1. Democritus University of Thrace, Faculty of Agricultural and Forestry Sciences; Department of Agricultural Development; Orestiada Greece
2. Utrecht University, Faculty of Science; Department of Biology, Plant − Microbe Interactions; Utrecht The Netherlands
3. University of Amsterdam; Institute for Biodiversity and Ecosystem Dynamics, Section Molecular and Chemical Ecology; Amsterdam The Netherlands
4. Wageningen UR Greenhouse Horticulture; Bleiswijk The Netherlands
5. Freie Universität Berlin; Institute of Biology, Molecular Ecology, Dahlem Centre of Plant Sciences; Berlin Germany
6. Biobest; Westerlo Belgium
7. Lancaster University; Lancaster Environment Centre; UK
8. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; Leipzig Germany
9. Friedrich Schiller University Jena; Institute of Ecology; Jena Germany