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A Plant miRNA Contributes to Antibacterial Resistance by Repressing Auxin Signaling

Lionel Navarro, Patrice Dunoyer, Florence Jay, Nihal Dharmasiri, Mark A. Estelle, Olivier Voinnet, Jonathan D. G. Jones

Science · 2006 · 2,012 citations

doi.org/10.1126/science.1126088

Abstract

Plants and animals activate defenses after perceiving pathogen-associated molecular patterns (PAMPs) such as bacterial flagellin. In Arabidopsis, perception of flagellin increases resistance to the bacterium Pseudomonas syringae, although the molecular mechanisms involved remain elusive. Here, we show that a flagellin-derived peptide induces a plant microRNA (miRNA) that negatively regulates messenger RNAs for the F-box auxin receptors TIR1, AFB2, and AFB3. Repression of auxin signaling restricts P. syringae growth, implicating auxin in disease susceptibility and miRNA-mediated suppression of auxin signaling in resistance.

Cite this paper

Navarro, L., Dunoyer, P., Jay, F., Arnold, B., Dharmasiri, N., Estelle, M. A., Voinnet, O., & Jones, J. D. G. (2006). A plant miRNA contributes to antibacterial resistance by repressing auxin signaling. Science, 312(5772), 436–439. https://doi.org/10.1126/science.1126088

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