Effect of copper and manganese ions on activities of laccase and peroxidases in three Pleurotus species grown on agricultural wastes |
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Authors: | Mirjana Staji? Limor Persky Yitzhak Hadar Dana Friesem Sonja Duleti?-Lau?evi? Solomon P Wasser Eviatar Nevo |
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Institution: | (1) Institute of Botany, Faculty of Biology, University of Belgrade, Takovska 43, 11000 Belgrade, Serbia and Montenegro;(2) Department of Plant Pathology and Microbiology, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University, PO Box 12, 76100 Rehovot, Israel;(3) Institute of Evolution, University of Haifa, Mount Carmel, 31905 Haifa, Israel |
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Abstract: | Copper (Cu2+) and manganese (Mn2+) ions influenced laccase (Lac) and peroxidase production in Pleurotus eryngii, Pleurotus ostreatus, and Pleurotus pulmonarius. In P. eryngii, the optimum Cu2+ concentration for Lac production was 1 mM and for peroxidases 10mM, and Mn2+ concentration of 5mM led to peaks of Lac and peroxidase activity. In P. ostreatus HAI 493, the highest level of Lac activity was at Cu2+ concentrations of 1 and 10 mM and Mn2+ concentration of 1mM, respectively. The absence of Cu2+ and Mn2+ caused the highest levels of peroxidase production. In P. ostreatus HAI 494, the highest level of Lac activity was at a Cu2+ concentration of 5 mM and at Mn2+ concentration of 1 mM, respectively. High levels of peroxidase activity were found in the medium without and with 1mM Cu2+, and at 1 and 5 mM Mn2+, respectively. In P. pulmonarius, the highest Lac activity was found in the presence of 5 mM Cu2+ and 5 mM Mn2+, respectively. The absence of Cu2+ and Mn2+ as well as their presence at a concentration of 1 mM led to the peaks of peroxidase activities. |
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Keywords: | Pleurotus eryngii Pleurotus ostreatus Pleurotus pulmonarius laccase peroxidases copper manganese |
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