학술논문
Regulation of biofilm formation by Pseudomonas chlororaphis in an in vitro system.
Document Type
Article
Author
Source
Subject
*BIOFILMS
*PSEUDOMONAS
*IN vitro studies
*AZITHROMYCIN
*PHYSIOLOGY
ENVIRONMENTAL aspects
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Language
ISSN
0026-2617
Abstract
The mutants of Pseudomonas chlororaphis 449 with completely or partially suppressed accumulation of N-acyl homoserine lactones exhibited the absence or a pronounced decrease of their capacity for stimulation of biofilm growth in the presence of azithromycin. Biofilms of the wild type strain preformed in the presence of the stimulatory azithromycin concentrations exhibited more intense staining with a polysaccharide-specific dye 1,9dimethyl methylene blue (DMMB) and were more resistant to heat shock. These findings indicate accumulation of the structural matrix polysaccharides, which play a protective role under conditions of thermal shock. Extremely low azithromycin concentrations (0.001-0.01 μg/mL) inhibit biofilm formation by P. chlororaphis 449 and P. chlororaphis 66 with suppression of the synthesis of DMMBstaining polysaccharides. [ABSTRACT FROM AUTHOR]