How light affect the magnetotactic behavior and reproduction of ellipsoidal multicellular magnetoglobules?
文献类型：CNKI期刊论文
| 作者 | Xinxin QIAN; Yicong ZHAO; Claire-Lise SANTINI; Hongmiao PAN; Tian XIAO; Haitao CHEN; Tao SONG; Jinhua LI; Francois ALBERTO; Sophie BRUSTLEIN |
| 发表日期 | 2021-11-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | photo-response magnetic alignment coordinated swimming |
| 英文摘要 | Magnetotactic bacteria(MTB) synthesize intracellular magnetic organelles, magnetosomes,which consist of magnetic crystals that are enveloped in a membrane.Magnetosomes are organized into a chain(s) and confer on cells a magnetic dipolar moment.This magnetic property allows MTB cells to align and swim along geomagnetic field lines,a movement referred to as magnetotaxis.Some MTB species change their swim direction in response to illumination by UV violet and blue light.Here we analyzed the polarity of morphology,magnetism,and motion in Mediterranean multicellular magnetotactic prokaryotes,also called,magnetoglobules or MMP.The magnetoglobules were assembled from 60-80 cells into an asymmetric ellipsoidal morphology with a relative narrow and large end.They swam dominantly northward,parallel to the direction of the magnetic field,with the narrow-end as the leading side.In response to a reversal in the direction of the magnetic field,they aligned quickly along the magnetic field lines and kept swimming northward.Interestingly,under constant illumination,385-nm UV light,magnetoglobules changed their swimming direction southward anti-parallel to the direction of the magnetic field,with the large-end as the leading side.The change from a northward to southward direction occurred along with an increase of swimming speed.A minimum of 35-mW/cm~2 irradiance of UV light was suficient to trigger the swimming re-orientation.UV radiation also triggered the unidirectional division of magnetoglobules.Together these results revealed a coordination of the polarity of magnetoglobule morphology,magnetic moment,and swimming orientation,in response to magnetic and optical stimuli.The UV triggered the reversal of magnetotaxis and magneto globule division indicating the ecological significance of light for multicellular magnetotactic prokaryotes. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the Excellence Initiative of Aix-Marseille University—A*Midex,a French "Investissements d'Avenir" programme ; the National Key Research and Development Program of China (No.2018YF C0309904) ; the National Natural Science Foundation of China (No.41920104009) ; grants from French CNRS for LIA-MagMC |
| 卷 | v.39期:06页:7-16 |
| 语种 | 英文; |
| 分类号 | Q64 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187598]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofEarthandPlanetaryPhysics,InstituteofGeologyandGeophysics,ChineseAcademyofSciences 2.AixMarseilleUniversity 3.StateKeyLaboratoryofMicrobialResources,InstituteofMicrobiology,ChineseAcademyofSciences 4.AixMarseilleUniversity,CNRS,LCB,Centuri,IM2B,IMM 5.InternationalAssociatedLaboratoryofEvolutionandDevelopmentofMagnetotacticMulticellularOrganisms(LIA-MagMC),CNRS-CAS 6.CASKeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanology,ChineseAcademyofSciences 7.InstituteofElectricalEngineering,ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Xinxin QIAN,Yicong ZHAO,Claire-Lise SANTINI,et al. How light affect the magnetotactic behavior and reproduction of ellipsoidal multicellular magnetoglobules?. 2021. |
入库方式： OAI收割
来源：海洋研究所
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