Figure 2.

Phylogenetic relationships of aquaporin (AQP) genes in five plant species and conserved motifs of TIP (tonoplast intrinsic protein) in pepper. (A) A phylogenetic tree of AQP genes in five plants including pepper is shown. The colored bars on the outer ring represent different subgroups and colored dots at branch tips indicate genes from five species. Gene names written in different colors are known functional genes. (B) Numbers of AQP genes from five plant species in each subgroup are shown as a heatmap. (C) Numbers of motifs in pepper AQP domains of TIP subgroups are shown as a bar graph. Gray bars are motifs conserved in all clusters and light green bars are subgroup TIP4-specific motifs in the pepper AQP domains.