| Texto completo | |
| Autor(es): |
Sepulchro, Ana Gabriela Veiga
[1]
;
de Barros, Henrique Lins
[2]
;
de Mota, Henrique Oliveira Leiras
[3]
;
Berbereia, Karen Shiroiva
[4]
;
Huamani, Katterine Patricia Taipe
[5]
;
Lopes, Lis Carneiro da Silva
[3]
;
Sudbrack, Vitor
[6]
;
Acosta-Avalos, Daniel
[2]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Fis Sao Carlos, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
[2] Urca, CBPF, Rua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ - Brazil
[3] Univ Fed Vicosa, Ctr Ciencias Exatas, Dept Fis, Ave Peter Henry Rolfs S-N Bela Vista, Vicosa, MG - Brazil
[4] Univ Fed Juiz de Fora, Inst Ciencias Exatas, Dept Fis, Campus Univ UFJF, Rua Jose Lourenco Kelmer S-N, BR-36036900 Juiz De Fora, MG - Brazil
[5] UNMSM, Fac Ciencias Fis, Calle German Amezaga 375, Cuidad Univ, Lima 1 - Peru
[6] Univ Estadual Paulista Julio de Mesquita UNESP, IFT, Rua Dr Teobaldo Ferraz 271, BR-01140070 Sao Paulo, SP - Brazil
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS; v. 49, n. 7, p. 609-617, OCT 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
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 isCandidatusMagnetoglobus multicellularis. Several studies have shown thatCa.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 ofCa.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. (AU) | |
| Processo FAPESP: | 18/23984-0 - Dinâmica de populações em regiões altamente fragmentadas |
| Beneficiário: | Vítor de Oliveira Sudbrack |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |