Requirement for chemotaxis in pathogenicity of Agrobacterium tumefaciens on roots of soil-grown pea plants.

M. C. Hawes, L. Y. Smith

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Abstract

Agrobacterium tumefaciens Tn5 mutants deficient in chemotaxis to root exudates were used to study the significance of chemotaxis in crown gall pathogenesis. Mutants deficient in motility and in chemotaxis were fully virulent when inoculated by direct immersion in inoculum, followed by growth for 2 weeks in moist growth pouches. Ability of mutant bacteria to move through soil to infect roots was tested by planting wounded seedlings into air-dried soil or sand that had been infested with inoculum. Mutant bacteria were almost as virulent as the parent on plants grown in sand but were avirulent on soil-grown plants.

Original languageEnglish (US)
Pages (from-to)5668-5671
Number of pages4
JournalJournal of bacteriology
Volume171
Issue number10
DOIs
StatePublished - Oct 1989

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ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology

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