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Author Zhao Y., Cheng S., Song Y., Huang Y., Zhou S., Liu X., Zhou D.X.
Title The Interaction between Rice ERF3 and WOX11 Promotes crown root Development by Regulating Gene Expression Involved in Cytokinin Signaling.
Abstract:
Crown roots are the main components of the fibrous root system in rice (Oryza sativa). WOX11, a WUSCHEL-related homeobox gene specifically expressed in the emerging crown root meristem, is a key regulator in crown root development. However, the nature of WOX11 function in crown root development has remained elusive. Here, we identified a rice AP2/ERF protein, ERF3, which interacts with WOX11 and was expressed in crown root initials and during crown root growth. Functional analysis revealed that ERF3 was essential for crown root development and acts in auxin- and cytokinin-responsive gene expression. Downregulation of ERF3 in WOX11 mutants produced a more severe root phenotype. Also, increased expression of ERF3 could partially complement WOX11, indicating that the two genes functioned cooperatively to regulate crown root development. ERF3 and WOX11 shared a common target, the cytokinin-responsive gene RR2. The expression of ERF3 and WOX11 only partially overlapped, underlining a spatio-temporal control of RR2 expression and crown root development. Furthermore, ERF3-regulated RR2 expression was involved in crown root initiation, while the ERF3/WOX11 interaction likely repressed RR2 during crown root elongation. These results define a mechanism regulating gene expression involved in cytokinin signaling during different stages of crown root development in rice.
Journal Plant Cell
Country China
Volume
Pages
Year 2015
PubMed ID 26307379
PubMed Central ID -
DOI 10.1105/tpc.15.00227
URL -
Relation
Gene CRL1 CRL4 ERF3 IAA23 IAA31 IAA5 PLT8 RR1 RR2 RR3 WOX11
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
-
Stages in Each Organ
- Muant Lines (Gene)
-
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase