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Linking soil's volatilome to microbes and plant roots highlights the importance of microbes as emitters of belowground volatile signals.

Authors
  • Schenkel, Denis1, 2
  • Deveau, Aurélie3
  • Niimi, Jun1
  • Mariotte, Pierre4, 5
  • Vitra, Amarante4, 5
  • Meisser, Marco6
  • Buttler, Alexandre4, 5, 7
  • Splivallo, Richard1, 2, 4
  • 1 Institute for Molecular Biosciences, Goethe University Frankfurt, Max-von-Laue Str. 9, 60438, Frankfurt am Main, Germany. , (Germany)
  • 2 Integrative Fungal Research Cluster, 60325, Frankfurt, Germany. , (Germany)
  • 3 Institut national de la recherche agronomique (INRA), Unité Mixte de Recherche 1136 INRA-Université de Lorraine, Interactions Arbres/Microorganismes, Centre INRA-Grand Est-Nancy, 54280, Champenoux, France. , (France)
  • 4 Laboratory of Ecological Systems (ECOS), Station 2, École Polytechnique Fédérale de Lausanne (EPFL), School of Architecture, Civil and Environmental Engineering (ENAC), 1015, Lausanne, Switzerland. , (Switzerland)
  • 5 Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Site Lausanne, Case postale 96, 1015, Lausanne, Switzerland. , (Switzerland)
  • 6 Agroscope, Route de Duillier 50, Case Postale 1012, 1260, Nyon, Switzerland. , (Switzerland)
  • 7 Laboratoire de Chrono-Environnement, UMR CNRS 6249, UFR des Sciences et Techniques, 16 route de Gray, Université de Franche-Comté, F-25030, Besançon, France. , (France)
Type
Published Article
Journal
Environmental Microbiology
Publisher
Wiley (Blackwell Publishing)
Publication Date
Mar 20, 2019
Identifiers
DOI: 10.1111/1462-2920.14599
PMID: 30895716
Source
Medline
Language
English
License
Unknown

Abstract

Plants and microbes release a plethora of volatiles that act as signals in plant-microbe interactions. Characterizing soil's volatilome and microbiome might shed light on the nature of relevant volatile signals and on their emitters. This hypothesis was tested by characterizing plant cover, soil's volatilome, nutrient content and microbiomes in three grasslands of the Swiss Jura Mountains. The fingerprints of soil's volatiles were generated by solid-phase micro-extraction gas chromatography/mass spectrometry, whereas high-throughput sequencing was used to create a snapshot of soil's microbial communities. A high similarity was observed in plant communities of two out of three sites, which was mirrored by the soil's volatilome. Multiple factor analysis evidenced a strong association among soil's volatilome, plant and microbial communities. The proportion of volatiles correlated to single bacterial and fungal taxa was higher than for plants. This suggests that those organisms might be major contributors to the volatilome of grassland soils. These findings illustrate that key volatiles in grassland soils might be emitted by a handful of organisms that include specific plants and microbes. Further work will be needed to unravel the structure of belowground volatiles and understand their implications for plant health and development. © 2019 Society for Applied Microbiology and John Wiley & Sons Ltd.

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