Lins de Barros H G, Esquivel D M, Farina M
Museu de Astronomia e Ciencias Afins, Sao Cristovao, Rio de Janeiro, Brazil.
Sci Prog. 1990;74(295 Pt 3):347-59.
The ability of magnetotactic bacteria to orientate and navigate along geomagnetic lines is due to intracellular magnetic particles. These are enclosed within a membrane to form a magnetosome, a specialized organelle of magnetotactic organisms. The magnetic crystallite of many of the magnetotactic bacteria and algae is the iron oxide magnetite (Fe3O4) but recently a multicellular bacterial aggregate has been found to contain magnetic iron sulphide. Magnetotactic bacteria are found in regions of low oxygen pressure. Those of the Northern hemisphere are north-seeking while those of the Southern hemisphere are south-seeking. The opposite polarity of their internal magnets enables both types to travel to the deeper, less oxygenated, regions of their aqueous environments.
趋磁细菌沿着地磁线定向和导航的能力归因于细胞内的磁性颗粒。这些颗粒被包裹在一层膜内，形成磁小体，这是趋磁生物的一种特殊细胞器。许多趋磁细菌和藻类的磁性微晶是氧化铁磁铁矿（Fe3O4），但最近发现一种多细胞细菌聚集体含有磁性硫化铁。趋磁细菌存在于低氧压区域。北半球的趋磁细菌向北，而南半球的趋磁细菌向南。它们内部磁体的相反极性使这两种类型的趋磁细菌都能前往其水环境中更深、含氧量更低的区域。
