1. Metabolomic profiling reveals suppression of oxylipin biosynthesis during the early stages of legume-rhizobia symbiosis.
- Author
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Zhang N, Venkateshwaran M, Boersma M, Harms A, Howes-Podoll M, den Os D, Ané JM, and Sussman MR
- Subjects
- Base Sequence, DNA, Plant genetics, Genes, Plant, Lipopolysaccharides metabolism, Lipopolysaccharides pharmacology, Medicago truncatula drug effects, Medicago truncatula genetics, Medicago truncatula microbiology, Metabolome, Metabolomics, Plant Proteins genetics, Plant Proteins metabolism, Plants, Genetically Modified, Rhizobium metabolism, Signal Transduction, Spectrometry, Mass, Electrospray Ionization, Medicago truncatula metabolism, Oxylipins metabolism, Symbiosis physiology
- Abstract
The establishment of symbiosis between leguminous plants and rhizobial bacteria requires rapid metabolic changes in both partners. We utilized untargeted quantitative mass spectrometry to perform metabolomic profiling of small molecules in extracts of the model legume Medicago truncatula treated with rhizobial Nod factors. One metabolite closely resembling the 9(R)-HODE class of oxylipins reproducibly showed a decrease in concentration within the first hour of in planta nod factor treatment. Oxylipins are precursors of the jasmonic acid biosynthetic pathway and we showed that both this metabolite and jasmonic acid inhibit Nod factor signaling. Since, oxylipins have been implicated as antimicrobial compounds produced by plants, these observations suggest that the oxylipin pathway may play multiple roles in facilitating Nod factor signaling during the early stages of symbiosis., (Copyright © 2012 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.)
- Published
- 2012
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