Biofilm Highlights by David G. Davies (auth.), Hans-Curt Flemming, Jost Wingender,
By David G. Davies (auth.), Hans-Curt Flemming, Jost Wingender, Ulrich Szewzyk (eds.)
Living in biofilms is the typical lifestyle of microorganisms, transiently immobilized of their matrix of extracellular polymeric ingredients (EPS), interacting in lots of methods and utilizing the matrix as an exterior digestion and safeguard procedure. this can be how they've got prepared their lifestyles within the surroundings, within the clinical context and in technical platforms – and has helped cause them to the oldest, such a lot profitable and ubiquitous type of lifestyles.
In this booklet, scorching spots in present biofilm study are offered in serious and infrequently provocative chapters. This serves a twofold objective: to supply an outline and to motivate additional discussions. peculiarly, the publication seeks to stimulate lateral thinking.
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Mol Microbiol 66:1459–1473 Hickman JW, Tifrea DF, Harwood CS (2005) A chemosensory system that regulates biofilm formation through modulation of cyclic diguanylate levels. Proc Natl Acad Sci USA 102:14422–14427 Hisatsuka K, Nakahara T, Sano N, Yamada K (1971) Formation of rhamnolipid by Pseudomonas aeruginosa and its function in hydrocarbon fermentation. 45 Ga coniform stromatolites in Warrawoona group, Western Australia. Geol Soc Am Bull 111:1256–1262 Huang T-P, Wong ACL (2007) A cyclic AMP receptor protein-regulated cell-cell communication system mediates expression of a FecA homologue in Stenotrophomonas maltophilia.
However, the findings given above clearly point to a role for c-di-GMP in the formation and maintenance of biofilms, with high levels of c-di-GMP being correlated with biofilm formation and low levels of c-di-GMP correlated with planktonic growth. Further work is required before we will understand the full story behind the relationship between EPS production, global carbon regulation, and biofilm dispersion. 6 Extracellular Inducers of Biofilm Dispersion The search for an extracellular signal responsible for biofilm dispersion has uncovered a range of factors that have been shown to stimulate biofilm disruption.
2003); that is, when cell densities markedly increase and nutrients become increasingly depleted. By enabling cooperation and synchronization, quorum sensing is thought to adjust the population response to changing environmental conditions and increase the fitness of dense bacterial assemblages in late logarithmic and early stationary phase (Keller and Surette 2006). 34 Fig. 5 Quorum sensing molecules: N-acyl homoserine lactones produced by Gram-negative bacteria C. Matz O R O NH O R = C1 bis C15 Predation and the necessity of defence exemplify one facet of the selective advantages in the evolution of bacterial cell-to-cell communication systems: in exponentially growing bacterial populations, predation is not an immediate threat (because bacterial growth rates are usually high enough to compensate for grazing losses) but grazing becomes a serious problem with the onset of nutrient depletion (stationary phase).