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Evolutionary basis of bacterial diversityEvolutionäre Basis der bakteriellen Diversität

Population structure of Dinoroseobacter shibae and Phaeobacter gallaeciensis

As part of Transregional Collaborative Research Centre 51 (TRR 51) “Ecology, Physiology and Molecular Biology of the Roseobacter clade" of the German Science Foundation, the evolutionary mechanisms that underlie the large genetic and physiological divergence of the Roseobacter clade are investigated. The work focuses on the model organism Phaeobacter gallaeciensis with the aim to identify the population structure and the evolution on the intraspecific level. To this end, we combine high-throughput cultivation, physiological characterization of isolates by BIOLOG phenotyping, multilocus sequence analysis (MLSA) and functional genomics. This will yield insights into the role of horizontal gene transfer, gene duplication, gene loss and recombination events and will allow comparisons with the population structure of other bacteria.

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.
  • Overmann J (2010) Novel cultivation strategies for environmentally important microorganisms. Chapter 3. In: Barton, L., Mandl, M., Loy, A. (eds) Geomicrobiology: Molecular and Environmental Perspective. Springer. p.69-89
  • Gich F, Schubert K, Bruns A, Hoffelner H, Overmann J (2005) Specific detection, isolation and characterization of selected, previously uncultured members of freshwater bacterioplankton. Appl Environ Microbiol 71: 5908-5919
  • Jaspers E, Overmann J (2004) The ecological significance of "microdiversity": identical 16S rRNA gene sequences represent bacteria with highly divergent genomes and physiology. Appl Environ Microbiol 70: 4831-4839
Photo of Jörg  Overmann
Prof. Dr. Overmann, Jörg
Phone: +49-531/2616-352

Scientific Director / Wissenschaftlicher Direktor

Photo of Heike M.  Freese
Dr. Freese, Heike M.
Phone: +49-531/2616-360
Photo of Boyke  Bunk
Dr. Bunk, Boyke
Phone: +49-531/2616-322
Photo of Rüdiger  Pukall
Dr. Pukall, Rüdiger
Phone: +49-531/2616-229

Gram Positive Bacteria Aerobic, microaerophilic and obligate anaerobic Gram-positive bacteria from various taxa such as: Order Bacillales, Bifidobacteriales, "Lactobacillales", Coriobacteriales; suborder Micrococcineae, Propionibacterineae; family: Actinomycetaceae.

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