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Endosymbiosis in Paramecium

Team leader: 
Martina Schrallhammer
Team members: 
Martina Schrallhammer
Chiara Bella
Kenia Sague
Institute or University: 
Microbiology, University of Freiburg
Schänzlestr. 1
Microbiology, Biological Institute II, University of Freiburg
Freiburg
79104
Germany
Research interests: 

Endosymbiosis between bacteria and aquatic ciliates, especially Paramecium

  • Microbial diversity
  • Function and role of endosymbionts
  • Epigenetic effects of bacterial infection on Paramecium
Keywords: 
Paramecium, endosymbiosis, parasite, infection, epigenetic influence
Techniques: 
fluorescence microscopy
transmission electron microscopy
molecular biology
Publications: 

Dusi E., Krenek S., Schrallhammer M., Sachse R., Rauch G., Kaltz O. & Berendonk T.U. (2014). Vertically transmitted symbiont reduces host fitness along temperature gradient.Journal of Evolutionary Biology 27: 196-800Boscaro V., Schrallhammer M., Benken K. A., Krenek S., Szokoli F., Berendonk T. U., Schweikert M., Verni F., Sabaneyeva E. V. & Petroni G. (2013). Rediscovering the genus Lyticum, multiflagellated symbionts of the order Rickettsiales.Scientific Reports 3:3305 doi: 10.1038/srep03305Schrallhammer M., Ferrantini F., Vannini C., Galati S., Schweikert M., Görtz H.D., Verni F. & Petroni G (2013). 'Candidatus Megaira polyxenophila' gen. nov., sp. nov.: considerations on evolutionary history, host range and shift of early divergent Rickettsiae.PLoS ONE 8(8): e72581. doi:10.1371/journal.pone.0072581Boscaro V., Fokin S.I., Schrallhammer M., Schweikert M. & Petroni G. (2013) Revised systematics of Holospora-like bacteria and characterization of "Candidatus Gortzia infectiva", a novel macronuclear symbiont of Paramecium jenningsi.Microbial Ecology 65(1): 255-267Schrallhammer M., Galati S., Altenbuchner J., Schweikert M., Görtz, H.D. & Petroni G. (2012). Tracing the role of R-bodies in the killer trait: absence of toxicity of R-body producing recombinant E. coli on paramecia.European Journal of Protistology 48(4): 290–296Schrallhammer M., Schweikert M., Vallesi A., Verni F. & Petroni G. (2011). Detection of a novel subspecies of Francisella noatunensis as endosymbiont of the ciliate Euplotes raikovi.Microbial Ecology 61(2): 455-64, DOI: 10.1007/s00248-010-9772-9Schrallhammer M. (2010). The killer trait of Paramecium and its causative agents.Paleodiversity 3, Supplement: 79–88Pilhofer M., Bauer A.P., Schrallhammer M., Richter L., Ludwig W., Schleifer K.H. & Petroni G. (2007). Characterization of bacterial operons consisting of two tubulins and a kinesin-like gene by the novel Two-Step Gene Walking method.Nucleic Acids Research 35(20): e135 PMCID: PMC2175320; doi: 10.1093/nar/gkm836Vannini C., Pöckl M., Petroni G., Wu Q.L., Lang E., Stackebrandt E., Schrallhammer M., Richardson P.M. & Hahn M.W. (2007). Endosymbiosis in statu nascendi: close phylogenetic relationship between obligately endosymbiotic and obligately free-living Polynucleobacter strains (Betaproteobacteria).Environmental Microbiology 9(2): 347-359Schrallhammer M., Fokin S.I., Schleifer K.H. &Petroni G. (2006). Molecular characterization of the obligate endosymbiont "Caedibacter macronucleorum" Fokin and Görtz 1993 and of its host Paramecium duboscqui strain Ku4-8.Journal of Eukaryotic Microbiology 53(6): 499-506

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