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. 2015 Aug 25;27(9):2469–2483. doi: 10.1105/tpc.15.00227

Figure 9.

Figure 9.

Proposed Models for ERF3, WOX11, and RR2 Expression Patterns and Their Functions in Controlling Crown Root Initiation and Elongation in Rice.

(A) Model of ERF3, WOX11, and RR2 expression patterns during crown root formation.

(B) Model of ERF3, WOX11, and RR2 functions controlling crown root initiation and elongation in rice.

During crown root initiation, ERF3 repressed cytokinin signaling by directly activating RR2 expression. During crown root elongation, WOX11 expression was turned on. WOX11-ERF3 interaction either enhances WOX11-mediated repression or inhibits ERF3-mediated activation of RR2, leading to cytokinin signaling activation and thereby promoting crown root growth.