Abstract
In their Report “A plant miRNA contributes to antibacterial resistance by repressing auxin signaling” (21 Apr., p. 436), L. Navarro et al. demonstrate a link between auxin signaling in plants and resistance to bacterial pathogens. As part of a plant-induced immune response, bacterial pathogen-associated molecular pattern (PAMP) recognition down-regulates auxin signaling in Arabidopsis by targeting auxin receptor transcripts. These results indicate that decreasing plant auxin signaling can increase resistance to bacterial pathogens; Navarro et al. also showed that exogenous application of auxin enhances susceptibility to the bacterial pathogen.
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