Polyethylene degradation by lignin-degrading fungi and manganese peroxidase |
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| Authors: | Yuka Iiyoshi Yuji Tsutsumi Tomoaki Nishida |
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| Institution: | (1) Department of Forest Resources Science Faculty of Agriculture, Shizuoka University, 422-8529 Shizuoka, Japan |
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| Abstract: | Degradation of high-molecular-weight polyethylene membrane by lignin-degrading fungi, IZU-154, Phanerochaete chrysosporium, and Trametes versicolor, was investigated under various nutritional conditions. IZU-154 showed the most significant polyethylene degradation among the three lignin-degrading fungi under nitrogen- or carbon-limited culture conditions. Furthermore, for T. versicolor and P. chrysosporium, the addition of Mn(II) into nitrogen- or carbon-limited culture medium enhanced polyethylene degradation. These results suggest that polyethylene degradation is related to ligninolytic activity of lignin-degrading fungi. Treatment of polyethylene membrane with partially purified manganese peroxidase (MnP) caused significant degradation in the presence of Tween 80, Mn(II), and Mn(III) chelator. This result demonstrates that MnP is the key enzyme in polyethylene degradation by lignin-degrading fungi.This study was presented in part at the 9th International Symposium on Wood and Pulping Chemistry, Montreal, Canada, June 9–12, 1997 |
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| Keywords: | Polyethylene Biodegradation Lignindegrading fungi Manganese peroxidase Ligninolytic activity |
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