Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean

Kaixuan CUI; Wenyan ZHANG; Jia LIU; Cong XU; Yicong ZHAO; Si CHEN; Hongmiao PAN; Tian XIAO; Long-Fei WU

doi:10.1007/s00343-021-0029-x

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Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean

Special Section: Magnetotactic Bacteria and Magnetoreception | Updated：2023-05-20

- Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean
- Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean
- 海洋湖沼学报（英文） 2021年39卷第6期页码：2027-2043
- Affiliations：
  
  1.CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
  2.Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China
  3.University of Chinese Academy of Sciences, Beijing 100049, China
  4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
  5.International Associated Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms(LIA-MagMC), CNRS-CAS, Qingdao 266071, China
  6.Aix Marseille Univ, CNRS, LCB, IM2 B, IMM, Marseille 13009, France
  7.National Oceanographic Center, Qingdao 266071, China
- Author bio：
  
  Tian XIAO, txiao@qdio.ac.cn
  Hongmiao PAN, panhongmiao@qdio.ac.cn
- Funds：
  
  the National Natural Science Foundation of China(41776130);the National Natural Science Foundation of China(41776131);the National Natural Science Foundation of China-Shandong Joint Fund(U1706208);the Youth Talent Support Program of the Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao)(LMEES-YTSP-2018-01-07);the Science & Technology Basic Resources Investigation Program of China(2017FY100803);© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
- DOI：10.1007/s00343-021-0029-x
  中图分类号：
- 收稿：2021-01-23，
  
  录用：2021-4-6，
  
  网络首发：2021-04-30，
  
  纸质出版：2021-11
- Accepted：
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Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean[J]. 海洋湖沼学报（英文）, 2021,39(6):2027-2043.

Kaixuan CUI, Wenyan ZHANG, Jia LIU, et al. Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean[J]. Journal of Oceanology and Limnology, 2021, 39(6): 2027-2043.
Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean[J]. 海洋湖沼学报（英文）, 2021,39(6):2027-2043. DOI： 10.1007/s00343-021-0029-x.

Kaixuan CUI, Wenyan ZHANG, Jia LIU, et al. Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean[J]. Journal of Oceanology and Limnology, 2021, 39(6): 2027-2043. DOI： 10.1007/s00343-021-0029-x.

摘要

Abstract

Magnetotactic bacteria (MTB) are a group of microorganisms capable of orientating and swimming along magnetic fields because they contain intracellular biomineralized magnetosomes composed of magnetite (Fe

) or/and greigite (Fe

). They are ubiquitous in freshwater

brackish

and marine habitats

and are cosmopolitan in distribution. However

knowledge of their occurrence and distribution in seamount ecosystems is limited. We investigated the diversity and distribution of MTB in the Caroline Seamount (CM4). The abundance of living MTB in 12 stations in depth varying from 90 to 1 545 m was 1.1×10

-43.7×10

inds./dm

. Despite diverse shapes of MTB observed

magnetotactic cocci were the dominant morphotype and could be categorized into two types: 1) typical cocci that appeared to have peritrichous flagella; and 2) those characterized by having a drop-shaped form and one bundle of flagella located at the thin/narrow end of the cell. Transmission electron microscopy (TEM) analysis revealed that the magnetosomes formed by those magnetotactic cocci are magnetite (Fe

) with octahedral crystal habit. A total of 41 operational taxonomic units (OTUs) of putative MTB (2 702 reads) were acquired from nine stations

based on high-throughput sequencing. Of these

40 OTUs belonged to the Proteobacteria phylum and one belonged to the Nitrospirae phylum. We found apparent connectivity between the MTB populations on the Caroline and Kexue (

Science

in Chinese) seamounts

although the diversity of MTB on Caroline was much richer than on the Kexue Seamount. Our results imply that the unique topography of seamounts and other as-yet unclear environmental factors could lead to evolution of different flagella arrangements in magnetotactic cocci

and the occurrence of octahedral magnetite magnetosomes.

关键词

Keywords

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