ArticlePloS one2013
A comparison of methods to measure the magnetic moment of magnetotactic bacteria through analysis of their trajectories in external magnetic fields.
Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed, 64 citations in OpenAlex.
- A magnetotactic bacterium capable of magnetic sensing.iScience · 2025Article
- Article
- Explicit analysis of magnetotactic bacteria motion reveals the length scaling of magnetic moments.Biophysical journal · 2025Article
- Physiological magnetic field strengths help magnetotactic bacteria navigate in simulated sediments.eLife · 2025Article
- Essential magnetosome proteins MamI and MamL from magnetotactic bacteria interact in mammalian cells.Scientific reports · 2024Article
- Collective magnetotaxis of microbial holobionts is optimized by the three-dimensional organization and magnetic properties of ectosymbionts.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Gradient Magnetic Field Accelerates Division ofCells · 2023Article
- Myths in magnetosensation.iScience · 2022Review
- Response to Static Magnetic Field-Induced Stress inMarine drugs · 2021Article
- Stokesian dynamics simulations of a magnetotactic bacterium.The European physical journal. E, Soft matter · 2021Article
- Quantifying the Benefit of a Dedicated "Magnetoskeleton" in Bacterial Magnetotaxis by Live-Cell Motility Tracking and Soft Agar Swimming Assay.Applied and environmental microbiology · 2020Article
- Chemotaxis in external fields: Simulations for active magnetic biological matter.PLoS computational biology · 2019Article
- Thrust and Power Output of the Bacterial Flagellar Motor: A Micromagnetic Tweezers Approach.Biophysical journal · 2019Article
- Growing Magnetotactic Bacteria of the Genus Magnetospirillum: Strains MSR-1, AMB-1 and MS-1.Journal of visualized experiments : JoVE · 2018Article
- Magnetic-field induced rotation of magnetosome chains in silicified magnetotactic bacteria.Scientific reports · 2018Article
- Measurement of the magnetic moment of single Magnetospirillum gryphiswaldense cells by magnetic tweezers.Scientific reports · 2017Article
- Fission and fusion scenarios for magnetic microswimmer clusters.Nature communications · 2016Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Magnetotactic bacteria possess organelles called magnetosomes that confer a magnetic moment on the cells, resulting in their partial alignment with external magnetic fields. Here we show that analysis of the trajectories of cells exposed to an external magnetic field can be used to measure the average magnetic dipole moment of a cell population in at least five different ways. We apply this analysis to movies of Magnetospirillum magneticum AMB-1 cells, and compare the values of the magnetic moment obtained in this way to that obtained by direct measurements of magnetosome dimension from electron micrographs. We find that methods relying on the viscous relaxation of the cell orientation give results comparable to that obtained by magnetosome measurements, whereas methods relying on statistical mechanics assumptions give systematically lower values of the magnetic moment. Since the observed distribution of magnetic moments in the population is not sufficient to explain this discrepancy, our results suggest that non-thermal random noise is present in the system, implying that a magnetotactic bacterial population should not be considered as similar to a paramagnetic material.
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