Diese Seite ist aus Gründen der Barrierefreiheit optimiert für aktuelle Browser. Sollten Sie einen älteren Browser verwenden, kann es zu Einschränkungen der Darstellung und Benutzbarkeit der Website kommen!
Geophysics Homepage
Search:
Log in
print

Reduced efficiency of magnetotaxis in magnetotactic coccoid bacteria in higher than geomagnetic fields

Pan, Yongxin, Wei Lin, Jinhua Li, Wenfang Wu, Lanxiang Tian, Chenglong Deng, Qingsong Liu, Rixiang Zhu, Michael Winklhofer, and Nikolai Petersen (2009), Reduced efficiency of magnetotaxis in magnetotactic coccoid bacteria in higher than geomagnetic fields, Biophys. J., 97(4), 986 - 991, doi:10.1016/j.bpj.2009.06.012.

Abstract
Magnetotactic bacteria are microorganisms that orient and migrate along magnetic field lines.
The classical model of polar magnetotaxis predicts that the field-parallel migration velocity of
magnetotactic bacteria increases monotonically with the strength of an applied magnetic field.
We here test this model experimentally on magnetotactic coccoid bacteria that swim along
helical trajectories. It turns out that the contribution of the field-parallel migration velocity
decreases with increasing field strength from 0.1 to 1.5 mT. This unexpected observation can
be explained and reproduced in a mathematical model under the assumption that the
magnetosome chain is inclined with respect to the flagellar propulsion axis. The magnetic
disadvantage, however, becomes apparent only in stronger than geomagnetic fields, which
suggests that magnetotaxis is optimized under geomagnetic field conditions. It is therefore not
beneficial for these bacteria to increase their intracellular magnetic dipole moment beyond the
value needed to overcome Brownian motion in geomagnetic field conditions.
BibTeX
@article{id1401,
  author = {Yongxin Pan and Wei Lin and Jinhua Li and Wenfang Wu and Lanxiang Tian and Chenglong Deng and Qingsong Liu and Rixiang Zhu and Michael Winklhofer and Nikolai Petersen},
  journal = {Biophys. J.},
  month = {aug},
  number = {4},
  pages = {986 - 991},
  title = {{Reduced efficiency of magnetotaxis in magnetotactic coccoid bacteria in higher than geomagnetic fields}},
  volume = {97},
  year = {2009},
  doi = {10.1016/j.bpj.2009.06.012},
}
EndNote
%0 Journal Article
%A Pan, Yongxin
%A Lin, Wei
%A Li, Jinhua
%A Wu, Wenfang
%A Tian, Lanxiang
%A Deng, Chenglong
%A Liu, Qingsong
%A Zhu, Rixiang
%A Winklhofer, Michael
%A Petersen, Nikolai
%D 2009
%N 4
%V 97
%J Biophys. J.
%P 986 - 991
%T Reduced efficiency of magnetotaxis in magnetotactic coccoid bacteria in higher than geomagnetic fields
%8 aug
ImprintPrivacy PolicyContact
Printed 06. Dec 2019 01:39