1. SABP2, a methyl salicylate esterase is required for the systemic acquired resistance induced by acibenzolar-S -methyl in plants
- Author
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Yu-Lin Jiang, Diwaker Tripathi, and Dhirendra Kumar
- Subjects
Acibenzolar ,Biophysics ,Genetically modified crops ,Biology ,Plant disease resistance ,Biochemistry ,Esterase ,chemistry.chemical_compound ,Acibenzolar-S-methyl ,Structural Biology ,Thiadiazoles ,Tobacco ,Genetics ,Gene Silencing ,skin and connective tissue diseases ,Molecular Biology ,Plant Diseases ,Plant Proteins ,fungi ,Esterases ,Cell Biology ,respiratory system ,Immunity, Innate ,Salicylates ,Plant Leaves ,body regions ,chemistry ,Biocatalysis ,Systemic acquired resistance ,Methyl salicylic acid ,Metabolic Networks and Pathways ,Methyl salicylate ,Salicylic acid ,Salicylic acid-binding protein 2 - Abstract
Tobacco SABP2, a 29kDa protein catalyzes the conversion of methyl salicylic acid (MeSA) into salicylic acid (SA) to induce SAR. Pretreatment of plants with acibenzolar-S-methyl (ASM), a functional analog of salicylic acid induces systemic acquired resistance (SAR). Data presented in this paper suggest that SABP2 catalyzes the conversion of ASM into acibenzolar to induce SAR. Transgenic SABP2-silenced tobacco plants when treated with ASM, fail to express PR-1 proteins and do not induce robust SAR expression. When treated with acibenzolar, full SAR is induced in SABP2-silenced plants. These results show that functional SABP2 is required for ASM-mediated induction of resistance.
- Published
- 2010