Figure 1.

Structural and phylogenetic relationship among Class III HD-Zip genes in rice. A, Exon-intron structure of five OSHB genes. Exons are presented by boxes, and introns by bars. Introns within the cording region are numbered. Exons in black, dotted, and light gray boxes indicate the position of the homeodomain, Leu zipper, and START domains, respectively. Arrowheads indicate the miR166-binding site. B, Phylogenetic tree of HD-ZIP III proteins in several angiosperms rooted by PpHB10. Numbers above the branches indicate bootstrap values calculated from 1,000 replicates.