Xiao, Leilei1,5,6
; Zheng, Shiling1,6; Lichtfouse, Eric3; Luo, Min4; Tan, Yang6; Liu, Fanghua1,2,5,6发表期刊SOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
2020-11-01
卷号150页码:9
关键词MethaneDIET-Independent methanogenesisConductive materialAcetoclastic methanogenesisPure cultureProteome
DOI10.1016/j.soilbio.2020.107938
通讯作者Liu, Fanghua(fhliu@yic.ac.cn)
英文摘要Direct interspecies electron transfer (DIET) between electricigens and methanogens has been shown to favour CO2 reduction to produce biomethane. Furthermore, DIET is accelerated by conductive materials. However, whether conductive materials can promote other methanogenic pathways is unclear due to a lack of detailed experimental data and the poor mechanistic studies. Here, we hypothesized that conductive carbon nanotubes (CNTs) stimulate acetoclastic methanogenesis independently of electricigens in pure cultures of Methanosarcina spp. and anaerobic wetland soil. We found a significant increase in the methane production rate during the growth phase, e.g. from 0.169 mM to 0.241 mM after addition of CNTs on the 3rd day. CNTs did not increase the abundance of electromicroorganisms or the electron transfer rate in anaerobic soils, using via microbial diversity and electrochemical analysis. C-13-CH3COOH labelling, stable carbon isotope fractionation and the CH3F inhibitor of acetoclastic methanogenesis were used to distinguish methanogenic pathways. CNTs mainly accelerated acetoclastic methanogenesis rather than CO2 reduction in both pure cultures and anaerobic soils. Furthermore, the presence of CNTs slightly alleviate the inhibition of CH3F on acetoclastic methanogenesis during the pure culture of Methanosarcina barkeri and Methanosarcina mazei with the production of more than 0.3 mM methane. CNTs closely attached to the cell surface were observed by transmission electron microscopy. Proteome analysis revealed a stimulation of protein synthesis with about twice the improvement involved in -COOH oxidation and electron transfer. Overall, our findings demonstrate that conducting CNTs favor methane production and that the mechanism involved is acetoclastic methanogenesis via acetate dismutation, at least partly, rather than classical CO2 reduction.
资助机构National Natural Science Foundation of China; Natural Science Foundation of Shandong Province; Young Taishan Scholars Program of Shandong Province
收录类别SCI
语种英语
关键词[WOS]INTERSPECIES ELECTRON-TRANSFER; METHANE PRODUCTION; ISOTOPE FRACTIONATION; ORGANIC-MATTER; PADDY SOIL; GROWTH; CO2; COMMUNITIES; BACTERIAL; ACETATE
研究领域[WOS]Agriculture
WOS记录号WOS:000581509300005
引用统计被引频次：15[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/28453
专题海岸带生物学与生物资源利用重点实验室
海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室
通讯作者Liu, Fanghua作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Biol & Biol Resources Utilizat, Yantai 264003, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China
3.Aix Marseille Univ, Coll France, CEREGE, INRAE,IRD,CNRS, Ave Louis Philibert, F-13100 Aix En Provence, France
4.Fuzhou Univ, Sch Environm & Resource, Fuzhou 350116, Peoples R China
5.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
6.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China
推荐引用方式
GB/T 7714Xiao, Leilei,Zheng, Shiling,Lichtfouse, Eric,et al. Carbon nanotubes accelerate acetoclastic methanogenesis: From pure cultures to anaerobic soils[J]. SOIL BIOLOGY & BIOCHEMISTRY,2020,150:9.
APAXiao, Leilei,Zheng, Shiling,Lichtfouse, Eric,Luo, Min,Tan, Yang,&Liu, Fanghua.(2020).Carbon nanotubes accelerate acetoclastic methanogenesis: From pure cultures to anaerobic soils.SOIL BIOLOGY & BIOCHEMISTRY,150,9.
MLAXiao, Leilei,et al."Carbon nanotubes accelerate acetoclastic methanogenesis: From pure cultures to anaerobic soils".SOIL BIOLOGY & BIOCHEMISTRY 150(2020):9.
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