Journal
ENVIRONMENTAL POLLUTION
Volume 266, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2020.115135
Keywords
Geobacter; Paddy soil; Greenhouse gases (GHGs); Interspecies electron transfer; Biogeochemical cycle
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Funding
- Ministry of Science and Technology, People's Republic of China [2019YFC1804104]
- National Natural Science Foundation of China as a key project of the Shandong [U1906222, 21677080]
- 111 program, the Ministry of Education, People's Republic of China [T2017002]
- special funds for basic scientific research services of central colleges and universities
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In the past two decades, more and more attentions have been paid to soil-derived greenhouse gases (GHGs) including carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) because there are signs that they have rising negative impacts on the sustainability of the earth surface system. Farmlands, particularly paddy soils, have been regarded as the most important emitter of GHGs (nearly 17%) due to a large influx of fertilization and the abundance in animals, plants and microorganisms. Geobacter, as an electroactive microorganism widely occurred in soil, has been well studied on electron transport mechanisms and the direct interspecies electron transfer. These studies on Geobacter illustrate that it has the ability to be involved in the pathways of soil GHG emissions through redox reactions under anaerobic conditions. In this review, production mechanisms of soil-derived GHGs and the amount of these GHGs produced had been first summarized. The cycling process of CH4 and N2O was described from the view of microorganisms and discussed the co-culture relationships between Geobacter and other microorganisms. Furthermore, the role of Geobacter in the production of soil-derived GHGs is defined by biogeochemical cycling. The complete view on the effect of Geobacter on the emission of soil-derived GHGs has been shed light on, and appeals further investigation. (C) 2020 Elsevier Ltd. All rights reserved.
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