Growth profile of Carboxydothermus hydrogenoformans on pyruvate

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Journal titleAMB Express
Article number54123
Pages15; # of pages: 5
SubjectCarbon monoxide; Water-gas shift reaction; C. hydrogenormans; Pyruvate
AbstractCarboxydothermus hydrogenoformans is a thermophilic anaerobic strain most widely known for its ability to produce hydrogen (H2) when grown on carbon monoxide (CO). Although relatively well studied, growth characterization on pyruvate has never been assessed. The present work fully characterizes growth of the bacterium on pyruvate as a sole carbon source. C. hydrogenoformans demonstrated a growth rate of 0.03 h-1, with pyruvate consumption ranging between 0.21 and 0.48 mol · g-1 volatile suspended solid · d-1. A lag phase was also observed when switching from pyruvate to CO. When grown simultaneously on pyruvate and CO, pyruvate consumption was initiated upon CO depletion. This was attributed to pyruvate oxidation inhibition by CO, and not to a diauxic phenomenom. The strain also showed homoacetogenic activity.
Publication date
PublisherSpringer (Open Access)
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NRC numberNRC-EME-53213
NPARC number21268970
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Record identifier23e27be8-bd14-46a0-aa78-372fff6e9915
Record created2013-11-28
Record modified2016-05-09
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