Evidence for the production of chemical compounds analogous to nod factor by the silicate bacterium Bacillus circulans GY92

Silicate bacteria are generally placed in the species Bacillus circulans and are widely used in biological fertilisers and biological leaching. The bacteria can form conspicuous amounts of extracellular polysaccharides in nitrogen-free media or in the presence of substrates with large C/N ratios. Us...

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Bibliographic Details
Published in:Microbiological research 2001, Vol.156 (3), p.289-292
Main Authors: Lian, B., Prithiviraj, B., Souleimanov, A., Smith, D.L.
Format: Article
Language:English
Subjects:
Bacillus - metabolism
Bacillus circulans
Bacteriology
Biological and medical sciences
Bradyrhizobium - metabolism
Chromatography, High Pressure Liquid
Fundamental and applied biological sciences. Psychology
lipo-chitooligosaccharides
lipochitooligosaccharides
Lipopolysaccharides - biosynthesis
Lipopolysaccharides - chemistry
Lipopolysaccharides - isolation & purification
Metabolism. Enzymes
Microbiology
Nitrogen Fixation
Pathogenicity, virulence, toxins, bacteriocins, pyrogens, host-bacteria relations, miscellaneous strains
plant growth-promoting rhizobacteria
Polysaccharides, Bacterial - biosynthesis
Polysaccharides, Bacterial - isolation & purification
signal molecules
Signal Transduction
silicate bacteria
Silicates
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Summary:Silicate bacteria are generally placed in the species Bacillus circulans and are widely used in biological fertilisers and biological leaching. The bacteria can form conspicuous amounts of extracellular polysaccharides in nitrogen-free media or in the presence of substrates with large C/N ratios. Using high performance liquid chromatography, we have shown that B. circulans produced a new peak/compound when induced with the plant-to-bacteria signal molecule genistein. This material co-eluted with the lipo-chitooligosaccharide (Nod Bj-V (C18:1, MeFuc)) of Bradyrhizobium japonicum. This compound exhibited root hair deformation activity on soybean, which is characteristic of lipo-chitooligosaccharides (LCOs). We propose that this might be an LCO or closely related compound with similar biological activity.
ISSN:0944-5013
1618-0623
DOI:10.1078/0944-5013-00107