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A volatile relationship: profiling an inter-kingdom dialogue between two plant pathogens, Ralstonia Solanacearum and Aspergillus Flavus.

Authors
  • Spraker, Joseph E
  • Jewell, Kelsea
  • Roze, Ludmila V
  • Scherf, Jacob
  • Ndagano, Dora
  • Beaudry, Randolph
  • Linz, John E
  • Allen, Caitilyn
  • Keller, Nancy P
Type
Published Article
Journal
Journal of Chemical Ecology
Publisher
Springer-Verlag
Publication Date
May 01, 2014
Volume
40
Issue
5
Pages
502–513
Identifiers
DOI: 10.1007/s10886-014-0432-2
PMID: 24801606
Source
Medline
License
Unknown

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.

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