Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/13153
Tipo: Artigo
Título: Lack of AHL-based quorum sensing in Pseudomonas fluorescens isolated from milk
Autor(es): Vanetti, Maria C.D.
Martins, Maurilio L.
Pinto, Uelinton, M.
Riedel, Kathrin
Mantovani, Hilário C.
Araújo, Elza F. de
Abstract: Numerous bacteria coordinate gene expression in response to small signalling molecules in many cases known as acylhomoserine lactones (AHLs), which accumulate as a function of cell density in a process known as quorum sensing. This work aimed to determine if phenotypes that are important to define microbial activity in foods such as biofilm formation, swarming motility and proteolytic activity of two Pseudomonas fluorescens strains, isolated from refrigerated raw milk, are influenced by AHL molecules. The tested P. fluorescens strains did not produce AHL molecules in none of the evaluated media. We found that biofilm formation was dependent on the culture media, but it was not influenced by AHLs. Our results indicate that biofilm formation, swarming motility and proteolytic activity of the tested P. fluorescens strains are not regulated by acyl-homoserine lactones. It is likely that AHL-dependent quorum sensing system is absent from these strains
Palavras-chave: Milk
Pseudomonas fluorescens
Biofilm formation
Quorum sensing
Quorum quenching
Editor: Brazilian Journal of Microbiology
Tipo de Acesso: Open Acess
URI: http://dx.doi.org/10.1590/S1517-83822014000300037
http://www.locus.ufv.br/handle/123456789/13153
Data do documento: 9-Out-2014
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