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Carbon utilization profiles of river bacterial strains facing sole carbon sources suggest metabolic interactions

par Goetghebuer, Lise ;Servais, Pierre ;George, Isabelle
Référence FEMS microbiology letters, 364, 10, fnx098
Publication Publié, 2017-05-10

Article révisé par les pairs

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Résumé :

Microbial communities play a key role in water self-purification. They are primary drivers of biogenic element cyclesand ecosystem processes. However, these communities remain largely uncharacterized. In order to understand thediversity-heterotrophic activity relationship facing sole carbon sources, we assembled a synthetic community composedof 20 ‘typical’ freshwater bacterial species mainly isolated from the Zenne River (Belgium). The carbon source utilizationprofiles of each individual strain and of the mixed community were measured in Biolog Phenotype MicroArrays PM1 andPM2A microplates that allowed testing 190 different carbon sources. Our results strongly suggest interactions occurringbetween our planktonic strains as our synthetic community showed metabolic properties that were not displayed by itssingle components. Finally, the catabolic performances of the synthetic community and a natural community from thesame sampling site were compared. The synthetic community behaved like the natural one and was thereforerepresentative of the latter in regard to carbon source consumption.