Coumarin Communication Along the Microbiome-Root-Shoot Axis.

Max J J Stassen, Shu-Hua Hsu, Corné M J Pieterse, Ioannis A Stringlis

Trends in plant science 2021 Feb

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Plants shape their rhizosphere microbiome by secreting root exudates into the soil environment. Recently, root-exuded coumarins were identified as novel players in plant-microbiome communication. Beneficial members of the root-associated microbiome stimulate coumarin biosynthesis in roots and their excretion into the rhizosphere. The iron-mobilizing activity of coumarins facilitates iron uptake from the soil environment, while their selective antimicrobial activity shapes the root microbiome, resulting in promotion of plant growth and health. Evidence is accumulating that, in analogy to strigolactones and flavonoids, coumarins may act in microbiome-to-root-to-shoot signaling events. Here, we review this multifaceted role of coumarins in bidirectional chemical communication along the microbiome-root-shoot axis. Copyright © 2020 Elsevier Ltd. All rights reserved.

Citation

Max J J Stassen, Shu-Hua Hsu, Corné M J Pieterse, Ioannis A Stringlis. Coumarin Communication Along the Microbiome-Root-Shoot Axis. Trends in plant science. 2021 Feb;26(2):169-183