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Role of LPS in Recognition and Induced Disease Resistance in Plant Hosts of Pseudomonas solanacearum

  • T. L. Graham

Abstract

Nearly all confirmed bacterial plant pathogens are gram-negative organisms, all of which produce some form of cell wall lipopolysaccharide (LPS). Moreover, most successful pathogens or symbionts also produce an extracellular polysaccharide (EPS). With bacterial pathogens (e.g., Pseudomonas, Xanthomonas, Erwinia, etc.) the EPS often appear as a loosely associated slime layer, whereas with bacterial symbionts (e.g., Rhizobi-um) the EPS often appear as organized capsules extending some distance from the cell surface. When one considers the most initial events in recognition between the plant cell and a colonizing bacterium, the surface LPS and EPS of the bacterium are obviously tempting molecules to consider as candidates for the initial molecular triggers of the cascade of responses between host and microbe that result either in successful invasion (symbiotic or “compatible” pathogenic reactions) or in rejection (nonsymbiotic, nonpathogenic or “incompatible” pathogenic reactions).

Keywords

Hypersensitive Reaction Tissue Resistance Host Cell Wall Avirulent Isolate Bacterial Plant Pathogen 
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

© Plenum Press, New York 1983

Authors and Affiliations

  • T. L. Graham
    • 1
  1. 1.Monsanto Agricultural Products Co.St. LouisUSA

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