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The ultrastructure of a marine luminous bacterium
An electron microscope study of normal and L-forms of a marine luminous bacterium was carried out. In addition to the features found normally in Gram-negative bacilli, observed in cells from solid medium, cells from actively luminescent liquid culture were found to possess certain peculiar features....
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| Format: | Thesis |
| Language: | English |
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Department of Molecular and Cell Biology
2016
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| _version_ | 1867613179821948928 |
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| access_status_str | Open Access |
| author | Williams, Ernest Donald Frederick |
| author2 | Lütjeharms, W J |
| author_browse | Lütjeharms, W J Williams, Ernest Donald Frederick |
| author_facet | Lütjeharms, W J Williams, Ernest Donald Frederick |
| author_sort | Williams, Ernest Donald Frederick |
| collection | Thesis |
| description | An electron microscope study of normal and L-forms of a marine luminous bacterium was carried out. In addition to the features found normally in Gram-negative bacilli, observed in cells from solid medium, cells from actively luminescent liquid culture were found to possess certain peculiar features. The most notable of these were tetrads, cells in which ingrowth of the cytoplasmic membrane causes the contents to be divided up into four protoplasts within the cell wall. Small cytoplasmic spherules which arise from the cytoplasmic membrane were also seen to occur. The cell walls which were three-layered and typical of Gram-negative bacteria often had blebs on the surface. The cytoplasmic membrane, typical of a 7.5 nm unit biological membrane in appearance in normal cells seemed to be composed of a number of laminations in some L-form cells. These laminations consisting of alternate dark and light bands may consist of numbers of unit membranes with adjacent protein layers fused. The occurrence of L-form cells was shown to be associated with luminescence and aeration in liquid sea-water medium. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/18065 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:00.945Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Molecular and Cell Biology |
| publisherStr | Department of Molecular and Cell Biology |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/18065 The ultrastructure of a marine luminous bacterium Williams, Ernest Donald Frederick Lütjeharms, W J Microbiology An electron microscope study of normal and L-forms of a marine luminous bacterium was carried out. In addition to the features found normally in Gram-negative bacilli, observed in cells from solid medium, cells from actively luminescent liquid culture were found to possess certain peculiar features. The most notable of these were tetrads, cells in which ingrowth of the cytoplasmic membrane causes the contents to be divided up into four protoplasts within the cell wall. Small cytoplasmic spherules which arise from the cytoplasmic membrane were also seen to occur. The cell walls which were three-layered and typical of Gram-negative bacteria often had blebs on the surface. The cytoplasmic membrane, typical of a 7.5 nm unit biological membrane in appearance in normal cells seemed to be composed of a number of laminations in some L-form cells. These laminations consisting of alternate dark and light bands may consist of numbers of unit membranes with adjacent protein layers fused. The occurrence of L-form cells was shown to be associated with luminescence and aeration in liquid sea-water medium. 2016-03-21T19:14:17Z 2016-03-21T19:14:17Z 1970 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/18065 eng application/pdf Department of Molecular and Cell Biology Faculty of Science University of Cape Town |
| spellingShingle | Microbiology Williams, Ernest Donald Frederick The ultrastructure of a marine luminous bacterium |
| thesis_degree_str | Doctoral |
| title | The ultrastructure of a marine luminous bacterium |
| title_full | The ultrastructure of a marine luminous bacterium |
| title_fullStr | The ultrastructure of a marine luminous bacterium |
| title_full_unstemmed | The ultrastructure of a marine luminous bacterium |
| title_short | The ultrastructure of a marine luminous bacterium |
| title_sort | ultrastructure of a marine luminous bacterium |
| topic | Microbiology |
| url | http://hdl.handle.net/11427/18065 |
| work_keys_str_mv | AT williamsernestdonaldfrederick theultrastructureofamarineluminousbacterium AT williamsernestdonaldfrederick ultrastructureofamarineluminousbacterium |