IGGCAS OpenIR  > 地球与行星物理院重点实验室
Bullet-Shaped Magnetite Biomineralization Within a Magnetotactic Deltaproteobacterium: Implications for Magnetofossil Identification
Li, Jinhua1,2,3; Menguy, Nicolas3,4; Roberts, Andrew P.5; Gu, Lin6; Leroy, Eric7; Bourgon, Julie7; Yang, Xin'an6; Zhao, Xiang5; Liu, Peiyu1,2,3,8; Changela, Hitesh G.1; Pan, Yongxin1,3,8
2020-07-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
Volume125Issue:7Pages:16
AbstractMagnetite 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.
DOI10.1029/2020JG005680
Funding OrganizationNational 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
WOS KeywordTRANSMISSION ELECTRON-MICROSCOPY ; SINGLE-CELL GENOMICS ; BACTERIA REVEALS ; CRYSTAL-GROWTH ; MAGNETOSOME ; MORPHOLOGY ; GREIGITE ; ORIGIN ; PROKARYOTES ; DIVERSITY
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000556580000011
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/97602
Collection地球与行星物理院重点实验室
Corresponding AuthorLi, Jinhua
Affiliation1.Chinese Acad Sci, Innovat Acad Earth Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
3.Chinese Acad Sci, Int Associated Lab Evolut & Dev Magnetotact Multi, CNRS, Beijing, Peoples R China
4.Sorbonne Univ, IMPMC, Paris, France
5.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia
6.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing, Peoples R China
7.Univ Paris East, ICMPE, Thiais, France
8.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
Recommended Citation
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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