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Author Zhou, Dao-Xiu
Title A WUSCHEL-LIKE HOMEOBOX Gene Represses a YABBY Gene Expression Required for Rice Leaf Development.
Abstract:
YABBY and WUSCHEL-LIKE HOMEOBOX (WOX) genes have been shown to play important roles in lateral organ formation and meristem function. Here, we report the characterization of functional relationship between rice (Oryza sativa) YAB3 and WOX3 in rice leaf development. Rice YAB3 is closely related to maize (Zea mays) ZmYAB14 and Arabidopsis (Arabidopsis thaliana) FILAMENTOUS FLOWER (FIL), whereas rice WOX3 is highly conserved with maize narrow sheath1 (NS1) and NS2 and Arabidopsis PRESSED FLOWER (PRS). In situ hybridization experiments revealed that the expression of both genes was excluded from the shoot apical meristem, but the transcripts were detected in leaf primordia, young leaves, and reproductive organs without any polar distribution. The function of the two genes was studied by both overexpression and RNA interference (RNAi) in transgenic rice. YAB3 RNAi induced twisted and knotted leaves lacking specialized structures such as ligule and auricles, while no phenotypic change was observed in YAB3 overexpression plants, suggesting that rice YAB3 may be required for leaf cell growth and differentiation. Overexpression of WOX3 repressed YAB3 and showed a YAB3 RNAi phenotype. The expression of class I KNOTTED-LIKE HOMEOBOX (KNOX) genes was ectopically induced in leaves of YAB3 RNAi or WOX3 overexpression plants. Data from inducible WOX3 expression and DNA-protein interaction assays suggested that WOX3 acted as a transcriptional repressor of YAB3. These data reveal a regulatory network involving YAB3, WOX3, and KNOX genes required for rice leaf development.
Journal Plant Physiol.
Country China
Volume 144(1)
Pages 380-390
Year 2007
PubMed ID 17351053
PubMed Central ID -
DOI 10.1104/pp.107.095737
URL -
Relation
Gene DWT1 GL1 NAL2 NAL3 QHB SH1 WOX1 WOX10 WOX11 WOX4 WOX5 WOX6 WOX8 YAB1 YAB3 YAB4 YAB5 YAB6
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
-
Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase