Possible biological roles for Rhizobium leguminosarum extracellular polysaccharide and cyclic glucans in bacteria-plant interactions for nitrogen-fixing bacteria

The extracellular polysaccharide (EPS) secreted by Rhizobium leguminosarum forms an aqueous solution. Addition of electrolyte can lead to the formation of transparent thermoreversible gels. A non-specific role for EPS gelation in the initial attachment of the bacteria to plant material is suggested....

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Published inFood hydrocolloids Vol. 5; no. 1; pp. 185 - 188
Main Authors Morris, V.J., Brownsey, G.J., Chilvers, G.R., Harris, J.E., Gunning, A.P., Stevens, B.H.J.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 1991
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Summary:The extracellular polysaccharide (EPS) secreted by Rhizobium leguminosarum forms an aqueous solution. Addition of electrolyte can lead to the formation of transparent thermoreversible gels. A non-specific role for EPS gelation in the initial attachment of the bacteria to plant material is suggested. Techniques have been developed for the preparation of cyclic glucans from EPS − R.leguminosarum. The preparation, purification and characterization of ring sizes will be described. Evidence will be presented that cyclic glucans solubilize naringenin, a flavonoid known to induce nodulation genes. A biological role for cyclic glucans in accumulating naringenin is proposed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0268-005X
1873-7137
DOI:10.1016/S0268-005X(09)80312-3