Figure 3.

Phylogenetic analysis of vascular plant PDR protein sequences obtained by maximum likelihood. Protein sequences were arbitrarily grouped into nine clusters (I–IX) based on close sequence similarity. Red branches are leading to PDR sequences belonging to gymnosperm sequences. Sequence names have been pruned from the tree for the sake of clarity. Sequence names belonging to each cluster can be found in Table S1. Node support from 1,000 replicates is indicated for the basal nodes defining the nine putative PDR sequence clusters. For further details, see Appendix S2