Microbial and volatile profiling of soils suppressive to Fusarium culmorum of wheat

Adam Ossowicki, Vittorio Tracanna, M.L.C. Petrus, Gilles van Wezel, J.M. Raaijmakers, Marnix H Medema (Corresponding author), Paolina Garbeva (Corresponding author)

Research output: Contribution to journal/periodicalArticleScientificpeer-review

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In disease-suppressive soils, microbiota protect plants from root infections. Bacterial members of this microbiota have been shown to produce specific molecules that mediate this phenotype. To date, however, studies have focused on individual suppressive soils and the degree of natural variability of soil suppressiveness remains unclear. Here, we screened a large collection of field soils for suppressiveness to Fusarium culmorum using wheat ( Triticum aestivum) as a model host plant. A high variation of disease suppressiveness was observed, with 14% showing a clear suppressive phenotype. The microbiological basis of suppressiveness to F. culmorum was confirmed by gamma sterilization and soil transplantation. Amplicon sequencing revealed diverse bacterial taxonomic compositions and no specific taxa were found exclusively enriched in all suppressive soils. Nonetheless, co-occurrence network analysis revealed that two suppressive soils shared an overrepresented bacterial guild dominated by various Acidobacteria. In addition, our study revealed that volatile emission may contribute to suppression, but not for all suppressive soils. Our study raises new questions regarding the possible mechanistic variability of disease-suppressive phenotypes across physico-chemically different soils. Accordingly, we anticipate that larger-scale soil profiling, along with functional studies, will enable a deeper understanding of disease-suppressive microbiomes.

Original languageEnglish
Article number 20192527.
Pages (from-to)20192527
JournalProceedings of the Royal Society B-Biological Sciences
Issue number1921
Early online date2020
Publication statusPublished - 26 Feb 2020


  • national
  • Plan_S-Compliant_NO
  • Microbiota
  • Plant Roots/microbiology
  • Soil/chemistry
  • Triticum/microbiology
  • Soil Microbiology
  • Fusarium/physiology
  • Fusarium culmorum
  • Soil volatiles
  • Soil suppressiveness
  • Rhizosphere microbiome


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