Carbon assimilation by strain KT71^T.

The proportion of assimilated carbon in KT71T upon growth on different substrates is compared with the phototrophic purple non-sulfur bacterium Rhodospirillum rubrum S-1T ( = DSM 467T) and the chemoheterotrophic alphaproteobacterium Silicibacter pomeroyi DSM 15171T. Batch cultures of KT71T and DSM 15171T were incubated with 2 mM L-malate, 2 mM succinate, 1 mM D-galactose and 3 mM acetate under an initial oxygen concentration of 6 vol% at 28°C. KT71T and DSM 15171T were adaptated to various carbon sources by one transfer from SMFC medium in defined medium containing the respective carbon source prior to inoculation of the main culture. Numbers in parentheses denote A880 nm/A660 nm values determined in KT71T cultures at early stationary phase. n.r., not reported. aData for R. rubrum are from Clayton [88].