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. 1989 Sep;91(1):113–118. doi: 10.1104/pp.91.1.113

Variation in Binding and Virulence of Agrobacterium tumefaciens Chromosomal Virulence (chv) Mutant Bacteria on Different Plant Species 1

Martha C Hawes 1,2, Steven G Pueppke 1,2,2
PMCID: PMC1061960  PMID: 16666980

Abstract

Chromosomal virulence (chv) mutants of Agrobacterium tumefaciens have been reported to be deficient in binding to cells of zinnia, tobacco, and bamboo. The mutants are nonpathogenic on stems of Kalanchoë, sunflower, tomato, Jerusalem artichoke, and tobacco, but they cause tumors on tubers of Solanum tuberosum. We used a root cap cell binding assay to test ability of cells from individual plants of 13 different plant species to bind parent or chv mutant bacteria. The same plants were then inoculated to test for disease response. Cells from nine of the plant species were grossly deficient in their abilities to bind mutant bacteria, and the plants inoculated with mutant bacteria failed to form tumors. In contrast, root cap cells as well as root hairs and root surfaces of S. tuberosum, S. okadae, and S. hougasii bound chv mutant bacteria as well as wild type. Nevertheless, S. tuberosum roots inoculated with mutant bacteria did not develop tumors. Although S. okadae plants inoculated with mutant bacteria formed a few tumors, and S. hougasii developed as many tumors in response to chv mutants as in response to the parent strain, the tumors induced by mutant bacteria were smaller.

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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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