•We used four grass and four forb species to condition living soil. Then we inoculated those soil microbiomes into sterilized soil and grew chrysanthemum as a focal plant. We evaluated the soil microbiome in the inocula and after chrysanthemum growth, as well as plant and herbivore parameters.
•We show that inocula and inoculated soil in which a focal plant had grown harbor remarkably different microbiomes, with the focal plant exerting a strong negative effect on fungi, especially arbuscular mycorrhizal fungi. Soil inoculation consistently induced resistance against the thrips Frankliniella occidentalis, but not against the mite Tetranychus urticae, when compared with sterilized soil. Additionally, plant species shaped distinct microbiomes that had different effects on thrips, chlorogenic acid levels in leaves and plant growth.
•This study provides a proof‐of‐concept that the plant‐soil feedback concept can be applied to steer soil microbiomes with the goal of inducing resistance aboveground against herbivorous insects.
Replication Data for: Conditioning the soil microbiome through plant-soil feedbacks suppresses an aboveground insect pest
Pineda, A. (Maker), DataverseNL, 2020