Trace Elements Influence on Grapevine Degradation by Pleurotus Ostreatus

Abstract

Plant raw materials could be potential sources for fibre production and this biomass could be also transformed in valued food, feed, energy sources (biofuels), and paper pulp in the processes where fungi take the major role. Effectiveness of these processes depends on capacity of the fungal species but also on the presence of trace elements which can also remarkably modulate the enzyme activity and to affect biodegradation processes. Pleurotus ostreatus HAI 493 produced ligninolytic enzymes during solid-state fermentation of grapevine sawdust with significant variability in the activity level depending on presence of Fe, Zn, or Se. Enzyme activities in trace element enriched media showed increasing of laccase activity and decreasing of Mn-oxidising peroxidase activity. The highest enlargement of laccase activity (65.9%) was noted after 10 days of cultivation in the presence of Na2SeO4. The highest inhibitory level of Mn-dependent peroxidase activity (59.6%) was noted in the presence of Na2SeO4.