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Publications

2019

  • Koehler L, Flemming FE, Schrallhammer M*. 2019. Towards an ecological understanding of the killer trait - A reproducible protocol for testing its impact on freshwater ciliates. European Journal of Protistology, 68:108-120. doi.org/10.1016/j.ejop.2019.02.002
  • Lanzoni O, Sabaneyeva E, Modeo L, Castelli M, Lebedeva N, Verni F, Schrallhammer M, Potekhin A, Petroni G*. 2019. Diversity and environmental distribution of the cosmopolitan endosymbiont “Candidatus Megaira”. Scientific Reports, 9:1179. doi.org/10.1038/s41598-018-37629-w

 

2018

  • Schu MG, Schrallhammer M*. 2018. Cultivation conditions can cause a shift from mutualistic to parasitic behavior in the symbiosis between Paramecium and its bacterial symbiont Caedibacter taeniospiralis. Current Microbiology, 75(8):1099-1102. doi: 10.1007/s00284-018-1493-1
  • Potekhin A, Schweikert M, Nekrasova I, Vitali V, Schwarzer S, Anikina A, Kaltz O, Petroni G, Schrallhammer M*. 2018. Complex life cycle, broad host range and adaptation strategy of the intranuclear Paramecium symbiont Preeria caryophila comb. nov. FEMS Microbiology Ecology, 94(7) doi: 10.1093/femsec/fiy076 
  • Schrallhammer M*, Castelli M, Petroni G. 2018. Phylogenetic relationships among endosymbiotic R-body producer: bacteria providing their host the killer trait. Systematic and Applied Microbiology41(3):213-220. doi: 10.1016/j.syapm.2018.01.005
  • Duncan A*, Dusi E, Schrallhammer M, Berendonk, TU, Kaltz O. 2018. Population-level dynamics in experimental mixed infections: evidence for competitive exclusion among bacterial parasites of Paramecium caudatum. Oikos127(9): 1380-1389. doi: 10.1111/oik.05280 
  • Grosser K, Ramasamy P, Amirabad AD, Schulz MH, Gasparoni G, Simon M, Schrallhammer M*2018. More than the ‘killer trait’: infection with the bacterial endosymbiont Caedibacter taeniospiralis causes transcriptomic modulation in Paramecium host. Genome Biology and Evolution, 10(2):646-656. doi: 10.1093/gbe/evy024 
  • Zaburannyi N, Grosser K, Gasparoni G, Müller R, Schrallhammer M1,*, Simon M1,*. 2018. Draft genome sequence and annotation of the obligate bacterial endosymbiont Caedibacter taeniospiralis, causative agent of the killer phenotype in Paramecium tetraureliaGenome Announcements6(3): e01418-17.

 

2016

  • Bella C2, Koehler L2, Grosser K, Berendonk TU, Petroni G, Schrallhammer M*2016. Fitness impact of obligate intranuclear bacterial symbionts depends on host growth phase. Frontiers in Microbiology, 7:2084. doi: 10.3389/fmicb.2016.02084
  • Castelli M*, Lanzoni O, Rossi L, Potekhin A, Schrallhammer M, Petroni G*. 2016. Evaluation of enrichment protocols for bacterial endosymbionts of ciliates by Real-Time PCR. Current Microbiology, 72(6):723-32. doi: 10.1007/s00284-016-1006-z
  • Szokoli F2, Sabaneyeva E2, Castelli M, Krenek S, Schrallhammer M, Soares CA, da Silva-Neto ID, Berendonk TU, Petroni G*. 2016. "Candidatus Fokinia solitaria", a novel "stand-alone" symbiotic lineage of Midichloriaceae (Rickettsiales). PLoS One, 11(1):e0145743. doi: 10.1371/journal.pone.0145743 

 

2015

  • Pucciarelli S2,*, Devaraj RR2, Mancini A, Ballarini P, Castelli M, Schrallhammer M, Petroni G, Miceli C. 2015. Microbial consortium associated with the Antarctic marine ciliate Euplotes focardii: an investigation from genomic sequences. Microbial Ecology, 70(2):484-97. doi: 10.1007/s00248-015-0568-9
  • Castelli M, Lanzoni O, Fokin SI, Schrallhammer M, Petroni G*. 2015. Response of the bacterial symbiont Holospora caryophila to different growth conditions of its host. European Journal of Protistology, 51(1):98-108. doi: 10.1016/j.ejop.2014.11.006

 

2014

  • Fokin SI, Schrallhammer M*, Chiellini C, Verni F, Petroni G. 2014. Free-living ciliates as potential reservoir for eukaryotic parasites: characterization of the trypanosomatid Herpetomonas sp. Parasites & Vectors, 7(1):203. doi:
  • Dusi E*, Krenek S, Schrallhammer M, Sachse R, Rauch G, Kaltz O, Berendonk TU. 2014. Vertically transmitted symbiont reduces host fitness along temperature gradient. Journal of Evolutionary Biology, 274:796-800. doi: 10.1111/jeb.12336 

 

2013-2006

  • Boscaro V2, Schrallhammer M2, Benken KA, Krenek S, Szokoli F, Berendonk TU, Schweikert M, Verni F, Sabaneyeva EV, Petroni G*. 2013. Rediscovering the genus Lyticum, multiflagellated symbionts of the order Rickettsiales. Scientific Reports,3:3305. doi: 101038/srep03305
  • Schrallhammer M1,*, Ferrantini F1, Vannini C, Galati S, Schweikert M, Görtz HD, 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, 88: e72581 doi:101371/journalpone0072581
  • Boscaro V, Fokin SI, 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, 651: 255-267. doi:
  • Schrallhammer M*, Galati S, Altenbuchner J, Schweikert M, Görtz, HD, 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, 484:290–296. doi: 10.1016/j.ejop.2012.01.008
  • Schrallhammer 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, 612: 455-64. doi: 101007/s00248-010-9772-9
  • Schrallhammer M*. 2010. The killer trait of Paramecium and its causative agents. Paleodiversity, 3(S): 79–88. Doi:
  • Schrallhammer M& Schweikert M. (2009). The killer effect of Paramecium and its causative agents. – In: Fujishima M. (ed.) Endosymbionts in Paramecium, vol. 12, pp. 228-246. Springer Verlag, Berlin Heidelberg, doi:10.1007/978-3-540-92677-1_9
  • Görtz H.D., Rosati G., Schweikert M., Schrallhammer M., Omura G. & Suzaki T. (2009). Implications of microbial symbionts on defence and competition of hosts-ciliates. – In: White J.F. & Torres M.S. (ed.) Defensive mutualism in microbial symbiosis, vol. 2, pp. 45-64. CRC, Boca Raton, doi: 10.1201/ 9781420069327 .
  • Pilhofer M, Bauer AP, Schrallhammer M, Richter L, Ludwig W, Schleifer KH, 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, 3520: e135. doi: 101093/nar/gkm836
  • Vannini C, Pöckl M, Petroni G, Wu QL, Lang E, Stackebrandt E, Schrallhammer M, Richardson PM, Hahn MW*. 2007. Endosymbiosis in statu nascendi: close phylogenetic relationship between obligately endosymbiotic and obligately free-living Polynucleobacter strains Betaproteobacteria. Environmental Microbiology, 92:347-359. doi: 10.1111/j.1462-2920.2006.01144.x
  • Schrallhammer M, Fokin SI, Schleifer KH, 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. doi: 10.1111/j.1550-7408.2006.00133.x

 

 

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