quorum sensing


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quorum sensing

n.
A phenomenon in which a population of bacteria produces and responds to intercellular chemical signals whose concentration indicates the density of the population. When the density reaches a certain level, genes are expressed that allow for coordinated group behavior, as in bioluminescence or the formation of biofilms.
References in periodicals archive ?
Processes of biofilm formation, virulence factors production, and resistance to antimicrobials are regulated by the Quorum Sensing (QS) process, a bacterial communication system mediated by diffusible chemical signals called autoinducers (van Delden and Iglewski, 1998).
6) "Sponges provide an excellent model system for under-standing complex symbiosis and quorum sensing," says Hill.
Plants and bacteria have been identified that secrete chemicals which block quorum sensing.
Quorum sensing is a biochemical signalling process many microbial species use to control their metabolism according to environmental conditions.
A centralised database for use in studying bacterial biofilms and quorum sensing in food processing and other environments MicroBQs.
The discovery of bacterial-communication systems or quorum sensing systems, which orchestrate important temporal events during the infection process, has afforded a novel opportunity to ameliorate bacterial infection by means other than growth inhibition.
MUSCAT: Dr Sergey Dobretsov, assistant professor in the Department of Marine Sciences & Fisheries of the College of Agricultural and Marine Sciences at Sultan Qaboos University (SQU), demonstrated that many marine invertebrates and microorganisms in Oman are capable of producing inhibitors of "bacterial language" which are capable of hindering quorum sensing.
meningitidis reveals only two genes, luxR and luxS, coding for known molecules involved in quorum sensing or other prokaryotic cell-cell signaling pathways.
Via behaviors regulated by quorum sensing, bacteria play a significant role in determining what happens to carbon in the ocean: whether it sinks to the depths and is buried as detritus on the seafloor or converted into the greenhouse gas carbon dioxide and released back into the atmosphere.
This collection of thirty papers, which includes reports on potential topics of further research, covers projects on cell-to-cell signaling during development and DNA exchange (including new insights into pheromone control and response), cell-to-cell signaling in mutualistic and pathogenic associations with animals (including humans) and plants, the production and detection as well as the queuing of chemical signals (including a new look at secondary metabolites), and eukaryotic quorum sensing and interactions with quorum-sensing bacteria (including rotifers and fungi).
New topics and sections address biosensors, bio-control, bottled water, Enterobacter sakazakii, food sanitizers, milk, probiotics, proteobacteria, quorum sensing, and sigma factors.
Louis, MO) has patented DNA constructs and other compositions and methods for controlling gene expression in eukaryotic cells and organisms derived from bacterial quorum sensing systems.