Biomineralization and Magnetism of Uncultured Magnetotactic Coccus Strain THC-1 With Non-chained Magnetosomal Magnetite Nanoparticles
文献类型：期刊论文
| 作者 | Li, Jinhua1,6,7; Menguy, Nicolas5,6; Leroy, Eric4; Roberts, Andrew P.3; Liu, Peiyu1,2,6,7; Pan, Yongxin1,2,6 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 125期号:12页码:19 |
| ISSN号 | 2169-9313 |
| 关键词 | magnetotactic bacteria non-chain magnetosome biomineralization magnetic properties THC-1 magnetofossil identification |
| DOI | 10.1029/2020JB020853 |
| 英文摘要 | Magnetotactic bacteria (MTB) have long fascinated geologists and biologists because they biomineralize intracellular single domain (SD) magnetite crystals within magnetosomes that are generally organized into single or multiple chains. MTB remains in the geological record (magnetofossils) are ideal magnetic carriers and are used to reconstruct paleomagnetic and paleoenvironmental information. Here we studied the biomineralization and magnetic properties of magnetosomal magnetite produced by uncultured magnetotactic coccus strain THC-1, isolated from the Tanghe River, China, by combining transmission electron microscope (TEM) and rock magnetic approaches. Our results reveal that THC-1 produces hexagonal prismatic magnetite single crystals that are elongated along the [111] crystallographic direction. Most of the magnetite crystals within THC-1 are dispersed without obvious chain assembly. A whole-cell THC-1 sample yields a normal SD hysteresis loop and a Verwey transition temperature of similar to 112 K. In contrast to MTB cells with magnetosome chain(s), THC-1 cells have a teardrop first-order reversal curve distribution that is indicative of moderate interparticle interactions. Due to the absence of a magnetosome chain, THC-1 has relatively high values of the difference between the saturation isothermal remanent magnetization (SIRM) below and above the Verwey transition temperature for field-cooled and zero field-cooled SIRM curves (delta(FC), delta(ZFC)) and a low delta(FC)/delta(ZFC) value. Together with previous studies, our results demonstrate that some MTB species/strains can form magnetosomal magnetite without linear chain configurations. Magnetite produced by MTB has diverse magnetic properties, which are distinctive but not necessarily unique compared to other magnetite types. Therefore, combining bulk magnetic measurements and TEM observations remains necessary for identifying magnetofossils in the geological record. Plain Language Summary Magnetotactic bacteria (MTB) are intriguing because they produce magnetic nanocrystals of magnetite (Fe3O4) or greigite (Fe3S4) within intracellular organelles (magnetosomes) that can leave tiny magnetic fossils (magnetofossils) in the geological record. Magnetofossil identification for paleoenvironmental and paleomagnetic purposes is based heavily on knowledge of modern MTB that often organize magnetic particles into chain(s). We studied here the crystallographic and magnetic properties of uncultured magnetotactic coccus strain THC-1 in which magnetosomal magnetite particles are dispersed without obvious chain assembly. In contrast to whole-cell MTB samples with magnetosome chain(s), THC-1 has distinctive magnetic properties. Together with previous studies, our results demonstrate that MTB magnetite has diverse magnetic properties that are distinctive but not necessarily unique compared to other magnetite types. This indicates that combining magnetic measurements and transmission electron microscope observations remains necessary for identifying magnetofossils. |
| WOS关键词 | SINGLE-DOMAIN MAGNETITE ; TRANSMISSION ELECTRON-MICROSCOPY ; ORGANIC-CARBON FLUX ; DEEP-SEA SEDIMENTS ; BACTERIAL MAGNETITE ; FERROMAGNETIC-RESONANCE ; SIZE DISTRIBUTIONS ; PELAGIC SEDIMENTS ; REVERSAL ; MARINE |
| 资助项目 | National Natural Science Foundation of China[41920104009] ; National Natural Science Foundation of China[41890843] ; National Natural Science Foundation of China[41621004] ; Australian Research Council[DP160100805] ; Australian Research Council[DP200100765] ; Center for Ocean Mega-Science, Chinese Academy of Sciences[RVKEXUE2019GZ06] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000603664600043 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; Center for Ocean Mega-Science, Chinese Academy of Sciences ; Center for Ocean Mega-Science, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; Center for Ocean Mega-Science, Chinese Academy of Sciences ; Center for Ocean Mega-Science, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; Center for Ocean Mega-Science, Chinese Academy of Sciences ; Center for Ocean Mega-Science, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; Center for Ocean Mega-Science, Chinese Academy of Sciences ; Center for Ocean Mega-Science, Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/99980]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Li, Jinhua |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Innovat Acad Earth Sci, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia 4.Univ Paris Est Creteil, Inst Chim & Mat Paris Est, CNRS, UMR 7182, Thiais, France 5.Sorbonne Univ, Inst Mineral Phys Mat & Cosmochim, CNRS, UMR 7590,MNHN,IRD,IMPMC, Paris, France 6.CNRS, CAS, Int Associated Lab Evolut & Dev Magnetotact Multi, Beijing, Peoples R China 7.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jinhua,Menguy, Nicolas,Leroy, Eric,et al. Biomineralization and Magnetism of Uncultured Magnetotactic Coccus Strain THC-1 With Non-chained Magnetosomal Magnetite Nanoparticles[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2020,125(12):19. |
| APA | Li, Jinhua,Menguy, Nicolas,Leroy, Eric,Roberts, Andrew P.,Liu, Peiyu,&Pan, Yongxin.(2020).Biomineralization and Magnetism of Uncultured Magnetotactic Coccus Strain THC-1 With Non-chained Magnetosomal Magnetite Nanoparticles.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,125(12),19. |
| MLA | Li, Jinhua,et al."Biomineralization and Magnetism of Uncultured Magnetotactic Coccus Strain THC-1 With Non-chained Magnetosomal Magnetite Nanoparticles".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 125.12(2020):19. |
入库方式： OAI收割
来源：地质与地球物理研究所
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