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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
Bullet-Shaped Magnetite Biomineralization Within a Magnetotactic Deltaproteobacterium: Implications for Magnetofossil Identification

文献类型：期刊论文

作者Li, Jinhua6,7,8; Menguy, Nicolas1,6; Roberts, Andrew P.5; Gu, Lin4; Leroy, Eric3; Bourgon, Julie3; Yang, Xin'an4; Zhao, Xiang5; Liu, Peiyu2,6,7,8; Changela, Hitesh G.8
刊名JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
出版日期2020-07-01
卷号125期号:7页码:16
ISSN号2169-8953
DOI10.1029/2020JG005680
英文摘要Magnetite produced by magnetotactic bacteria (MTB) provides stable paleomagnetic signals because it occurs as natural single-domain magnetic nanocrystals. MTB can also provide useful paleoenvironmental information because their crystal morphologies are associated with particular bacterial groups and the environments in which they live. However, identification of the fossil remains of MTB (i.e., magnetofossils) from ancient sediments or rocks is challenging because of their generally small sizes and because the growth, morphology, and chain assembly of magnetite within MTB are not well understood. Nanoscale characterization is, therefore, needed to understand magnetite biomineralization and to develop magnetofossils as biogeochemical proxies for paleoenvironmental reconstructions. Using advanced transmission electron microscopy, we investigated magnetite growth and chain arrangements within magnetotactic Deltaproteobacteria strain WYHR-1, which reveals how the magnetite grows to form elongated, bullet-shaped nanocrystals. Three crystal growth stages are recognized: (i) initial isotropic growth to produce nearly round similar to 20 nm particles, (ii) subsequent anisotropic growth along the [001] crystallographic direction to similar to 75 nm lengths and similar to 30-40 nm widths, and (iii) unidirectional growth along the [001] direction to similar to 180 nm lengths, with some growing to similar to 280 nm. Crystal growth and habit differ from that of magnetite produced by other known MTB strains, which indicates species-specific biomineralization. These findings suggest that magnetite biomineralization might be much more diverse among MTB than previously thought. When characterized adequately at species level, magnetofossil crystallography, and apomorphic features are, therefore, likely to become useful proxies for ancient MTB taxonomic groups or species and for interpreting the environments in which they lived. Plain Language Summary Biomineralization is a widespread process that provides living organisms with mineralized skeletons and organelles. Biominerals are mainly responsible for Earth's fossil record. As a striking example of microbial biomineralization, magnetotactic bacteria form intracellular chains of magnetic nanocrystals that they use to sense Earth's magnetic field. Their fossilized remains (magnetofossils) are being used increasingly to reconstruct paleomagnetic and paleoenvironmental information. However, magnetofossil identification remains challenging because magnetite particle growth and chain assembly processes are poorly understood. We report a species-specific crystal growth and chain arrangement process in a novel magnetotactic strain WYHR-1. Our findings suggest that magnetofossil crystallography could become a proxy for ancient bacterial taxonomic groups or species and for interpreting the environments in which they lived.
WOS关键词TRANSMISSION ELECTRON-MICROSCOPY ; SINGLE-CELL GENOMICS ; BACTERIA REVEALS ; CRYSTAL-GROWTH ; MAGNETOSOME ; MORPHOLOGY ; GREIGITE ; ORIGIN ; PROKARYOTES ; DIVERSITY
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] ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences[RVKEXUE2019GZ06] ; Australian Research Council[DP160100805]
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000556580000011
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Center for Ocean Me Mega-Science, Chinese Academy of Sciences ; Australian Research Council ; Australian Research Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/97602]  
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.Sorbonne Univ, IMPMC, Paris, France
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
3.Univ Paris East, ICMPE, Thiais, France
4.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing, Peoples R China
5.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia
6.Chinese Acad Sci, Int Associated Lab Evolut & Dev Magnetotact Multi, CNRS, Beijing, Peoples R China
7.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
8.Chinese Acad Sci, Innovat Acad Earth Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Jinhua,Menguy, Nicolas,Roberts, Andrew P.,et al. Bullet-Shaped Magnetite Biomineralization Within a Magnetotactic Deltaproteobacterium: Implications for Magnetofossil Identification[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2020,125(7):16.
APA Li, Jinhua.,Menguy, Nicolas.,Roberts, Andrew P..,Gu, Lin.,Leroy, Eric.,...&Pan, Yongxin.(2020).Bullet-Shaped Magnetite Biomineralization Within a Magnetotactic Deltaproteobacterium: Implications for Magnetofossil Identification.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(7),16.
MLA Li, Jinhua,et al."Bullet-Shaped Magnetite Biomineralization Within a Magnetotactic Deltaproteobacterium: Implications for Magnetofossil Identification".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.7(2020):16.

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来源：地质与地球物理研究所

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