A bioelectrochemical approach to characterize extracellular electron transfer by Synechocystis sp. PCC6803.

ABSTRACT: Biophotovoltaic devices employ photosynthetic organisms at the anode of a microbial fuel cell to generate electrical power. Although a range of cyanobacteria and algae have been shown to generate photocurrent in devices of a multitude of architectures, mechanistic understanding of extracellular electron transfer by phototrophs remains minimal. Here we describe a mediatorless bioelectrochemical device to measure the electrogenic output of a planktonically grown cyanobacterium, Synechocystis sp. PCC6803. Light dependent production of current is measured, and its magnitude is shown to scale with microbial cell concentration and light intensity. Bioelectrochemical characterization of a Synechocystis mutant lacking Photosystem II demonstrates conclusively that production of the majority of phot

SUBMITTER: Cereda A 

PROVIDER: S-EPMC3956611 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature