|
|||||
|
|
Diverse phylogeny and morphology of magnetite biomineralized by magnetotactic cocci |
|
| Authors: | Peiyu Liu Yan Liu Xiang Zhao Andrew P Roberts Heng Zhang Yue Zheng Fuxian Wang Lushan Wang Nicolas Menguy Yongxin Pan Jinhua Li |
| Institution: | 1. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China France-China Joint Laboratory for Evolution and Development of Magnetotactic MultiCellular Organisms, Chinese Academy of Sciences, Beijing, China;2. Research School of Earth Sciences, Australian National University, Canberra, Australia;3. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China;4. Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China;5. State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Qingdao, China;6. France-China Joint Laboratory for Evolution and Development of Magnetotactic MultiCellular Organisms, Chinese Academy of Sciences, Beijing, China IMPMC, CNRS UMR 7590, Sorbonne Universités, MNHN, UPMC, IRD UMR 206, Paris, France;7. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China France-China Joint Laboratory for Evolution and Development of Magnetotactic MultiCellular Organisms, Chinese Academy of Sciences, Beijing, China;8. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China |
| Abstract: | Magnetotactic bacteria (MTB) are diverse prokaryotes that produce magnetic nanocrystals within intracellular membranes (magnetosomes). Here, we present a large-scale analysis of diversity and magnetosome biomineralization in modern magnetotactic cocci, which are the most abundant MTB morphotypes in nature. Nineteen novel magnetotactic cocci species are identified phylogenetically and structurally at the single-cell level. Phylogenetic analysis demonstrates that the cocci cluster into an independent branch from other Alphaproteobacteria MTB, that is, within the Etaproteobacteria class in the Proteobacteria phylum. Statistical analysis reveals species-specific biomineralization of magnetosomal magnetite morphologies. This further confirms that magnetosome biomineralization is controlled strictly by the MTB cell and differs among species or strains. The post-mortem remains of MTB are often preserved as magnetofossils within sediments or sedimentary rocks, yet paleobiological and geological interpretation of their fossil record remains challenging. Our results indicate that magnetofossil morphology could be a promising proxy for retrieving paleobiological information about ancient MTB. |
| Keywords: | |