当前位置： SCI文献检索 > BIORESOURCE TECHNOLOGY期刊下所有文献 > Biocathodes reducing oxygen at high potential select biofilms dominated by Ectothiorhodospiraceae populations harboring a specific association of genes.

Biocathodes reducing oxygen at high potential select biofilms dominated by Ectothiorhodospiraceae populations harboring a specific association of genes.

Abstract：

:Biocathodes polarized at high potential are promising for enhancing Microbial Fuel Cell performances but the microbes and genes involved remain poorly documented. Here, two sets of five oxygen-reducing biocathodes were formed at two potentials (-0.4V and +0.1V vs. saturated calomel electrode) and analyzed combining electrochemical and metagenomic approaches. Slower start-up but higher current densities were observed at high potential and a distinctive peak increasing over time was recorded on cyclic voltamogramms, suggesting the growth of oxygen reducing microbes. 16S pyrotag sequencing showed the enrichment of two operational taxonomic units (OTUs) affiliated to Ectothiorodospiraceae on high potential electrodes with the best performances. Shotgun metagenome sequencing and a newly developed method for the identification of Taxon Specific Gene Annotations (TSGA) revealed Ectothiorhodospiraceae specific genes possibly involved in electron transfer and in autotrophic growth. These results give interesting insights into the genetic features underlying the selection of efficient oxygen reducing microbes on biocathodes.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Desmond-Le Quéméner E,Rimboud M,Bridier A,Madigou C,Erable B,Bergel A,Bouchez T

doi

10.1016/j.biortech.2016.04.087

subject

Has Abstract

pub_date

2016-08-01 00:00:00

pages

55-62

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(16)30574-0

journal_volume

214

pub_type

杂志文章

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