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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Plant J. 2014 Oct 1;80(4):629–641. doi: 10.1111/tpj.12658

Figure 7. A model of ARF3 in FM determinacy.

Figure 7

ARF3 terminates the floral stem cells by directly or indirectly repressing WUS expression. Besides the direct repression of WUS by AG through the recruitment of PcG to WUS and the indirect repression of WUS through the activation of KNU expression (Sun et al., 2009; Liu et al., 2011), AG indirectly enhances ARF3 expression and promotes ARF3 binding to the WUS locus. As a target gene repressed by AP2, ARF3 partially mediates the FM maintenance function of AP2. Red and green arrows indicate positive and negative effects, respectively. Solid and dotted arrows indicate direct and indirect effects, respectively. ARF3 is likely to have a direct effect on WUS expression, but this has not been definitively proven in vivo, thus a dotted arrow is used.