Disruption of N-acyl homoserine lactone-mediated cell signaling and iron acquisition in epiphytic bacteria by leaf surface compounds

Article Abstract:

Many plant species are examined to determine their production of leaf surface compounds that might interact with the N-acyl homoserine lactone (AHL)-mediated cell signaling systems. The stimulation of siderophore production and the growth inhibition by plant extracts and purified tannins are both reversed by addition of ferric chloride to culture media, which has indicated that iron is made unavailable by the compounds released onto the leaf surface.

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Functional analysis of Burkholderia cepacia genes bceD and bceF, encoding a phosphotyrosine phosphatase and a tyrosine autokinase, respectively: Role in exopolysaccharide biosynthesis and biofilm formation

Article Abstract:

The sequence analysis of a chromosomal region inside the bce gene cluster from the mucoid clinical isolate Burkholderia cepacia IST408 is presented. The size of the biofilm produced in vitro by bceD and bceF mutant strains is found to be smaller than the size of the biofilm formed by the parental strain, thus showing that BceD and BceF play a vital role in the establishment of biofilms of maximal size.

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Polydextrose, lactitol, and fructo-oligosaccharide fermentation by colonic bacteria in a three-stage continuous culture system

Article Abstract:

The potential prebiotic effects of polydextrose, lactitol monohydrate and fructo-oligosaccharide (FOS), commonly used components in the food industry, and the short-chain fatty acids (SCFA) produced during the fermentation were investigated. A decrease in difidobacteria throughout the model of the human colon was effected in the percent-G+C profiles.

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