Fig. 2

Phylogenetic relationship and subgroup classification of AP2/ERF genes in 10 species. A Phylogenetic tree, in which species are represented by different colors of dots on the end of the branch. The color of each branch and the strap outside of colored dots display different subgroups. The outer ring identifies ERF subgroups (B1-B4) and DREB subgroups (A1-A4). B Heat map showing the number of AP2/ERF genes in subgroups from each species. C The conserved amino acid sequence of AP2 domain in ERF subgroups. The stacked logo depicts multiple amino acids in a specific position. The height of the logo indicates the frequency of amino acids. The letter under the logo indicates the most conserved amino acid in each position. The different conserved residues between ERF subgroups are highlighted in yellow. The position of α-helices and β-sheets are displayed on the upper side of the logos. The calculated consensus ratio of each position is shown as the bar with the color of the secondary structure of the AP2 domain