Fig. 4From: Strigolactone synthesis is ancestral in land plants, but canonical strigolactone signalling is a flowering plant innovationOptimal phylogeny for MAX1 family. Maximum likelihood (ML) tree with the amino acid dataset under the PROTCATLGX model in RAxML. Topology rooted with the algal MAX1 clade. The fully labelled phylogeny is shown in Additional file 11CBack to article page