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. 1985 Jan;77(1):35–42. doi: 10.1104/pp.77.1.35

Agrobacterium tumefaciens Interaction with Suspension-Cultured Tomato Cells 1

Nicola T Neff 1, Andrew N Binns 1
PMCID: PMC1064452  PMID: 16664024

Abstract

Adherence of Agrobacterium tumefaciens to suspension-cultured tomato cells has been characterized using a quantitative binding assay. Saturable binding of radiolabeled A. tumefaciens to plant cells resulted in 100 to 300 bacteria bound per cell. Specificity of A. tumefaciens binding was also inferred from two additional results: (a) an initial incubation of plant cells with A. tumefaciens reduced subsequent binding of radiolabeled A. tumefaciens by 60% to 75%; (b) tomato cells bound less than three E. coli per cell. Protease treatment of plant cells had no effect on subsequent bacterial binding, but prior treatment of plant cells with pectinolytic enzymes increased binding 2- to 3-fold. Pectin-enriched and neutral polymer-enriched fractions were obtained from tomato cell walls. The soluble pectin-enriched fraction inhibited binding of bacteria to plant cells by 85% to 95%, whereas the neutral polymer fraction only partially inhibited binding. Preliminary characterization of the activity showed it is heat stable, partially inactivated by protease treatment, and substantially inactivated by acid hydrolysis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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