Growth profile of Carboxydothermus hydrogenoformans on pyruvate

Carboxydothermus hydrogenoformans is a thermophilic anaerobic strain most widely known for its ability to produce hydrogen (H 2 ) when grown on carbon monoxide (CO). Although relatively well studied, growth characterization on pyruvate has never been assessed. The present work fully characterizes gr...

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Bibliographic Details
Published in:AMB Express 2013-10, Vol.3 (1), p.60-60, Article 60
Main Authors: Haddad, Mathieu, Cimpoia, Ruxandra, Zhao, Ya, Guiot, Serge R
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biotechnology
Carboxydothermus hydrogenoformans
Life Sciences
Microbial Genetics and Genomics
Microbiology
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Summary:Carboxydothermus hydrogenoformans is a thermophilic anaerobic strain most widely known for its ability to produce hydrogen (H 2 ) 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.
ISSN:2191-0855
2191-0855
DOI:10.1186/2191-0855-3-60