Received: DecemAccepted: ApPublished: June 23, 2016Ĭopyright: © 2016 Vetter et al. The differentiation of these responses reveals MAMP-specific fine tuning of the immune response.Ĭitation: Vetter M, Karasov TL, Bergelson J (2016) Differentiation between MAMP Triggered Defenses in Arabidopsis thaliana. We find limited genetic similarity, revealing novel MAMP-specific signaling components. We further investigated the genetic bases underlying growth changes to determine whether similar genes contribute to variation in the response to EF-Tu and flagellin bacterial signals. Although plants respond similarly to recognition of different variants of the same MAMP, we found the response to one MAMP class to be largely uncorrelated with the response to the other class. We comprehensively tested the extent of functional redundancy in the response of 186 genotypes of Arabidopsis thaliana to variants of each of two classes of bacterial signals, flagellin and EF-Tu. Here, we sought to determine whether plants evolve distinct or shared responses to two canonical MAMPs within natural populations. These recognition events are thought to induce largely redundant defense signaling, the magnitude of which varies quantitatively among populations, perhaps in response to environment specific differences in microbial threat. Specialized receptors encoded by plants detect different components of bacterial machinery, and initiate an immune response. Our results indicate that natural variation in MAMP recognition is largely MAMP-specific, indicating an ability to differentially tailor responses to EF-Tu and flagellin in A. Further investigation of the genetic bases of differences in seedling growth inhibition and validation of 11 candidate genes reveal substantial differences in the genetic loci that underlie variation in response to these two MAMPs. Our results reveal negligible correlation in plant growth responses between the bacterial MAMPs EF-Tu and flagellin. Here, we sought to determine the extent to which the detection of two canonical MAMPs were evolving redundantly or distinctly within natural populations. Responses to MAMP exposure evolve quantitatively in natural populations of Arabidopsis thaliana, perhaps in response to environment specific differences in microbial threat. While these receptors are thought to function largely redundantly, the physiological responses to different MAMPs can differ in detail. Plants, like animals, encode several receptors that recognize different MAMPs. A first line of defense against pathogen attack for both plants and animals involves the detection of microbe-associated molecular patterns (MAMPs), followed by the induction of a complex immune response.
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