Figure 4.

Phylogenetic relationship of Aux/IAA proteins. (a) The tree was reconstructed using Aux/IAA sequences of Arabidopsis thaliana (gray) and buckwheat (blue). Evolutionary distances were computed using the p-distance method and expressed in units of the number of amino acid substitutions per site. (b) The tree was reconstructed using Aux/IAA sequences in Oryza sativa (blue), Sorghum bicolor (gray), Zea mays (green), and buckwheat (red). Evolutionary distances were computed using the p-distance method and expressed in units of the number of amino acid substitutions per site.