Lignocellulose degradation by Pleurotus ostreatus in the presence of cadmium |
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Authors: | Baldrian Petr Gabriel Jirí |
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Affiliation: | Laboratory of Biochemistry of the Wood-rotting Fungi, Institute of Microbiology AS CR, Víndeoská 1083, 14220 Prague 4, Czech Republic. baldrian@biomed.cas.cz |
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Abstract: | Activities of cellulolytic and hemicellulolytic enzymes endo-1,4-beta-glucanase, exo-1,4-beta-glucanase, 1,4-beta-glucosidase, endo-1,4-beta-xylanase, 1,4-beta-xylosidase and 1,4-beta-mannosidase and ligninolytic enzymes Mn-peroxidase and laccase were detected during the growth of the white-rot fungus Pleurotus ostreatus on wheat straw in the presence and absence of cadmium. The loss of substrate dry weight and Mn-peroxidase activity decreased with increasing Cd concentration, whereas the activities of endo-1,4-beta-glucanase, 1,4-beta-glucosidase and laccase were highly increased in the presence of metal. The onset of hemicellulose-degrading enzyme activity was delayed in the presence of cadmium. The degradation of a model synthetic dye Poly B-411 did not correspond to the activities of ligninolytic enzymes. This is the first report about 1,4-beta-mannosidase in P. ostreatus. |
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Keywords: | Cadmium Cellulose Hemicellulose Laccase Mn-peroxidase Pleurotus ostreatus |
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