ULTRASTRUCTURE OF A MAGNETOTACTIC SPIRILLUM
ULTRASTRUCTURE OF A MAGNETOTACTIC SPIRILLUM
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DOI：
10.1128/jb.141.3.1399-1408.1980
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发表时间：
1980-01-01
影响因子：
3.2
通讯作者：
BLAKEMORE, RP
中科院分区：
文献类型：
--
作者：
BALKWILL, DL;MARATEA, D;BLAKEMORE, RP
用透射电镜、扫描电镜和扫描-透射电镜观察了趋磁细菌MS-1的超微结构。该生物体在一般细胞形态上类似于其他的阿氏藻，尽管在超微结构水平上检测到了一些差异。电子致密颗粒内的趋磁细胞被示出的能量色散X射线分析是本地化含铁。菌株MS-1的非趋磁变体缺乏这些新的细菌包涵体。这些颗粒的链以特定的排列方式穿过每个趋磁细胞，这种排列方式在细胞与细胞之间是一致的，似乎与细胞质膜的内表面有关。每个颗粒被电子致密层包围，电子致密层通过电子透明区域与颗粒表面分离。磁小体一词是指在这种细菌和其他趋磁细菌中发现的电子致密颗粒及其包膜层。
The ultrastructure of a magnetotactic bacterium (strain MS-1) was examined by transmission, scanning and scanning-transmission electron microscopy. The organism resembled other spirilla in general cell morphology, although some differences were detected at the ultrastructural level. Electron-dense particles within magnetotactic cells were shown by energy-dispersive X-ray analysis to be localizations containing Fe. A nonmagnetotactic variant of strain MS-1 lacked these novel bacterial inclusion bodies. A chain of these particles traversed each magnetotactic cell in a specific arrangement that was consistent from cell to cell, seemingly associated with the inner surface of the cytoplasmic membrane. Each particle was surrounded by an electron-dense layer separated from the particle surface by an electron-transparent region. The term magnetosome is proposed for the electron-dense particles with their enveloping layer(s) as found in this and other magnetotactic bacteria.