Abstract
Planctomycetes are a unique and important phylum containing mostly aquatic bacteria, which are often associated with phototrophic surfaces. A complex lifestyle, their potential for the production of bioactive small molecules, their unusual cell biology and a large number of giant and hypothetical genes in their genomes make these microorganisms a fascinating topic for further research. Here, we characterise three novel planctomycetal strains isolated from polystyrene and polyethylene particles that were submerged in the German part of the Baltic Sea and the estuary of the river Warnow. All three strains showed typical planctomycetal traits such as division by polar budding and formation of rosettes. The isolated strains were mesophilic and neutrophilic chemoheterotrophs and reached generation times of 10–25 h during laboratory-scale cultivation. Taxonomically, the three strains belong to the genus Rubripirellula. Based on our analyses all three strains represent novel species, for which we propose the names Rubripirellula amarantea sp. nov., Rubripirellula tenax sp. nov. and Rubripirellula reticaptiva sp. nov. The here characterised strains Pla22T (DSM 102267T = LMG 29691T), Poly51T (DSM 103356T = VKM B-3438T) and Poly59T (DSM 103767T = LMG 29696T) are the respective type strains of these novel species. We also emend the description of the genus Rubripirellula.
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Acknowledgements
Part of this research was funded by the Deutsche Forschungsgemeinschaft (DFG) Grants No. KA 4967/1-1 and JO 893/4-1, Grant ALWOP.308 of the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), SIAM (Soehngen Institute for Anaerobic Microbiology) Grant No. 024002002 and the Radboud Excellence fellowship. We thank Ina Schleicher for skillful technical assistance and our collaborators Sonja Oberbeckmann and Matthias Labrenz (IOW Warnemünde, Germany) for sampling support. We would also like to thank Brian Tindall and Regine Fähnrich as well as the BCCM/LMG Bacteria collection for on-going support during strain deposition.
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NK wrote the manuscript, analyzed the data and prepared the figures; SW and MJ performed the genomic and phylogenetic analysis; AH isolated the strains and performed the initial cultivation and strain deposition; SHP and CB performed the light microscopic analysis; MSMJ contributed to text preparation and revised the manuscript; MR performed the electron microscopic analysis; CJ and MJ took the samples in the Baltic Sea and the river Warnow and CJ supervised the study. All authors read and approved the final version of the manuscript
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Kallscheuer, N., Jogler, M., Wiegand, S. et al. Three novel Rubripirellula species isolated from plastic particles submerged in the Baltic Sea and the estuary of the river Warnow in northern Germany. Antonie van Leeuwenhoek 113, 1767–1778 (2020). https://doi.org/10.1007/s10482-019-01368-3
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DOI: https://doi.org/10.1007/s10482-019-01368-3