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Jonathan P. Badalamenti, César I. Torres and Rosa Krajmalnik-Brown Light-responsive current generation by phototrophically enriched anode biofilms dominated by green sulfur bacteria Biotechnology and Bioengineering 110

Version of Record online: 23 NOV 2012 | DOI: 10.1002/bit.24779

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Photosynthetic bacteria can incorporate light energy and/or carbon into microbial processes occurring in microbial electrochemical cells (MXCs). Following a stepwise selective enrichment strategy for anoxygenic phototrophs that could act as anode-respiring bacteria (ARB), the authors describe light-responsive current generation by electrode-associated biofilms whereby current decreased upon illumination. Green sulfur bacteria were predominant in fresh- and saltwater enrichments, and the authors propose that these phototrophs were responsible for both the negative light-responsiveness and novel anode respiration patterns observed by cyclic voltammetry.

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