biostudies-literatureUnknown7Jangir YContinental subsurface environments can present significant energetic challenges to the resident microorganisms. While these environments are geologically diverse, potentially allowing energy harvesting by microorganisms that catalyze redox reactions, many of the abundant electron donors and acceptors are insoluble and therefore not directly bioavailable. Extracellular electron transfer (EET) is a metabolic strategy that microorganisms can deploy to meet the challenges of interacting with redox-active surfaces. Though mechanistically characterized in a few metal-reducing bacteria, the role, extent, and diversity of EET in subsurface ecosystems remains unclear. Since this process can be mimicked on electrode surfaces, it opens the door to electrochemical techniques to enrich for and quantifFrontiers in microbiology756https://www.ebi.ac.uk/biostudies/studies/S-EPMC4876122biostudies-literatureIsolation and Characterization of Electrochemically Active Subsurface Delftia and Azonexus Species.PMC4876122Moser DPFrench SEl-Naggar MYJangir YMomper LMAmend JPfalseIsolation and Characterization of Electrochemically Active Subsurface Delftia and Azonexus Species.Continental subsurface environments can present significant energetic challenges to the resident microorganisms. While these environments are geologically diverse, potentially allowing energy harvesting by microorganisms that catalyze redox reactions, many of the abundant electron donors and acceptors are insoluble and therefore not directly bioavailable. Extracellular electron transfer (EET) is a metabolic strategy that microorganisms can deploy to meet the challenges of interacting with redox-active surfaces. Though mechanistically characterized in a few metal-reducing bacteria, the role, extent, and diversity of EET in subsurface ecosystems remains unclear. Since this process can be mimicked on electrode surfaces, it opens the door to electrochemical techniques to enrich for and quantif2016-01-01T00:00:00Z20162025-05-29T21:24:22.791Z2019-03-27T02:14:16ZS-EPMC48761222724276810.3389/fmicb.2016.00756