Production of hydroxyl radicals following water-level drawdown in peatlands: A new induction mechanism for enhancing laccase activity in carbon cycling
文献类型：期刊论文
| 作者 | Zhao, Yunpeng1,4; Xiang, Wu; Huang, Chunlei3; Liu, Yang; Tan, Yu |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2021 |
| 卷号 | 156 |
| ISSN号 | 0038-0717 |
| 关键词 | Peatlands Hydroxyl radicals Laccase activity Water-level drawdown Carbon cycling |
| DOI | 10.1016/j.soilbio.2021.108241 |
| 文献子类 | Article |
| 英文摘要 | The hydroxyl radical (center dot OH) is the most powerful reactive oxygen species that plays a critical role in the fate of redox-active substances. Peatlands are carbon-rich ecosystems with highly reduced substances and ubiquitous redox interfaces. However, little is known about the production of center dot OH during the reoxidation of peatlands under waterlogged conditions. Here, we conduct a set of reoxidation experiments using waterlogged peat soil dominated by various vegetation species and monitored center dot OH production. The results show that the cumulative concentrations of center dot OH produced within 24 h upon oxygenation of waterlogged peat samples are 307-840 mmol g(-1). The main factors affecting the production of center dot OH include an acidic environment, abundant reduced dissolved organic matter and Fe(II). In addition, center dot OH production enhances laccase activity (the largest class of phenol oxidases in the soil) by 7.7% similar to 20.4% and increases soil respiration by 3.17% similar to 23.67% during the reoxidation of the waterlogged peat samples. In addition, the simulation experiments confirm that center dot OH can promote laccase activity directly by serving as an electron acceptor and indirectly by oxidizing substrates. Both mechanisms are greater than the effect of oxygen (O-2) alone on laccase activity. Our results indicate a new induction mechanism for enhancing laccase activity by center dot OH when subjected to anoxic-oxic interface fluctuations, which is particularly important for carbon cycling in peatlands because it can break the decomposition latch and can further promote soil organic carbon mineralization. |
| 学科主题 | Soil Science |
| 电子版国际标准刊号 | 1879-3428 |
| 出版地 | OXFORD |
| WOS关键词 | DISSOLVED ORGANIC-MATTER ; DARK PRODUCTION ; PHENOL OXIDASE ; IRON ; DECOMPOSITION ; OXIDATION ; SYSTEMS ; SOIL ; FE ; FLUORESCENCE |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000640189100029 |
| 资助机构 | National Natural Science Foundation of China [NSFC 41977263] ; Open Fund of Technical Innovation Center of Agricultural Land Ecological Evaluation and Restoration Engineering in Plain Area, Ministry of Natural Resources of the People's Republic of China [ZJGCJ202002] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/26641]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.China Univ Geosci, Sch Earth Sci, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China 2.Zhejiang Geol Survey Inst, Hangzhou 311305, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Yunpeng,Xiang, Wu,Huang, Chunlei,et al. Production of hydroxyl radicals following water-level drawdown in peatlands: A new induction mechanism for enhancing laccase activity in carbon cycling[J]. SOIL BIOLOGY & BIOCHEMISTRY,2021,156. |
| APA | Zhao, Yunpeng,Xiang, Wu,Huang, Chunlei,Liu, Yang,&Tan, Yu.(2021).Production of hydroxyl radicals following water-level drawdown in peatlands: A new induction mechanism for enhancing laccase activity in carbon cycling.SOIL BIOLOGY & BIOCHEMISTRY,156. |
| MLA | Zhao, Yunpeng,et al."Production of hydroxyl radicals following water-level drawdown in peatlands: A new induction mechanism for enhancing laccase activity in carbon cycling".SOIL BIOLOGY & BIOCHEMISTRY 156(2021). |
入库方式： OAI收割
来源：植物研究所
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