SABP2, a methyl salicylate esterase is required for the systemic acquired resistance induced by acibenzolar-S-methyl in plants |
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| Authors: | Diwaker Tripathi Dhirendra Kumar |
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| Affiliation: | a Department of Biological Sciences, Box 70703, East Tennessee State University, Johnson City, TN 37614, USA
b Department of Chemistry, East Tennessee State University, Johnson City, TN 37614, USA |
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| Abstract: | Tobacco SABP2, a 29 kDa 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. |
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| Keywords: | Acibenzolar-S-methyl Acibenzolar Salicylic acid-binding protein 2 Systemic acquired resistance Methyl salicylic acid |
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