title: A metabolic profiling strategy for the dissection of plant defense against fungal pathogens.
abstract: Here we present a metabolic profiling strategy employing direct infusion Orbitrap mass spectrometry (MS) and gas chromatography-mass spectrometry (GC/MS) for the monitoring of soybean's (Glycine max L.) global metabolism regulation in response to Rhizoctonia solani infection in a time-course. Key elements in the approach are the construction of a comprehensive metabolite library for soybean, which accelerates the steps of metabolite identification and biological interpretation of results, and bioinformatics tools for the visualization and analysis of its metabolome. The study of metabolic networks revealed that infection results in the mobilization of carbohydrates, disturbance of the amino acid pool, and activation of isoflavonoid, α-linolenate, and phenylpropanoid biosynthetic pathways of the plant. Components of these pathways include phytoalexins, coumarins, flavonoids, signaling molecules, and hormones, many of which exhibit antioxidant properties and bioactivity helping the plant to counterattack the pathogen's invasion. Unraveling the biochemical mechanism operating during soybean-Rhizoctonia interaction, in addition to its significance towards the understanding of the plant's metabolism regulation under biotic stress, provides valuable insights with potential for applications in biotechnology, crop breeding, and agrochemical and food industries.
authors.affiliation: Department of Plant Science, Macdonald Campus of McGill University, Sainte-Anne-de-Bellevue, Quebec, Canada.
authors.forename: Konstantinos A
authors.initials: KA
authors.lastname: Aliferis
authors.affiliation: Institut de Recherches Cliniques de Montréal, Montréal, Quebec, Canada.
authors.forename: Denis
authors.initials: D
authors.lastname: Faubert
authors.affiliation: Department of Plant Science, Macdonald Campus of McGill University, Sainte-Anne-de-Bellevue, Quebec, Canada.
authors.forename: Suha
authors.initials: S
authors.lastname: Jabaji
mesh_terms: D053898:Biosynthetic Pathways; D060467:Disease Resistance; D054884:Host-Pathogen Interactions; D055442:Metabolome; D010935:Plant Diseases / Q000382:microbiology*; D012232:Rhizoctonia / Q000502:physiology*; D013025:Glycine max / Q000378:metabolism* / Q000382:microbiology; D017962:alpha-Linolenic Acid / Q000378:metabolism
chemical_list: D017962:alpha-Linolenic Acid