Acetosyringone
chemical compound
Acetosyringone is a phenolic natural product and a chemical compound related to acetophenone and 2,6-dimethoxyphenol. It was first described in relation to lignan/phenylpropanoid-type phytochemicals, with isolation from a variety of plant sources, in particular, in relation to wounding and other physiologic changes.
Occurrence and biological role
Historically, this substance has been best known for its involvement in plant-pathogen recognition, especially its role as a signal attracting and transforming unique, oncogenic bacteria in genus Agrobacterium. The virA gene on the Ti plasmid of Agrobacterium tumefaciens and the Ri plasmid of Agrobacterium rhizogenes is used by these soil bacteria to infect plants, via its encoding for a receptor for acetosyringone and other phenolic phytochemicals exuded by plant wounds. This compound also allows higher transformation efficiency in plants, as shown in A. tumefaciens-mediated transformation procedures, and so is of importance in plant biotechnology.
Acetosyringone can also be found in Posidonia oceanica and a wide variety of other plants. It is secreted at wounded sites of dicotyledons. This compound enhances the Agrobacterium-mediated gene transformation in dicots. Monocotyledons lack this wound response, which is considered the limiting factor in Agrobacterium-mediated gene transformation in monocots.
The compound is also produced by the male leaffooted bug (Leptoglossus phyllopus) and used in its communication system.
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