Figure 4. Phylogenetic tree of ARF proteins from Arabidopsis, maize, rice and wheat.

The purple solid diamonds represent ARF proteins in Arabidopsis (AtARF); The green squares represent ARF proteins in maize (ZmARF); The blue deltas represent ARF proteins in rice (OsARF); The red solid circles represent ARF proteins in wheat (TaARF); The different colored sectors indicate different groups (or subgroups) of ARF proteins. The different colored arcs indicate different classes of ARF proteins.