their ability to suppress soil-borne plant pathogens (bacteria
and microfungi), occurring in the competing microflora.
Different mechanisms are discussed in this context. Besides
production of antimicrobial (“antibiotics”), antiviral and
nematicidal compounds, also stimulation of plant induced
systemic resistance (ISR; Doornbos et al., 2012), and a beneficial
effect on the composition of the host-plant microbiome
might contribute to their suppressive effect (Erlacher et al.,
2014).