A plate-based electrochromic approach for the high-throughput detection of electrochemically active bacteria.

Abstract:

:Electrochemically active bacteria (EAB) have the ability to transfer electrons to electron acceptors located outside the cell, and they are widely present in diverse environments. In spite of their important roles in geochemical cycles, environmental remediation and electricity generation, so far, only a limited number and types of EAB have been isolated and characterized. Thus, effective and rapid EAB identification methods are highly desirable. In this protocol, we describe a photometric protocol for the visualization and high-throughput identification and isolation of EAB. The protocol relies on the fast electron acquisition and color change ability of an electrochromic material, namely a tungsten trioxide (WO3) nanorod assembly. The extracellular electron transfer (EET) from EAB to the WO3 nanorod assembly probe is accompanied by a bioelectrochromic reaction made evident by the color change of the probe. This protocol enables researchers to rapidly identify EAB and evaluate their EET ability either qualitatively with the naked eye or quantitatively by image analysis. We have also successfully used this protocol to isolate EAB from environmental samples. The time needed to complete this protocol is ∼2 d, with the actual EAB identification process taking about 5 min.

journal_name

Nat Protoc

journal_title

Nature protocols

authors

Yuan SJ,Li WW,Cheng YY,He H,Chen JJ,Tong ZH,Lin ZQ,Zhang F,Sheng GP,Yu HQ

doi

10.1038/nprot.2013.173

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

112-9

issue

1

eissn

1754-2189

issn

1750-2799

pii

nprot.2013.173

journal_volume

9

pub_type

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