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The voltage signals of microbial fuel cell-based sensors positively correlated with methane emission flux in paddy fields of China

The voltage signals of microbial fuel cell-based sensors positively correlated with methane emission flux in paddy fields of China
The voltage signals of microbial fuel cell-based sensors positively correlated with methane emission flux in paddy fields of China

Previous studies showed that exoelectrogenic bacteria in paddy soil could suppress methanogens and methanogenesis after they were enriched by application of Fe 3+ or running microbial fuel cells (MFCs). However, the relationship between exoelectrogenic bacteria and methanogens without the enrichment process is unknown. Our study was conducted in three paddy fields in China and over three seasons. We explored novel MFC-based sensors to in situ detect voltage signals that were generated from paddy soil within 10 min. The voltage and methane emission flux were determined as an indicator of the exoelectrogenic activity and methanogenic activity, respectively. The abundance of exoelectrogenic bacteria was assessed by quantifying five exoelectrogenic bacterial-associated genera including Geobacter, Shewanella, Anaeromyxobacter, Desulfovibrio and Clostridium, while the methanogens were studied by quantifying and sequencing the mcrA gene. The results showed that the abundance of exoelectrogenic bacteria and the voltage signals were positively correlated to the abundance of mcrA gene and methane emission flux, respectively. Moreover, non-metric dimensional scaling reveals that the abundance of Geobacter, Desulfovibrio and Clostridium significantly correlated with that of Methanomassiliicoccus, Methanoregula and Methanolinea. The present study suggests that the voltage signals might act as a novel indicator of methane emission flux in paddy fields.

Clostridium, Geobacter, McrA gene, Microbial fuel cells, Paddy soil
0168-6496
1-11
Wu, Shao Song
7693fb8e-d82b-452e-9942-ef13fbad20d7
Hernández, Marcela
e73477e7-cf3e-4f50-97c8-4494c5b05cd0
Deng, Yong Cui
f6b3861f-888f-4061-9224-98733d865fc4
Han, Cheng
aa6d6161-24cf-4320-844f-27b82063aad5
Hong, Xin
9b3963e9-5c6c-4f9f-8edb-363c30559b24
Xu, Jie
593871b5-a17a-4e0f-ae0e-7e48b1aadd99
Zhong, Wen Hui
44b7329d-8375-4bbc-9214-a58f6c99efe9
Deng, Huan
f2f5ae65-75a8-4408-9a0d-dc85250812e7
Wu, Shao Song
7693fb8e-d82b-452e-9942-ef13fbad20d7
Hernández, Marcela
e73477e7-cf3e-4f50-97c8-4494c5b05cd0
Deng, Yong Cui
f6b3861f-888f-4061-9224-98733d865fc4
Han, Cheng
aa6d6161-24cf-4320-844f-27b82063aad5
Hong, Xin
9b3963e9-5c6c-4f9f-8edb-363c30559b24
Xu, Jie
593871b5-a17a-4e0f-ae0e-7e48b1aadd99
Zhong, Wen Hui
44b7329d-8375-4bbc-9214-a58f6c99efe9
Deng, Huan
f2f5ae65-75a8-4408-9a0d-dc85250812e7

Wu, Shao Song, Hernández, Marcela, Deng, Yong Cui, Han, Cheng, Hong, Xin, Xu, Jie, Zhong, Wen Hui and Deng, Huan (2019) The voltage signals of microbial fuel cell-based sensors positively correlated with methane emission flux in paddy fields of China. FEMS Microbiology Ecology, 95 (3), 1-11, [fiy018]. (doi:10.1093/femsec/fiz018).

Record type: Article

Abstract

Previous studies showed that exoelectrogenic bacteria in paddy soil could suppress methanogens and methanogenesis after they were enriched by application of Fe 3+ or running microbial fuel cells (MFCs). However, the relationship between exoelectrogenic bacteria and methanogens without the enrichment process is unknown. Our study was conducted in three paddy fields in China and over three seasons. We explored novel MFC-based sensors to in situ detect voltage signals that were generated from paddy soil within 10 min. The voltage and methane emission flux were determined as an indicator of the exoelectrogenic activity and methanogenic activity, respectively. The abundance of exoelectrogenic bacteria was assessed by quantifying five exoelectrogenic bacterial-associated genera including Geobacter, Shewanella, Anaeromyxobacter, Desulfovibrio and Clostridium, while the methanogens were studied by quantifying and sequencing the mcrA gene. The results showed that the abundance of exoelectrogenic bacteria and the voltage signals were positively correlated to the abundance of mcrA gene and methane emission flux, respectively. Moreover, non-metric dimensional scaling reveals that the abundance of Geobacter, Desulfovibrio and Clostridium significantly correlated with that of Methanomassiliicoccus, Methanoregula and Methanolinea. The present study suggests that the voltage signals might act as a novel indicator of methane emission flux in paddy fields.

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More information

Accepted/In Press date: 29 January 2019
e-pub ahead of print date: 30 January 2019
Published date: 1 March 2019
Keywords: Clostridium, Geobacter, McrA gene, Microbial fuel cells, Paddy soil

Identifiers

Local EPrints ID: 430658
URI: http://eprints.soton.ac.uk/id/eprint/430658
ISSN: 0168-6496
PURE UUID: 56b7199a-bdd1-497a-b14d-e8cea05f6304

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Date deposited: 08 May 2019 16:30
Last modified: 07 Oct 2020 00:52

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Contributors

Author: Shao Song Wu
Author: Marcela Hernández
Author: Yong Cui Deng
Author: Cheng Han
Author: Xin Hong
Author: Jie Xu
Author: Wen Hui Zhong
Author: Huan Deng

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