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The Role of Microbial Surface Polysaccharides in the Rhizobium-Legume Interaction

  • Karsten Niehaus
  • Anke Becker
Part of the Subcellular Biochemistry book series (SCBI, volume 29)

Abstract

The symbiotic interaction between the soil bacteria classified as Rhizobium or Bradyrhizobium and members of the plant family Leguminosae enables the study of cell-to-cell recognition, signal exchange, and induced morphogenesis. Rhizobia are able to enter the plant root via a sophisticated infection mechanism, induce a new plant organ, the root nodule, and differentiate within the infected plant cells into nitrogen-fixing bacteroids which have properties of an endosymbiont (Hirsch, 1992). The establishment of this symbiosis is controlled by a complex network of signals which are produced by both the bacteria and the plant. In this review we would like to draw attention to the role and functions of rhizobial surface carbohydrates during the establishment of the symbiosis. Rhizobial cells are able to synthesize several surface carbohydrates: lipopolysaccharides (LPS) bound to the outer membrane of the cell, capsular polysaccharides (CPS) and 3-deoxy-D-manno-2-octulosonic acid (KDO)-rich polysaccharides (KPS) associated with the cell surface, and exopolysaccharides (EPS) secreted to the medium.

Keywords

Root Hair Capsular Polysaccharide Nodulation Factor Rhizobium Leguminosarum Infection Thread 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Karsten Niehaus
    • 1
  • Anke Becker
    • 1
  1. 1.Lehrstuhl für Genetik, Fakultät für BiologieUniversität BielefeldBielefeldGermany

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