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Population structure and adaptation in aquatic SphingomonadaceaePopulationsstruktur und Adaptation in aquatischen Sphingomonadaceae

Population structure and adaptation in aquatic Sphingomonadaceae

We study a Sphingomonadaceae population from the freshwater lakes Walchensee and Starnberger See in the southern part of Germany. The analysis of 9 housekeeping genes of 95 strains of Sphingomonadaceae revealed the presence of distinct subpopulations. Parallel Illumina sequencing and analyses of internal transcribed spacers (ITS1) identified distinct temporal patterns for individual ITS types suggesting that the corresponding Sphingomonadaceae lineages actually occupy different ecological niches. However, the mechanisms of niche separation of the Sphingomonadaceae lineages cannot be explained by substrate utilization alone and may be related to other traits. Current investigations focus on the genomic targets of selection.

Representative publications

  • Jogler M, Siemens H, Chen H, Bunk B, Sikorski J, Overmann J (2011) Identification and targeted cultivation of abundant novel freshwater sphingomonads and analysis of their population substructure. Appl Environ Microbiol 77:7355-7364.
  • H. Chen, M. Jogler, M. Rohde, H.-P. Klenk, H.-J. Busse, B. Tindall, C. Spröer, J. Overmann (2012) Reclassification and amended description of Caulobacter leidyi as Sphingomonas leidyi comb. nov., and emendation of the genus Sphingomonas. Int J System Evol Microbiol 62: 2835–2843
  • H. Chen, M. Jogler, M. Rohde, H.-P. Klenk, H.-J. Busse, B. Tindall, C. Spröer, J. Overmann (2013) Sphingobium limneticum sp. nov., and Sphingobium boeckii, two novel freshwater planktonic members of the family Sphingomonadaceae, and reclassification of Sphingomonas suberifaciens as Sphingobium suberifaciens comb. nov. Int J Syst Evol Microbiol 63:735 - 743
Photo of Jörg  Overmann
Prof. Dr. Overmann, Jörg
Phone: +49-531/2616-352

Scientific Director / Wissenschaftlicher Direktor

Photo of Johannes  Sikorski
Dr. Sikorski, Johannes
Phone: +49-531/2616-111