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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Influence of organic nutrients and cocultures on the competitive behavior of 1,2-dichloroethane-degrading bacteria.

The effects of organic nutrients and cocultures on substrate removal by and competitive behavior of 1,2-dichloroethane-degrading bacteria were investigated. Xanthobacter autotrophicus GJ10 needed biotin for optimal growth on 1,2-dichloroethane. In continuous culture, dilution of biotin to a concentration below 0.2 nM resulted in washout. Growth could be restored by inoculation with the 2-chloroethanol utilizer Pseudomonas sp. strain GJ1, leading to a new steady state in which about 1% of the mixed culture consisted of cells of strain GJ1. This indicates that strain GJ1 excreted biotin or a precursor for its synthesis. Inoculation of the mixed culture with Ancylobacter aquaticus AD25 did not result in washout of strain GJ10, although strain AD25 has a 10-fold-lower Ks for growth on 1,2-dichloroethane. Strain AD25 did not become dominant because of the lack of vitamins, which are necessary for its optimal growth. The results indicate that medium composition and the presence of other species strongly influence the effect of substrate limitation on the composition of a bacterial population that degrades a xenobiotic compound in a continuous culture.[1]

References

  1. Influence of organic nutrients and cocultures on the competitive behavior of 1,2-dichloroethane-degrading bacteria. van den Wijngaard, A.J., van der Kleij, R.G., Doornweerd, R.E., Janssen, D.B. Appl. Environ. Microbiol. (1993) [Pubmed]
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