1. Plant‐Soil Interactions Institute for Sustainability Sciences Agroscope 8046 Zürich Switzerland
2. Institute of Evolutionary Biology and Environmental Studies University of Zürich 8057 Zürich Switzerland
3. Plant‐microbe Interactions Institute of Environmental Biology Faculty of Science Utrecht University 3584 CH Utrecht the Netherlands
4. INRA Lab of Excellence ARBRE UMR 1136 INRA‐Université de Lorraine, Interactions Arbres/Microorganismes 54280 Champenoux France
5. Département Systématique et Evolution (UMR 7205 ISYEB) Muséum national d'Histoire naturelle CP 50 45 rue Buffon 75005 Paris France
6. Department of Ecology and Evolution University of Lausanne Biophore Building 1015 Lausanne Switzerland