title: Synergistic action of phenolic signal compounds and carbohydrates in the induction of virulence gene expression of Agrobacterium tumefaciens.
abstract: Virulence (vir) gene expression of Agrobacterium tumefaciens is activated by plant phenolic compounds such as alpha-hydroxyacetosyringone (HOAS), acetosyringone (AS), methyl syringate, coniferyl alcohol and sinapyl alcohol. Inositol was found to be a potentiating factor of vir-inducing activity, which enhanced the vir-inducing activity of AS and HOAS in a synergistic manner, in particular at a low concentrations of AS and HOAS. Of the other sugars tested D-glucose, L-rhamnose, D-xylose and D-galacturonic acid, the main components of plant cell wall polysaccharides, remarkedly potentiated the vir-inducing activity of AS, indicating the cooperative action of the signal compounds and sugars in Agrobacterium infection to plants.
authors.affiliation: Faculty of Pharmaceutical Sciences, University of Tokyo, Japan.
authors.forename: Y N
authors.initials: YN
authors.lastname: Song
authors.forename: M
authors.initials: M
authors.lastname: Shibuya
authors.forename: Y
authors.initials: Y
authors.lastname: Ebizuka
authors.forename: U
authors.initials: U
authors.lastname: Sankawa
mesh_terms: D016960:Agrobacterium tumefaciens / Q000235:genetics* / Q000472:pathogenicity; D002241:Carbohydrates / Q000494:pharmacology*; D004357:Drug Synergism; D015870:Gene Expression / Q000187:drug effects*; D007294:Inositol / Q000494:pharmacology; D010636:Phenols / Q000494:pharmacology*; D014774:Virulence / Q000235:genetics
chemical_list: D002241:Carbohydrates; D010636:Phenols; D007294:Inositol