A Ti-plasmid determined function is responsible for chemotaxis of Agrobacterium tumefaciens towards the plant wound product acetosyringone
1987; Oxford University Press; Volume: 41; Issue: 2 Linguagem: Inglês
10.1111/j.1574-6968.1987.tb02194.x
ISSN1574-6968
AutoresA.M. Ashby, Martin D. Watson, Charles H. Shaw,
Tópico(s)Transgenic Plants and Applications
ResumoAgrobacterium tumefaciens C58C1[pTiB6S3] harbouring the octopine Ti-plasmid pTiB6S3, showed positive chemotaxis towards the phenolic plant wound exudate acetosyringone (AS). Maximal attraction was observed at 10−7 M. In contrast, A. tumefaciens C58C1 lacking a Ti-plasmid, exhibited no chemotactic response to AS. However, chemotaxis did occur towards the plant phenolic vanillyl alcohol, but at higher concentrations (10−2 M) and in both Ti-plasmid-containing and cured A. tumefaciens. These results indicate that at least one Ti-plasmid function is involved in the specific chemotactic response to AS, although chemotaxis per se is not Ti-plasmid-encoded. This correlates well with the specific induction of vir-operons mediated by this plant wound product [1].
Referência(s)