title: A volatile relationship: profiling an inter-kingdom dialogue between two plant pathogens, Ralstonia Solanacearum and Aspergillus Flavus.
abstract: Microbes in the rhizosphere have a suite of extracellular compounds, both primary and secondary, that communicate with other organisms in their immediate environment. Here, we describe a two-way volatile interaction between two widespread and economically important soil-borne pathogens of peanut, Aspergillus flavus and Ralstonia solanacearum, a fungus and bacterium, respectively. In response to A. flavus volatiles, R. solanacearum reduced production of the major virulence factor extracellular polysaccharide (EPS). In parallel, A. flavus responded to R. solanacearum volatiles by reducing conidia production, both on plates and on peanut seeds and by increasing aflatoxin production on peanut. Volatile profiling of these organisms using solid-phase micro-extraction gas chromatography mass spectroscopy (SPME-GCMS) provided a first glimpse at the compounds that may drive these interactions.
authors.affiliation: Department of Plant Pathology, University of Wisconsin-Madison, 53706, Madison, WI, USA.
authors.forename: Joseph E
authors.initials: JE
authors.lastname: Spraker
authors.forename: Kelsea
authors.initials: K
authors.lastname: Jewell
authors.forename: Ludmila V
authors.initials: LV
authors.lastname: Roze
authors.forename: Jacob
authors.initials: J
authors.lastname: Scherf
authors.forename: Dora
authors.initials: D
authors.lastname: Ndagano
authors.forename: Randolph
authors.initials: R
authors.lastname: Beaudry
authors.forename: John E
authors.initials: JE
authors.lastname: Linz
authors.forename: Caitilyn
authors.initials: C
authors.lastname: Allen
authors.forename: Nancy P
authors.initials: NP
authors.lastname: Keller
mesh_terms: D000348:Aflatoxins / Q000378:metabolism; D010367:Arachis / Q000382:microbiology*; D001231:Aspergillus flavus / Q000502:physiology*; D056265:Microbial Interactions; D010935:Plant Diseases / Q000382:microbiology*; D011135:Polysaccharides, Bacterial / Q000378:metabolism; D043368:Ralstonia solanacearum / Q000502:physiology*; D055549:Volatile Organic Compounds / Q000378:metabolism
chemical_list: D000348:Aflatoxins; D011135:Polysaccharides, Bacterial; D055549:Volatile Organic Compounds