Laccase production by Pleurotus djamor in agar media and during cultivation on wheat straw
DOI:
https://doi.org/10.33885/sf.2015.3.1143Keywords:
mushroom cultivation, enzymes, biomass, mycelial growthAbstract
Laccase production in vitro and mycelial growth were measured for seventy one Pleurotus djamor strains cultivated on malt extract
agar (MEA) or yeast malt extract agar (YMEA) supplemented with water soluble lignin derivatives (WSLD). In vitro laccase production
and mycelial diameters averages were higher in the YMEA-WSLD cultures than MEA cultures. The four strains with the highest enzyme
production in vitro were selected to measure their laccase activity pattern during the culture cycle, using wheat straw as substrate. Laccase
activity was detected on second day of incubation. The first peak of activity (169.8-579.8 μMol g-1 min-1) was reached on day 4,
and the second peak of activity was observed during the initiation and development of fruiting bodies, with values from 164.4 to 469.9
μMol g-1 min-1 measured. These results suggest that a laccase system in P. djamor is associated with the reproductive stage. Furthermore,
high laccase production observed in these strains evidences that P. djamor may be an interesting species for use in some biotechnological
processes
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