Requirement of salicylic acid for the induction of systemic acquired resistance
1993
Gaffney, T. | Friedrich, L. | Vernooij, B. | Negrotto, D. | Nye, G. | Uknes, S. | Ward, E. | Kessmann, H. | Ryals, J.
It has been proposed that salicylic acid acts as an endogenous signal responsible for inducing systemic acquired resistance in plants. The contribution of salicylic acid to systemic acquired resistance was investigated in transgenic tobacco plants harboring a bacterial gene encoding salicylate hydroxylase, which converts salicylic acid to catechol. Transgenic plants that express salicylate hydroxylase accumulated little or no salicylic acid and were defective in their ability to induce acquired resistance against tobacco mosaic virus. Thus, salicylic acid is essential for the development of systemic acquired resistance in tobacco.
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