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Plant Physiology 65:557-559 (1980) © 1980 American Society of Plant Biologists Lipopolysaccharide Composition of the Wilt Pathogen, Pseudomonas solanacearumCORRELATION WITH THE HYPERSENSITIVE RESPONSE IN TOBACCO 1Department of Plant Pathology, University of Wisconsin, Madison, Wisconsin 53706, 2 Department of Botany, University of Wisconsin, Madison, Wisconsin 53706
In the induction of the hypersensitive response (HR) in tobacco by Pseudomonas solanacearum, the recognition between host and pathogen is thought to involve an interaction between plant lectins and bacterial lipopolysaccharide (LPS). The LPS of a series of strains of P. solanacearum were examined to determine if there are structural differences that might account for the ability or inability of these strains to induce the hypersensitive response. Analysis of the components of LPS by gas chromatography indicates a clear difference in sugar composition between the HR-inducing and non-HR-inducing strains, especially in terms of the percentage of glucose, xylose and rhamnose. Sodium dodecyl sulfate polyacrylamide gel electrophoresis shows there are two distinct kinds of LPS, differing greatly in size, which correspond to rough and smooth LPS in other systems. In addition, a phage, CH154, was isolated which lyses non-HR-inducing bacteria and which is inactivated by LPS from these bacterial strains. Therefore, differences in LPS structure correlate strongly with host recognition of Pseudomonas solanacearum.
1 Supported in part by Rockefeller Foundation Grant 133-C500 and National Science Foundation Grant 144-K487 to L. S. and National Science Foundation National Needs Postdoctoral Fellowship to M. H. W. This article has been cited by other articles:
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