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. Author manuscript; available in PMC: 2020 Sep 24.
Published in final edited form as: Curr Opin Plant Biol. 2015 Nov 19;28:144–153. doi: 10.1016/j.pbi.2015.10.009

Figure 1.

Figure 1

Role of auxin signals in leaf pavement cell (PC) interdigitation. (a) A schematic diagram showing the promoting effect of auxin on two antagonistic ROP pathways and PIN1-mediated positive feedback loop in PC interdigitation. (b) A working model of auxin-mediated PC interdigitation. A proposed cell surface ABP1-TMK auxin-sensing complex activates two antagonistic ROP pathways (the ROP2- and ROP6-GTPase pathways) for leaf PC interdigitation. The ROP2-RIC4 interaction promotes lobe outgrowth via actin assembly while the ROP6-RIC1 interaction restricts lobe outgrowth via microtubule organization. PM, plasma membrane; MT, microtubule.