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Science. 2006 Apr 21;312(5772):436-9.

A plant miRNA contributes to antibacterial resistance by repressing auxin signaling.

Author information

1
Sainsbury Laboratory, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK.

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.

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PMID:
16627744
DOI:
10.1126/science.1126088
[Indexed for MEDLINE]
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