| Abstract: | Myxobacteria are social organisms that usually remain together even though they are not chemically attached to each other. They cooperatively feed and form aggregates and fruiting bodies. Their mode of movement, the forces and mechanisms that allow movement, the factors that keep them together, and the processes leading to the structures composed of many cells are only now beginning to be understood. Possibilities that may be key to their abilities are three models proposed elsewhere for different aspects of their biology. One hypothesis attempts to explain mound and fruiting body formation by assuming that the cells move in circular patterns around the major cell mass. The second explains gliding motility on the existence of shunts that periodically short out the proton gradient across the cell membrane, causing expansion and contraction of portions of the cell. The third model proposes that occasionally cells arise that move unidirectional instead of back and forth. These few cells may lead the majority of cells in new directions. BioEssays 20:1030–1038, 1998. © 1998 John Wiley & Sons, Inc. |
