SABP2, a methyl salicylate esterase is required for the systemic acquired resistance induced by acibenzolar-S-methyl in plants.
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.
Tripathi
Diwaker
D
Department of Biological Sciences, Box 70703, East Tennessee State University, Johnson City, TN 37614, USA.
Jiang
Yu-Lin
YL
Kumar
Dhirendra
D
D055162:Biocatalysis / Q000187:drug effects; D004950:Esterases / Q000378:metabolism*; D020868:Gene Silencing / Q000187:drug effects; D007113:Immunity, Innate / Q000187:drug effects* / Q000276:immunology; D053858:Metabolic Networks and Pathways / Q000187:drug effects; D010935:Plant Diseases / Q000276:immunology*; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism*; D012459:Salicylates / Q000378:metabolism*; D013830:Thiadiazoles / Q000494:pharmacology*; D014026:Nicotiana / Q000187:drug effects / Q000201:enzymology* / Q000276:immunology*
D010940:Plant Proteins; D012459:Salicylates; D013830:Thiadiazoles; C099403:S-methyl benzo(1,2,3)thiadiazole-7-carbothioate; C499506:SABP2 protein, Nicotiana tabacum; D004950:Esterases; C033069:methyl salicylate