Magnetoreception in multicellular magnetotactic prokaryotes: a new analysis of escape motility trajectories in different
- PDF / 1,298,682 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 32 Downloads / 133 Views
ORIGINAL ARTICLE
Magnetoreception in multicellular magnetotactic prokaryotes: a new analysis of escape motility trajectories in different magnetic fields Ana Gabriela Veiga Sepulchro1 · Henrique Lins de Barros2 · Henrique Oliveira Leiras de Mota3 · Karen Shiroiva Berbereia4 · Katterine Patricia Taipe Huamani5 · Lis Carneiro da Silva Lopes3 · Vitor Sudbrack6 · Daniel Acosta‑Avalos2 Received: 3 July 2020 / Revised: 27 August 2020 / Accepted: 28 September 2020 © European Biophysical Societies’ Association 2020
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. Keywords Escape motility · Magnetotaxis · Magnetoreception · Multicellular magnetotactic prokaryote
* Daniel Acosta‑Avalos [email protected] 1
Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador São‑carlense 400, São Carlos, SP 13566‑590, Brazil
2
Centro Brasileiro de Pesquisas Físicas-CBPF, rua Xavier Sigaud 150, Urca, Rio de Janeiro, RJ 22290‑180, Brazil
3
Departamento de Física, Centro de Ciências Exatas, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n‑Bela Vista, Viçosa, MG, Brazil
4
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
5
Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos (UNMSM), calle Germán Amézaga 375, Cuidad Universitaria, Lima 1, Perú
6
Instituto de Física Teórica, Universidade Estadual Paulista Julio de Mesquita Filho (IFT/UNESP), Rua Dr T
Data Loading...
