Effect of Pb2+ on the production of hydroxyl radical during solid-state fermentation of straw with Phanerochaete chrysosporium |
| |
| Institution: | 1. College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China;2. Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China;1. Department of Neurology, Tong Ren Hospital Shanghai Jiaotong University School of Medicine, Shanghai, 200336, China;2. Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China;3. Department of Neurology, Yangpu Hospital Tongji University of Medicine, Shanghai Tengyue Road No. 450, China;1. Department of General Practice, Erasmus MC, University Medical Centre Rotterdam, PO Box 2040, 3000 CA Rotterdam, The Netherlands;2. Department of Orthopedic Surgery, Erasmus MC, University Medical Centre Rotterdam, PO Box 2040, 3000 CA Rotterdam, The Netherlands;1. Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, China;2. Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, Dalian Medical University, China;3. Research Institute of Integrated Traditional and Western Medicine of Dalian Medical University, Liaoning, China |
| |
| Abstract: | Hydroxyl radical ( OH) is a radical species highly destructive for lignin during solid-state fermentation (SSF) of straw with Phanerochaete chrysosporium (Pc). The production of OH at different initial Pb2+ concentrations during SSF of straw with Pc was investigated. The results showed that a modest amount (under 200 mg kg−1) of Pb2+ could enhance the production of OH, while a higher Pb2+ concentration resulted in inhibition. The content of OH reached the peak value at day 12 in the whole tested samples, and the maximal content of OH was obtained at initial Pb2+ concentration of 100 mg kg−1. It was also found that the production of OH was connected to enzymatic activity and oxalate content in some degree, in particular, a significant positive correlation was found between oxalate concentration and production of OH.We found that low concentration of Pb2+ can promote the degradation of lignin, and the higher initial Pb2+ concentration (400 mg kg−1) resulted in inhibition. In addition, it appeared that there was no significant correlation between lignin degradation rate and the production of OH when Pb2+ concentration was taken into account. |
| |
| Keywords: | Pb Hydroxyl radical Solid-state fermentation Enzymes Biodegradation Lignin |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
