Repression of oxalic acid-mediated mineral phosphate solubilization in rhizospheric isolates of Klebsiella pneumoniae by succinate

Two strains of Klebsiella (SM6 and SM11) were isolated from rhizospheric soil that solubilized mineral phosphate by secretion of oxalic acid from glucose. Activities of enzymes for periplasmic glucose oxidation (glucose dehydrogenase) and glyoxylate shunt (isocitrate lyase and glyoxylate oxidase) re...

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Bibliographic Details
Published in:Archives of microbiology 2013-02, Vol.195 (2), p.81-88
Main Authors: Rajput, Mahendrapal Singh, Naresh Kumar, G., Rajkumar, Shalini
Format: Article
Language:English
Subjects:
Acid production
Biochemistry
Biomedical and Life Sciences
Biotechnology
Carbon
Cell Biology
Dehydrogenase
Dehydrogenases
Ecology
Enzymes
Genotype & phenotype
Glucose
Glucose 1-Dehydrogenase - metabolism
Glycerol
Glyoxylates - metabolism
Isocitrate Lyase - metabolism
Klebsiella pneumoniae
Klebsiella pneumoniae - drug effects
Klebsiella pneumoniae - metabolism
Life Sciences
Metabolism
Microbial Ecology
Microbiology
Microorganisms
Original Paper
Oxalic acid
Oxalic Acid - metabolism
Oxidation
Oxidoreductases - metabolism
Phosphates - metabolism
Plant growth
Rhizosphere
Soil Microbiology
Succinic Acid - pharmacology
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Summary:Two strains of Klebsiella (SM6 and SM11) were isolated from rhizospheric soil that solubilized mineral phosphate by secretion of oxalic acid from glucose. Activities of enzymes for periplasmic glucose oxidation (glucose dehydrogenase) and glyoxylate shunt (isocitrate lyase and glyoxylate oxidase) responsible for oxalic acid production were estimated. In presence of succinate, phosphate solubilization was completely inhibited, and the enzymes glucose dehydrogenase and glyoxylate oxidase were repressed. Significant activity of isocitrate lyase, the key enzyme for carbon flux through glyoxylate shunt and oxalic acid production during growth on glucose suggested that it could be inducible in nature, and its inhibition by succinate appeared to be similar to catabolite repression.
ISSN:0302-8933
1432-072X
DOI:10.1007/s00203-012-0850-x