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Reduced Efficiency of Magnetotaxis in Magnetotactic Coccoid Bacteria in Higher than Geomagnetic Fields

文献类型：期刊论文

作者Pan, Yongxin1; Lin, Wei1; Li, Jinhua1; Wu, Wenfang1; Tian, Lanxiang1; Deng, Chenglong2; Liu, Qingsong2; Zhu, Rixiang2; Winklhofer, Michael3; Petersen, Nikolai3
刊名BIOPHYSICAL JOURNAL
出版日期2009-08-19
卷号97期号:4页码:986-991
ISSN号0006-3495
DOI10.1016/j.bpj.2009.06.012
文献子类Article
英文摘要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.
WOS关键词MAGNETIC BACTERIA ; MAGNETOSOMES ; EQUATOR ; MOTION
WOS研究方向Biophysics
语种英语
WOS记录号WOS:000269112800008
出版者CELL PRESS
资助机构Chinese Academy of Sciences project ; Chinese Academy of Sciences project ; National Natural Science Foundation of China(40821091) ; National Natural Science Foundation of China(40821091) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1) ; Chinese Academy of Sciences project ; Chinese Academy of Sciences project ; National Natural Science Foundation of China(40821091) ; National Natural Science Foundation of China(40821091) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1) ; Chinese Academy of Sciences project ; Chinese Academy of Sciences project ; National Natural Science Foundation of China(40821091) ; National Natural Science Foundation of China(40821091) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1) ; Chinese Academy of Sciences project ; Chinese Academy of Sciences project ; National Natural Science Foundation of China(40821091) ; National Natural Science Foundation of China(40821091) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1) ; Deutsche Forschungsgerneinschaft(Wi-1828/4-1)
源URL[http://ir.iggcas.ac.cn/handle/132A11/70892]  
专题中国科学院地质与地球物理研究所
通讯作者Pan, Yongxin
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Biogeomagnetism Grp, Key Lab Earths Deep Interior, Beijing, Peoples R China
2.State Key Lab Lithospher Evolut, Beijing, Peoples R China
3.Univ Munich, Dept Earth & Environm Sci, Munich, Germany
推荐引用方式
GB/T 7714		 Pan, Yongxin,Lin, Wei,Li, Jinhua,et al. Reduced Efficiency of Magnetotaxis in Magnetotactic Coccoid Bacteria in Higher than Geomagnetic Fields[J]. BIOPHYSICAL JOURNAL,2009,97(4):986-991.
APA Pan, Yongxin.,Lin, Wei.,Li, Jinhua.,Wu, Wenfang.,Tian, Lanxiang.,...&Petersen, Nikolai.(2009).Reduced Efficiency of Magnetotaxis in Magnetotactic Coccoid Bacteria in Higher than Geomagnetic Fields.BIOPHYSICAL JOURNAL,97(4),986-991.
MLA Pan, Yongxin,et al."Reduced Efficiency of Magnetotaxis in Magnetotactic Coccoid Bacteria in Higher than Geomagnetic Fields".BIOPHYSICAL JOURNAL 97.4(2009):986-991.

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来源：地质与地球物理研究所

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