Effect of environmental C/N ratio on activities of lignin-degrading enzymes produced by Phanerochaete chrysosporium |
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Authors: | Saihua HUANG Deyin HUANG Qitang WU Meifang HOU Xiaoyan TANG Jian ZHOU |
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Affiliation: | 1College of Natural Resources and Environment, South China Agricultural University, 483 Wushan Street, Guangzhou 510642 (China);2School of Ecological Technology and Engineering, Shanghai Institute of Technology, 100 Haiquan, Shanghai 201418 (China);3Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-environmental and Soil Sciences, 808 Tianyuan Road, Guangzhou 510650 (China) |
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Abstract: | Lignin-degrading enzymes secreted by white rot fungi play an important role in the degradation of lignin and persistent organic pollutants (POPs). In this study, effect of environmental C/N ratio on the activities of lignin-degrading enzymes, lignin peroxide (LiP) and manganese peroxidase (MnP), produced by Phanerochaete chrysosporium, a white rot fungus, was investigated. Glucose was used as C source, and ammonium tartrate of different concentrations was used as N source to provide different C/N ratios. Relationships between LiP and MnP activities and environmental C/N ratio were explored. The results showed that the higher the N source concentration, the faster the mycelium pellets aged. The faster the mycelium dry weight increased, the higher the LiP and MnP activities. A high C/N ratio was a necessary condition for the secretion of LiP or MnP. In addition, mycelium dry weight essentially affected enzyme activities. In the 122 C/N ratio and 50 C/N ratio treatments, mycelium dry weight essentially affected MnP activity and both LiP and MnP activities, respectively. |
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Keywords: | biodegration lignin peroxide manganese peroxidase peroxidase persistent organic pollutant polysaccharide white rot fungus |
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