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The virulence system of Agrobacterium tumefaciens

Nester, E W, Verma, D P S Current Plant Science and Biotechnology in Agriculture; Advances in molecular genetics of plant-microbe interactions, Vol 2: 37-49

The virulence system of Agrobacterium tumefaciens

Accession: 002530934

DOI: 10.1146/

Related references

Beijersbergen, A.; Dulk-Ras, A.D.; Schilperoort, R.A.; Hooykaas, P.J., 1992: Conjugative Transfer by the Virulence System of Agrobacterium tumefaciens. Agrobacterium tumefaciens transfers part of its Ti plasmid, the transferred DNA (T-DNA), to plant cells during tumor induction. Expression of this T-DNA in plant cells results in their transformation into tumor cells. There are similarities betwee...

Charles, T.C.; Nester, E.W., 1993: A chromosomally encoded two-component sensory transduction system is required for virulence of Agrobacterium tumefaciens. TnphoA mutagenesis of Agrobacterium tumefaciens identified new extracytoplasmic protein-encoding virulence loci. Mutations in these loci conferred increased sensitivity to detergents and several antibiotics. Clones carrying these loci were isolate...

Colak O.; Beiderbeck R., 1980: Some conditions of the virulence transfer between agrobacterium tumefaciens and agrobacterium rhizogenes in vitro. Virulence transfer between the virulent strain B6-806 of A. tumefaciens and the avirulent isolate 3Co3 of A. rhizogenes was promoted by octopine but not by the precursors of octopine (arginine, pyruvate) or related substances (carnosine, agmatine)...

Otten L.; D.G.eve H.; Leemans J.; Hain R.; Hooykaas P.; Schell J., 1984: Restoration of virulence of vir region mutants of agrobacterium tumefaciens strain b 6s 3 by co infection with normal and mutant agrobacterium strains. Three avirulent transposon Tn7 insertion mutants mapping in the vir E region of the A. tumefaciens plasmid pTiB6S3 regain virulence [for Kalanchoe daigremontiana] by co-infection with several wild-type strains and with a number of strains carrying...

Van Haaren, M.J.; Sedee, N.J.; Krul, M.; Schilperoort, R.A.; Hooykaas, P.J., 1988: Function of heterologous and pseudo border repeats in T region transfer via the octopine virulence system of Agrobacterium tumefaciens. The successful transfer of the Ti plasmid T region to the plant cell is mediated by its 24 bp border repeats. Processing of the T-region prior to transfer to the plant cell is started at the right border repeat and is stimulated by a transfer enha...

Baron, C.; Domke, N.; Beinhofer, M.; Hapfelmeier, S., 2001: Elevated temperature differentially affects virulence, VirB protein accumulation, and T-pilus formation in different Agrobacterium tumefaciens and Agrobacterium vitis strains. That gene transfer to plant cells is a temperature-sensitive process has been known for more than 50 years. Previous work indicated that this sensitivity results from the inability to assemble a functional T pilus required for T-DNA and protein tr...

Kang HeeWan, 1997: Association with virulence of the upstream region of a chromosomal virulence gene, acvB, in Agrobacterium tumefaciens. An association of virulence with the upstream region of the acvB gene of A. tumefaciens was investigated. To confirm the association, Introposon (Kmr) was inserted into the middle part to disrupt the upstream region of the acvB gene, and the mutan...

Hawes, M.C.; Pueppke, S.G., 1989: Variation in Binding and Virulence of Agrobacterium tumefaciens Chromosomal Virulence (chv) Mutant Bacteria on Different Plant Species. 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 Kalanchoƫ, sunflower, tomato, Jerusalem artichoke, a...

Lohrke, S.M.; Nechaev, S.; Yang, H.; Severinov, K.; Jin, S., 1999: Transcriptional activation of Agrobacterium tumefaciens virulence gene promoters in E coli requires the rpoA gene from A tumefaciens encoding the subunit of RNA polymerase. Abstracts of the General Meeting of the American Society for Microbiology 99: 355

Lohrke, S.M.; Nechaev, S.; Yang, H.; Severinov, K.; Jin, S.J., 1999: Transcriptional activation of Agrobacterium tumefaciens virulence gene promoters in Escherichia coli requires the A. tumefaciens RpoA gene, encoding the alpha subunit of RNA polymerase. The two-component regulatory system, composed of virA and virG, is indispensable for transcription of virulence genes within Agrobacterium tumefaciens. However, virA and virG are insufficient to activate transcription from virulence gene promoters...