Figure 2.

Phylogeny of the PIN genes. Maximum likelihood phylogeny of PIN genes from land plants, based upon coding sequences from the loci listed in Table A4 in Appendix. Gray branches indicate nodes with bootstrap support lower than 50%. Basal land plant PINs are colored blue, Populus green, Arabidopsis red, and monocots yellow. Abbreviated names of each species are listed in Table A1 in Appendix.