The anaerobic oxidation of methane in paddy soil by ferric iron and nitrate, and the microbial communities involved

2021 ◽  
pp. 147773
Author(s):  
Dan Luo ◽  
Xiangtian Meng ◽  
Ningguo Zheng ◽  
Yaying Li ◽  
Huaiying Yao ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Paddy Soil ◽  
Ferric Iron ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane

Assimilation of methane and inorganic carbon by microbial communities mediating the anaerobic oxidation of methane

2008 ◽  
Vol 10 (9) ◽  
pp. 2287-2298 ◽  
Author(s):  
Gunter Wegener ◽  
Helge Niemann ◽  
Marcus Elvert ◽  
Kai-Uwe Hinrichs ◽  
Antje Boetius
Keyword(s):  
Microbial Communities ◽  
Inorganic Carbon ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane

scholarly journals Archaea catalyze iron-dependent anaerobic oxidation of methane

2016 ◽  
Vol 113 (45) ◽  
pp. 12792-12796 ◽  
Author(s):  
Katharina F. Ettwig ◽  
Baoli Zhu ◽  
Daan Speth ◽  
Jan T. Keltjens ◽  
Mike S. M. Jetten ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Ferrous Iron ◽  
Ferric Iron ◽  
Enrichment Culture ◽  
Biogeochemical Cycles ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane ◽  
Reducing Conditions ◽  
Nitrite Nitrate

Anaerobic oxidation of methane (AOM) is crucial for controlling the emission of this potent greenhouse gas to the atmosphere. Nitrite-, nitrate-, and sulfate-dependent methane oxidation is well-documented, but AOM coupled to the reduction of oxidized metals has so far been demonstrated only in environmental samples. Here, using a freshwater enrichment culture, we show that archaea of the order Methanosarcinales, related to “Candidatus Methanoperedens nitroreducens,” couple the reduction of environmentally relevant forms of Fe3+ and Mn4+ to the oxidation of methane. We obtained an enrichment culture of these archaea under anaerobic, nitrate-reducing conditions with a continuous supply of methane. Via batch incubations using [13C]methane, we demonstrated that soluble ferric iron (Fe3+, as Fe-citrate) and nanoparticulate forms of Fe3+ and Mn4+ supported methane-oxidizing activity. CO2 and ferrous iron (Fe2+) were produced in stoichiometric amounts. Our study connects the previous finding of iron-dependent AOM to microorganisms detected in numerous habitats worldwide. Consequently, it enables a better understanding of the interaction between the biogeochemical cycles of iron and methane.

scholarly journals Different impacts of an electron shuttle on nitrate- and nitrite-dependent anaerobic oxidation of methane in paddy soil

2021 ◽  
Vol 67 (No. 5) ◽  
pp. 264-269
Author(s):  
Yaohong Zhang ◽  
Fangyuan Wang
Keyword(s):  
Organic Matter ◽  
Paddy Soil ◽  
Anaerobic Oxidation Of Methane ◽  
Electron Shuttle ◽  
Anaerobic Oxidation ◽  
Terminal Electron Acceptor ◽  
Electron Shuttles ◽  
Oxidation Of Methane ◽  
Nitrate And Nitrite ◽  
C Assimilation

Quinones, redox-active functional groups in soil organic matter, can act as electron shuttles for microbial anaerobic transformation. Here, we used <sup>13</sup>CH<sub>4</sub> to trace <sup>13</sup>C conversion (<sup>13</sup>C-CO<sub>2</sub> + <sup>13</sup>C-SOC) to investigate the influence of an artificial electron shuttle (anthraquinone-2,6-disulfonate, AQDS) on denitrifying anaerobic methane oxidation (DAMO) in paddy soil. The results showed that AQDS could act as the terminal electron acceptor for the anaerobic oxidation of methane (AOM) in the paddy field. Moreover, AQDS significantly enhanced nitrate-dependent AOM rates and the amount of <sup>13</sup>C-CH<sub>4</sub> assimilation to soil organic carbon (SOC), whereas it was remarkably reduced nitrite-dependent AOM rates and <sup>13</sup>C assimilation. Ultimately, AQDS notably increased the total DAMO rates and <sup>13</sup>C assimilation to SOC. However, the electron shuttle did not change the percentage of <sup>13</sup>C-SOC in total <sup>13</sup>C-CH<sub>4</sub> conversion. These results suggest that electron shuttles in the natural organic matter might be able to offset methane emission by facilitating AOM coupled with the denitrification process.

Anaerobic oxidation of methane in paddy soil: Role of electron acceptors and fertilization in mitigating CH4 fluxes

2020 ◽  
Vol 141 ◽  
pp. 107685 ◽  
Author(s):  
Lichao Fan ◽  
Michaela A. Dippold ◽  
Tida Ge ◽  
Jinshui Wu ◽  
Volker Thiel ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Electron Acceptors ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane

Simultaneous nitrate and sulfate dependent anaerobic oxidation of methane linking carbon, nitrogen and sulfur cycles

2021 ◽  
Vol 194 ◽  
pp. 116928
Author(s):  
Wen-Bo Nie ◽  
Jie Ding ◽  
Guo-Jun Xie ◽  
Xin Tan ◽  
Yang Lu ◽  
...  
Keyword(s):  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Oxidation Of Methane
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