Transcriptome of Pseudomonas simiae WCS417 in responses to root-secreted coumarins

Coumarins can mobilize iron from the soil environment and have a selective antimicrobial activity that impacts microbiome assembly in the rhizosphere. Being highly coumarin-tolerant, Pseudomonas simiae WCS417 induces the secretion of these phenolic compounds, likely to improve its own niche establishment, while in return providing growth and immunity benefits for the host. To investigate the possible signaling function of coumarins in the mutualistic Arabidopsis-WCS417 interaction, we analyzed the transcriptome of WCS417 growing in root exudates of coumarin-producing Arabidopsis Col-0 and the coumarin-biosynthesis mutant f6'h1.