Figure 7.

Model Summarizing the Roles of ARF8 and BPEp in the Regulation of Petal Development.

This model shows the action of ARF8 in restricting cell proliferation at early flower development stages and of ARF8 and BPEp in limiting cell expansion at late development stages. The synergistic interaction between BPEp and ARF8 in early petal development is indicated with a dashed arrow. The role of jasmonate signaling in the regulation of BPEp expression has been reported (Brioudes et al., 2009). The second transcript BPEub originating from the BPE gene (Szécsi et al., 2006) is shown. BPEp and ARF8 proteins are presented as boxes.