Induction of ECM-like root tips in five poplars with eFp: A phylogenetic relationships between five poplar trees from the three sections were constructed with 138 orthologous genes using RAxML v. 8.2.12; B growth status of cuttings of five poplars. The genomic data of the poplar species are presented in Suppl. material 1: table S5; C–E gross morphology of ECM-like root tips and a detail of cross-sections showing extensive hyphal colonisation across root epidermis and cortex in the five poplar–eFp associations. All scale bars are shown in each panel.