Abstract
Inducible T-strand mobilization from the Ti plasmid of Agrobacterium tumefaciens to the genome of a plant host is mediated by the activation of a cascade of bacterial virulence genes. It is initiated when the bacterium senses the presence of a low molecular weight inducer secreted by the plant. Although many hydroxyphenylpropanoid and phenolic compounds can activate the virulence cascade, the only native inducers that have been identified to date are acetosyringone and hydroxyacetosyringone. A new inducer, the phenylpropanoid glucoside coniferin, has now been isolated from Pseudotsuga menziesii (Douglas-fir). Agrobacterium strains that were more tumorigenic on gymnosperms were more effectively induced by coniferin.
Full text
PDF
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bolton G. W., Nester E. W., Gordon M. P. Plant phenolic compounds induce expression of the Agrobacterium tumefaciens loci needed for virulence. Science. 1986 May 23;232(4753):983–985. doi: 10.1126/science.3085219. [DOI] [PubMed] [Google Scholar]
- Ditta G., Stanfield S., Corbin D., Helinski D. R. Broad host range DNA cloning system for gram-negative bacteria: construction of a gene bank of Rhizobium meliloti. Proc Natl Acad Sci U S A. 1980 Dec;77(12):7347–7351. doi: 10.1073/pnas.77.12.7347. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gasser C. S., Fraley R. T. Genetically engineering plants for crop improvement. Science. 1989 Jun 16;244(4910):1293–1299. doi: 10.1126/science.244.4910.1293. [DOI] [PubMed] [Google Scholar]
- Hernalsteens J. P., Thia-Toong L., Schell J., Van Montagu M. An Agrobacterium-transformed cell culture from the monocot Asparagus officinalis. EMBO J. 1984 Dec 20;3(13):3039–3041. doi: 10.1002/j.1460-2075.1984.tb02254.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kosslak R. M., Bookland R., Barkei J., Paaren H. E., Appelbaum E. R. Induction of Bradyrhizobium japonicum common nod genes by isoflavones isolated from Glycine max. Proc Natl Acad Sci U S A. 1987 Nov;84(21):7428–7432. doi: 10.1073/pnas.84.21.7428. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Melchers L. S., Regensburg-Tuïnk A. J., Schilperoort R. A., Hooykaas P. J. Specificity of signal molecules in the activation of Agrobacterium virulence gene expression. Mol Microbiol. 1989 Jul;3(7):969–977. doi: 10.1111/j.1365-2958.1989.tb00246.x. [DOI] [PubMed] [Google Scholar]
- Peters N. K., Frost J. W., Long S. R. A plant flavone, luteolin, induces expression of Rhizobium meliloti nodulation genes. Science. 1986 Aug 29;233(4767):977–980. doi: 10.1126/science.3738520. [DOI] [PubMed] [Google Scholar]
- Stachel S. E., Nester E. W. The genetic and transcriptional organization of the vir region of the A6 Ti plasmid of Agrobacterium tumefaciens. EMBO J. 1986 Jul;5(7):1445–1454. doi: 10.1002/j.1460-2075.1986.tb04381.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Stachel S. E., Zambryski P. C. virA and virG control the plant-induced activation of the T-DNA transfer process of A. tumefaciens. Cell. 1986 Aug 1;46(3):325–333. doi: 10.1016/0092-8674(86)90653-7. [DOI] [PubMed] [Google Scholar]
- Zambryski P. Basic processes underlying Agrobacterium-mediated DNA transfer to plant cells. Annu Rev Genet. 1988;22:1–30. doi: 10.1146/annurev.ge.22.120188.000245. [DOI] [PubMed] [Google Scholar]
- Zambryski P., Tempe J., Schell J. Transfer and function of T-DNA genes from agrobacterium Ti and Ri plasmids in plants. Cell. 1989 Jan 27;56(2):193–201. doi: 10.1016/0092-8674(89)90892-1. [DOI] [PubMed] [Google Scholar]