Plant metabolism of nematode pheromones mediates plant-nematode interactions.

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ID: 79506
2020
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Abstract
Microorganisms and nematodes in the rhizosphere profoundly impact plant health, and small-molecule signaling is presumed to play a central role in plant rhizosphere interactions. However, the nature of the signals and underlying mechanisms are poorly understood. Here we show that the ascaroside ascr#18, a pheromone secreted by plant-parasitic nematodes, is metabolized by plants to generate chemical signals that repel nematodes and reduce infection. Comparative metabolomics of plant tissues and excretions revealed that ascr#18 is converted into shorter side-chained ascarosides that confer repellency. An Arabidopsis mutant defective in two peroxisomal acyl-CoA oxidases does not metabolize ascr#18 and does not repel nematodes, indicating that plants, like nematodes, employ conserved peroxisomal β-oxidation to edit ascarosides and change their message. Our results suggest that plant-editing of nematode pheromones serves as a defense mechanism that acts in parallel to conventional pattern-triggered immunity, demonstrating that plants may actively manipulate chemical signaling of soil organisms.
Reference Key
manohar2020plantnature Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Manohar, Murli;Tenjo-Castano, Francisco;Chen, Shiyan;Zhang, Ying K;Kumari, Anshu;Williamson, Valerie M;Wang, Xiaohong;Klessig, Daniel F;Schroeder, Frank C;
Journal Nature communications
Year 2020
DOI
10.1038/s41467-019-14104-2
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