Article (Scientific journals)
Fluorescent Pseudomonas mainly produce the dihydro form of pyoverdine at low specific growth rate.
Jacques, Philippe; Ongena, MARC; Bernard, F. et al.
2003In Letters in Applied Microbiology, 36 (5), p. 259-62
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Keywords :
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
Abstract :
[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.
Disciplines :
Microbiology
Author, co-author :
Jacques, Philippe 
Ongena, MARC ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Bernard, F.
Fuchs, R.
Budzikiewicz, H.
Thonart, Philippe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech - Biochimie et microbiologie industrielles
Language :
English
Title :
Fluorescent Pseudomonas mainly produce the dihydro form of pyoverdine at low specific growth rate.
Publication date :
2003
Journal title :
Letters in Applied Microbiology
ISSN :
0266-8254
eISSN :
1472-765X
Publisher :
Blackwell Publishing
Volume :
36
Issue :
5
Pages :
259-62
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 December 2009

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