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. 1980 Nov;144(2):732–743. doi: 10.1128/jb.144.2.732-743.1980

Agrobacterium tumefaciens mutants affected in crown gall tumorigenesis and octopine catabolism.

D J Garfinkel, E W Nester
PMCID: PMC294723  PMID: 6253441

Abstract

Mutants of Agrobacterium tumefaciens which affect virulence or the ability to catabolize octopine were isolated after Tn5-induced mutagenesis. Of 8,900 colonies tested, 7 mutants with Tn5 insertions in a specific region of other Ti plasmid unable to catabolize octopine were isolated. Thirty-seven mutants affected in tumorigenesis resulted from insertions in the Ti plasmid and the Agrobacterium chromosome. Of these mutations, 12 were chromosomal and 25 mapped on the plasmid. Twenty-three mapped within a 20-megadalton region, which is distinct from the Ti plasmid sequences found stably integrated into the plant cell genome T-deoxyribonucleic acid). Included in these were mutants that were either a virulent or produced tumors with unusual morphologies. Three mutants contained insertions in the T-deoxyribonucleic acid. These three mutants incited tumors which synthesized octopine but had an altered morphology due to either extensive proliferation of shoots or roots from the tumor callus. Three additional mutants not caused by Tn5 contained mutations in the Ti plasmid.

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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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