Swimming against the tide: Chemotaxis inAgrobacterium
| Autor: | Charles H. Shaw |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Acetosyringone
Rhizosphere biology Agrobacterium Chemotaxis Gene Expression Regulation Bacterial Agrobacterium tumefaciens biology.organism_classification General Biochemistry Genetics and Molecular Biology Microbiology chemistry.chemical_compound chemistry Genes Bacterial Gall Gene Bacteria Rhizobium Signal Transduction |
| Zdroj: | BioEssays. 13:25-29 |
| ISSN: | 1521-1878 0265-9247 |
| DOI: | 10.1002/bies.950130105 |
| Popis: | Chemotaxis in bacteria is an excellent model for signal transduction processes. In Agrobacterium tumefaciens, the causative agent of crown gall tumour on wounded plants, it is a vital part of the organism's biology. A chromosomally-determined chemotaxis system causes the bacterium to be attracted into the rhizosphere by chemoattractants in plant exudates. By interfacing with this system, the multifunctional products of two Ti-plasmid encoded genes, virA and virG, allow the sensing of specific wound phenolics such as acetosyringone. This attracts Ti-plasmid harbouring A. tumefaciens to wound sites, where the higher acetosyringone concentrations lead to virA and virG-mediated induction of the vir-genes. The products of the induced genes, act in concert to effect transfer of the T-DNA to the plant cell. |
| Databáze: | OpenAIRE |
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