Combined Approaches for Characterization of an Uncultivated Magnetotactic coccus from Lake Miyun near Beijing
文献类型：期刊论文
| 作者 | Pan, Yongxin1; Lin, Wei1; Tian, Lanxiang1; Zhu, Rixiang1; Petersen, Nikolai2 |
| 刊名 | GEOMICROBIOLOGY JOURNAL
 |
| 出版日期 | 2009 |
| 卷号 | 26期号:5页码:313-320 |
| 关键词 | Bacteriodrome Lake Miyun Low-temperature Magnetic Measurement Magnetotactic Bacteria Transmission Electron Microscope |
| ISSN号 | 0149-0451 |
| DOI | 10.1080/01490450902748633 |
| 文献子类 | Article |
| 英文摘要 | This paper reports the features of an as yet uncultivated magnetotactic coccus, named MYC-1, recently found from surface sediments of Lake Miyun near Beijing. Light microscope and Bacteriodrome analyses demonstrate that MYC-1 is north-seeking in the Earth's magnetic field. Transmission electron microscope (TEM) attached with energy-dispersive X-ray analyses reveal that this coccus contains a single chain of magnetosomes, containing approximately 10 large iron-oxide crystals. Morphology of these crystals is featured by prism with a mean length and width of 117 nm and 95 nm (statistics from 281 crystals), respectively; it yields an aspect factor of 1.24. A linear relationship (r2 = 0.83) clearly exists between the length and width of crystals. In agreement with previous results, we observed that the size distribution of the MYC-1 is distinctly asymmetric with cut off toward larger sizes, which is the opposite of non-biogenic crystals. Low-temperature magnetic measurements on bulk bacteria samples show a distinct Verwey transition temperature (Tv) around 115 K indicative of magnetite, thus the magnetosomes contain magnetite. For a field of 0.5 mT, we determined a swimming speed of approximately 141 m/s for the MYC-1. Furthermore, the magnetic moment estimated from the rotating magnetic field method is 1.8 x 10-15 Am2 per cell. Finally, this finding of freshwater magnetotactic coccus in Lake Miyun suggests that magnetite produced by the MYC-1 strain is a potentially important remanence carrier in these lake sediments. |
| WOS关键词 | BACTERIAL MAGNETITE ; MAGNETOSOME FORMATION ; ELECTRON HOLOGRAPHY ; MICROSTRUCTURE ; IDENTIFICATION ; DISTRIBUTIONS ; MICROSCOPY ; SEDIMENTS ; SIZE |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000267098600001 |
| 出版者 | TAYLOR & FRANCIS INC |
| 资助机构 | CAS(KZCX-3-sw-150) ; CAS(KZCX-3-sw-150) ; NSFC(40325011 ; NSFC(40325011 ; 40821091) ; 40821091) ; CAS(KZCX-3-sw-150) ; CAS(KZCX-3-sw-150) ; NSFC(40325011 ; NSFC(40325011 ; 40821091) ; 40821091) ; CAS(KZCX-3-sw-150) ; CAS(KZCX-3-sw-150) ; NSFC(40325011 ; NSFC(40325011 ; 40821091) ; 40821091) ; CAS(KZCX-3-sw-150) ; CAS(KZCX-3-sw-150) ; NSFC(40325011 ; NSFC(40325011 ; 40821091) ; 40821091) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/71542]  |
| 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, Paleomagnetism & Geochronol Lab, Biogeomagnetism Grp,SKL LE, Beijing 100029, Peoples R China 2.Univ Munich, Dept Earth & Environm Sci, D-80333 Munich, Germany |
| 推荐引用方式 GB/T 7714 | Pan, Yongxin,Lin, Wei,Tian, Lanxiang,et al. Combined Approaches for Characterization of an Uncultivated Magnetotactic coccus from Lake Miyun near Beijing[J]. GEOMICROBIOLOGY JOURNAL,2009,26(5):313-320. |
| APA | Pan, Yongxin,Lin, Wei,Tian, Lanxiang,Zhu, Rixiang,&Petersen, Nikolai.(2009).Combined Approaches for Characterization of an Uncultivated Magnetotactic coccus from Lake Miyun near Beijing.GEOMICROBIOLOGY JOURNAL,26(5),313-320. |
| MLA | Pan, Yongxin,et al."Combined Approaches for Characterization of an Uncultivated Magnetotactic coccus from Lake Miyun near Beijing".GEOMICROBIOLOGY JOURNAL 26.5(2009):313-320. |
入库方式： OAI收割
来源：地质与地球物理研究所
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