.30%) dry matter loss were obtained for corn stalks and oak sawdust, respectively. The presented results showed the exceptional potential of the ligninolytic system of H. marmoreus HAI 605 and the possibility of its application in numerous biotechnological processes.