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Structure, Behavior, Ecology and Diversity of Multicellular Magnetotactic Prokaryotes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Keim, Carolina N. Martins, Juliana Lopes Barros, Henrique Lins De Lins, Ulysses Farina, Marcos |
| Copyright Year | 2006 |
| Abstract | Multicellular magnetotactic prokaryotes (MMPs) show a spherical morphology and are composed of 15–45 cells organized around an internal acellular compartment. Each cell presents a pyramidal shape with the apex of the pyramid facing this compartment The base, where the flagella are attached, faces the environment. MMPs display either a straight or a helical trajectory, and the sense of rotation of the trajectory (clockwise) is the same as the rotation of the microorganism's body during swimming. This is different to what would be expected if the flagella formed a bundle. The fact that MMPs present non-uniform velocities during “ping-pong movement” or “escape motility” further confirms the need for complex coordination of the action of flagella. The organisms express an unusual life cycle. Each organism grows by enlarging the cell volume, not the cell number; then, the number of cells doubles, the organism elongates, then it becomes eight-shaped, and finally splits into two equal spherical organisms. Most multicellular magnetotactic prokaryotes produce greigite (Fe3S4) magnetosomes, whereas recent observations show that these organisms can also biomineralize magnetite (Fe3O4). All data available on MMPs indicate that they constitute an important model for studies on multicellularity, biomineralization, and evolution in prokaryotes. |
| Starting Page | 103 |
| Ending Page | 132 |
| Page Count | 30 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/7171_040 |
| Alternate Webpage(s) | http://cbpfindex.cbpf.br/publication_pdfs/MM040.2006_12_21_11_46_47.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/7171_040 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
