Data from: Microbial and volatile profiling of soils suppressive to Fusarium culmorum of wheat

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.