Lam BR, Barr CR, Rowe AR, Nealson KH (1979) Differences in applied redox potential on cathodes enrich for diverse electrochemically active microbial isolates from a marine sediment. Kong D, Yun H, Cui D, Qi M, Shao C, Cui D, Ren N, Liang B, Wang A (2017) Response of antimicrobial nitrofurazone-degrading biocathode communities to different cathode potentials. Gupta D, Sutherland MC, Rengasamy K, Meacham JM, Kranz RG, Bose A (2019) Photoferrotrophs produce a PioAB electron conduit for extracellular electron uptake. Nevin KP, Hensley SA, Franks AE, Summers ZM, Ou J, Woodard TL, Snoeyenbos-West OL, Lovley DR (2011) Electrosynthesis of organic compounds from carbon dioxide is catalyzed by a diversity of acetogenic microorganisms. Logan BE, Rabaey K (2012) Conversion of wastes into bioelectricity and chemicals by using microbial electrochemical technologies. Kumar A, Hsu LHH, Kavanagh P, Barriere F, Lens PNL, Lapinsonniere L, Lienhard JH, Schroder U, Jiang XC, Leech D (2017) The ins and outs of microorganism-electrode electron transfer reactions. Lu A, Li Y, Jin S, Wang X, Wu XL, Zeng C, Li Y, Ding H, Hao R, Lv M et al (2012) Growth of non-phototrophic microorganisms using solar energy through mineral photocatalysis. Lovley DR (2010) Extracellular electron transfer: wires, capacitors, iron lungs, and more. Hernandez ME, Newman DK (2001) Extracellular electron transfer. Myers CR, Nealson KH (1988) Bacterial manganese reduction and growth with manganese oxide as the sole electron acceptor. Lovley DR, Phillips EJ (1988) Novel mode of microbial energy metabolism: organic carbon oxidation coupled to dissimilatory reduction of iron or manganese. In addition, microorganisms selectively enriched on open-circuit electrodes possess higher connectivity and closer relationship than microorganisms selectively enriched on closed-circuit electrode.įalkowski PG, Fenchel T, Delong EF (2008) The microbial engines that drive earth’s biogeochemical cycles. We also show that specific bacteria were preferentially enriched by different electrode potentials, i.e., Pseudomonas and Rhodobacter preferentially grew on − 0.05 V and − 0.29 V cathode potentials, Azospirillum and Bosea preferentially grew on − 0.05 V while Ferrovibrio, Hydrogenophaga, Delftia, and Sphingobium preferentially grew on − 0.29 V. Results reveal that the structure of bacterial communities was highly similar for all closed-circuit electrodes (− 0.29 V, − 0.05 V), while differing significantly from those on open-circuit electrodes. Here, we incubated a lake sediment in a single-chamber reactor equipped with three working electrodes, i.e., with potentials of − 0.29 V, − 0.05 V versus standard hydrogen electrode and open-circuit, respectively. However, it remains under-researched how a microbial community response to the different redox potentials in different environments. Conventional studies on the effects of different electron donors on microbial community has been extensively studied with a set cathode potential. Microbes use both organic and inorganic compounds as electron donors, with different electronic potentials, to produce energy required for growth in environments.
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