By John R. Lawrence, D. R. Korber, G. M. Wolfaardt (auth.), J. Gwynfryn Jones (eds.)
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Extra info for Advances in Microbial Ecology
A series of phase-contrast photomicrographs showing the events resulting in the tightly packed microcolonies typical of P. fragi. m. 20 John R. Lawrence et al. SIDE VIEW ... - --- TOP VIEW _E FLOW AGGREGATING CELL ~ TIME Figure 7. Diagram of colony formation by Vibrio spp. Initial colony formation occurred via a packing maneuver followed by dispersion of some colony members. Migrating cells subsequently reattached at the sites of original microcolonies, aggregating preferentially at these locations.
These phenomena have been reviewed in detail by Kolenbrander (1989) and Kolen brander and London (1992). Observations of the growth and development of P. fragi microcolonies indicated that after onset of migration an extensive layer of vertically attached cells (a palisade layer) developed on the surface of the initial microcolonies (Fig. 11). This layer has also been observed in biofilms of P. , . \to.... ,. - • • ... . •. -" ". : 00 • • • It • • • D C Figure 11. Phase-contrast micrographs showing the development of the palisade layer on the surface of P.
Much of this interactive behavior results from the competition of cells for available resources, whether those resources be attachment sites or growth substrates. Higher organisms may also influence the outcome of microbial surface colonization, and events such as predatory grazing have the potential to limit the success of one strain while having relatively little effect on other community members. Few studies have focused on the effect of competitive pressure during the development of microbial biofilms.
Advances in Microbial Ecology by John R. Lawrence, D. R. Korber, G. M. Wolfaardt (auth.), J. Gwynfryn Jones (eds.)