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. 2020 Apr 7;32(6):1973–1987. doi: 10.1105/tpc.20.00101

Figure 8.

Figure 8.

A Work Model Depicting the SnRK2s-APC/CTE Module-Mediated Antagonistic Regulation of Root Growth and Tillering by ABA and GA.

(A) Strong GA signaling can reduce RM size or AM size to restrict root growth or tillering by promoting the APC/CTE-mediated degradation of OsSHR1 (a key RM promoter) in RM or MOC1 (a key AM promoter) in AM through the SnRK2s-APC/CTE regulatory module.

(B) Conversely, moderate enhancement of ABA signaling can maintain RM or AM sizes to sustain root growth or tillering by antagonizing the GA-APC/CTE-promoted degradation pathway to stabilize OsSHR1 in RM or MOC1 in AM through the SnRK2s-APC/CTE regulatory module. In addition, stabilized OsSHR1 can repress the elongation growth of plant height.