ISSN:
1572-8773
Keywords:
iron uptake
;
mugineic acid
;
phytosiderophore
;
Pseudomonas putida
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract The phytosiderophore mugineic acid (MA) was studied as a source of iron for rhizosphere fluorescent pseudomonads. 55Fe supplied as Fe-MA was taken up by Pseudomonas putida WCS358, B10 and St3 grown under iron deficient conditions. The uptake decreased when the bacteria were grown in the presence of iron. However, no differences in uptake were observed when a siderophore deficient mutant was tested. Since ligand exchange between pseudobactin and MA was shown to occur rapidly with a half-life of 2 h, MA mediated iron uptake probably proceeds through this indirect mechanism. The ecological implications of these findings are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00140113