Ligninolytic enzymes of selected white rot fungi cultivated on wheat straw |
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Authors: | B R M Vyas J Volc V Šašek |
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Institution: | (1) Institute of Microbiology, 142 20 Prague 4, Czech Republic |
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Abstract: | Ligninolytic enzymes of the white rot fungiCoriolopsis polyzona, Phanerochaete chrysosporium, andTrametes versicolor growing on wheat straw under nearly natural conditions were investigated. Manganese peroxidase (MnP), secreted as early as
on day 3, was dominant over other activities during the initial phase (the first 10 days). Its activity profile was similar
in all the three fungi. Lignin peroxidase (LIP) was not detected in the extracellular enzyme extracts ofC. polyzona andP. chrysosporium cultures.T. versicolor secreted LIP after 10 d of growth. Another, recently described, enzyme activity of manganese-independent peroxidase (MIP)
was detected in all the three fungi tested and it appeared on about day 5 (later than MnP and earlier than LIP); it was the
dominant activity after day 10. Laccase activity appeared at basal levels without any significant changes. Pyranose 2-oxidase
was probably the major extracellular H2O2-generating activity (with all the three fungi) that appeared contemporarily with MnP, increased with time, peaking on day
17–18. Glyoxal oxidase could not be detected with any of the fungi. |
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Keywords: | |
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