Reference : Fluorescent Pseudomonas mainly produce the dihydro form of pyoverdine at low specific...
Scientific journals : Article
Life sciences : Microbiology
http://hdl.handle.net/2268/31530
Fluorescent Pseudomonas mainly produce the dihydro form of pyoverdine at low specific growth rate.
English
Jacques, P. [> > > >]
Ongena, MARC mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Bernard, F. [> > > >]
Fuchs, R. [> > > >]
Budzikiewicz, H. [> > > >]
Thonart, Philippe mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech - Biochimie et microbiologie industrielles >]
2003
Letters in Applied Microbiology
Blackwell Publishing
36
5
259-62
Yes (verified by ORBi)
International
0266-8254
1472-765X
[en] Biomass ; Fermentation ; Fluorescence ; Oligopeptides ; Pigments, Biological/biosynthesis/chemistry/metabolism ; Pseudomonas/chemistry/growth & development/metabolism ; Pseudomonas aeruginosa/growth & development/metabolism ; Pseudomonas fluorescens/growth & development/metabolism ; Pseudomonas putida/growth & development/metabolism
[en] AIMS: To analyse the influence of cell growth rate and iron concentration on the production of pyoverdines (PVDs) and of their reduced dihydro forms by three fluorescent Pseudomonas strains (P. putida BTP16, P. fluorescens BTP7 and P. aeruginosa 7NSK2). METHODS: PVD and dihydropyoverdine (DHPVD) productions were determined by LC ESI-MS and spectrophotometry during batch and chemostat culture at different dilution rates. SIGNIFICANCE: The relatively high PVD-to-DHPVD ratio (0.57) observed in pH-controlled batch cultures suggested that a base-catalysed chemical oxidation of the dihydroform is not the prime mechanism involved in generating PVDs. Interestingly, in chemostat cultures the PVD-to-DHPVD ratio was significantly reduced at low specific growth rate. Our results suggest that the oxidation of DHPVD to PVD is catalysed by an iron-dependent enzymatic reaction rather than a chemical oxidation.
http://hdl.handle.net/2268/31530

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