Abstract
Genes for phytotoxin production have been identified and cloned from several phytopathogenic pseudomonads. These genes comprise physically linked clusters that have been located both on the chromosome and on endogenous plasmids. Contained within these genetic regions are resistance genes specific to those toxins that have a bactericidal component to their activity. DNA sequences required for toxin production are often conserved among bacteria with divergent host specificities, suggesting the ability of toxin genes to be transferred between bacteria. Toxins are usually modulators of plant pathogenicity, their production causing a significant increase in disease severity. In one case, however, toxin production appears to be a major contributor to the basic pathogenicity of a plant pathogenic bacterium.
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Willis, D.K., Barta, T.M. & Kinscherf, T.G. Genetics of toxin production and resistance in phytopathogenic bacteria. Experientia 47, 765–771 (1991). https://doi.org/10.1007/BF01922455
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DOI: https://doi.org/10.1007/BF01922455