1. Department of Ecology and Evolution, University of Lausanne, Biophore Building, CH–1015 Lausanne, Switzerland;
2. UMR 1136, Interactions Arbres/Microorganismes, INRA‐Nancy, F–54280 Champenoux, France;
3. Molecular Wood Biotechnology and Technical Mycology, Büsgen‐Institute, Georg‐August‐University Göttingen, D–37077 Göttingen, Germany