1
|
Sepulchro AGV, de Barros HL, de Mota HOL, Berbereia KS, Huamani KPT, Lopes LCDS, Sudbrack V, Acosta-Avalos D. Magnetoreception in multicellular magnetotactic prokaryotes: a new analysis of escape motility trajectories in different magnetic fields. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2020; 49:609-617. [PMID: 33033886 DOI: 10.1007/s00249-020-01467-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/27/2020] [Accepted: 09/28/2020] [Indexed: 12/16/2022]
Abstract
Magnetotactic microorganisms can be found as unicellular prokaryotes, as cocci, vibrions, spirilla and rods, and as multicellular organisms. Multicellular magnetotactic prokaryotes are magnetotactic microorganisms composed by several magnetotactic bacteria organized almost in a spherical helix, and one of the most studied is Candidatus Magnetoglobus multicellularis. Several studies have shown that Ca. M. multicellularis displays forms of behavior not well explained by magnetotaxis. One of these is escape motility, also known as "ping-pong" motion. Studies done in the past associated the "ping-pong" motion to some magnetoreceptive behavior, but those studies were never replicated. In the present manuscript a characterization of escape motility trajectories of Ca. M. multicellularis was done for several magnetic fields, considering that this microorganism swims in cylindrical helical trajectories. It was observed that the escape motility can be separated into three phases: (I) when the microorganism jumps from the drop border, (II) where the microorganism moves almost perpendicular to the magnetic field and (III) when the microorganism returns to the drop border. The total time of the whole escape motility, the time spent in phase II and the displacement distance in phase I decreases when the magnetic field increases. Our results show that the escape motility has several characteristics that depend on the magnetic field and cannot be understood by magnetotaxis, with a magnetoreceptive mechanism being the best explanation.
Collapse
Affiliation(s)
- Ana Gabriela Veiga Sepulchro
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador São-carlense 400, São Carlos, SP, 13566-590, Brazil
| | - Henrique Lins de Barros
- Centro Brasileiro de Pesquisas Físicas-CBPF, rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil
| | - Henrique Oliveira Leiras de Mota
- Departamento de Física, Centro de Ciências Exatas, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n-Bela Vista, Viçosa, MG, Brazil
| | - Karen Shiroiva Berbereia
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Campus Universitário da UFJF, Rua José Lourenço Kelmer s/n, São Pedro, Juiz de Fora, MG, 36036-900, Brazil
| | - Katterine Patricia Taipe Huamani
- Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos (UNMSM), calle Germán Amézaga 375, Cuidad Universitaria, Lima 1, Perú
| | - Lis Carneiro da Silva Lopes
- Departamento de Física, Centro de Ciências Exatas, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n-Bela Vista, Viçosa, MG, Brazil
| | - Vitor Sudbrack
- Instituto de Física Teórica, Universidade Estadual Paulista Julio de Mesquita Filho (IFT/UNESP), Rua Dr Teobaldo Ferraz 271, São Paulo, SP, 01140-070, Brazil
| | - Daniel Acosta-Avalos
- Centro Brasileiro de Pesquisas Físicas-CBPF, rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil.
| |
Collapse
|
2
|
Xing W, Hu H, Zhang Y, Zhao D, Wang W, Pan H, Zhang S, Yan L. Magnetotactic bacteria diversity of and magnetism contribution to sediment in Wudalianchi volcanic barrier lakes, NE China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 718:137348. [PMID: 32088486 DOI: 10.1016/j.scitotenv.2020.137348] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 02/02/2020] [Accepted: 02/14/2020] [Indexed: 06/10/2023]
Abstract
Magnetotactic bacteria (MTB), the members of sediment microorganisms, play an important role in geochemical iron-cycling and sediment magnetism. This study aimed to investigate the diversity and magnetism contribution of MTB in three volcanic barrier lakes with different waterbody types (open waterbody, YC; semi-enclosed waterbody, WB; and enclosed waterbody, YYP). High-throughput sequencing results showed that MTB affiliated to Alphaproteobacteria, Betaproteobacteria and Nitrospira distributed widely in these lakes. The genera of Magnetococcus (98.10%) and Candidatus Magnetoovum (1.47%) were endemic to YC and WB, respectively. The changes in frequency-dependent susceptibility (χfd) values before and after magnetic collection in YC, WB and YYP samples were - 0.28%, 0.05% and - 0.22%, respectively. The magnetic susceptibility was significantly associated with Chao1 (R2 = 0.637 to 0.763, p < .01) and Shannon index (R2 = 0.803 to 0.998, p < .01). The room- and low-temperature magnetic characteristics of sediment samples were analyzed by vibrating sample magnetometer (VSM) and radio-frequency superconducting quantum interference device (SQUID). Results indicated that the presence or absence of MTB could lead to the changes in the room- and low-temperature magnetism of volcanic lake sediments, which would extend our knowledge of MTB magnetism contribution to volcanic ecosystems.
Collapse
Affiliation(s)
- Weijia Xing
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Huixin Hu
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Yu Zhang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Dan Zhao
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Weidong Wang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China
| | - Hong Pan
- Institute of Volcano and Spring, Heilongjiang Academy of Science, Wudalianchi 164155, PR China
| | - Shuang Zhang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China.
| | - Lei Yan
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China; College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China.
| |
Collapse
|