Gene Details:

• MSU gene ID: LOC_Os03g43930
• RAPdb gene ID: Os03g0640800
• Gene Symbol: OSHB4 OsHox32
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Direct regulation of other transcription factor genes like OSHB4 (a class III homeodomain Leu zipper member), OsBLH1 (a BEL1-like homeodomain member), OsKANADI2, OsKANADI4, and OsETTIN2 show its role in meristem maintenance, determinacy, and lateral organ development.
• Four genes, OSHB1 to OSHB4, were expressed in a localized domain of the shoot apical meristem (SAM), the adaxial cells of leaf primordia, the leaf margins, and the xylem tissue of vascular bundles.
• Overexpression of OsHox32 Results in Pleiotropic Effects on Plant Type Architecture and Leaf Development in Rice.
• OsHox32 exhibited constitutive expression in different organs, with higher mRNA levels in the stem, leaf sheath, shoot apical meristems and young roots, suggesting a role in plant-type and leaf development.
• mRNA level of six rice YABBY genes is up-regulated or down-regulated by OsHox32, suggesting that OsHox32 may regulate the architecture of plant type and leaf development by controlling the expression of YABBY genes in rice.
• Molecular analyses revealed OSHB4, a member of HD-Zip III gene family, as a major target of miR166 and overexpression of miR166-resistant OSHB4 resulted in rice plants resembling the STTM166 lines, including leaf rolling and higher drought resistance.
• Overexpression of miR166b (OE166b) in rice plants or knocking down of OsHox32 by RNA interference (RNAiHox32) led to increased thickness of cell walls and enhanced mechanical strength of culms.

Function-related keywords:

• transcription-factor ,  meristem ,  vascular-bundle ,  xylem ,  shoot ,  leaf ,  shoot-apical-meristem ,  leaf-development ,  development ,  architecture ,  resistance ,  drought ,  drought-resistance ,  leaf-rolling ,  cell-wall

Literature:

• Rice LHS1/OsMADS1 controls floret meristem specification by coordinated regulation of transcription factors and hormone signaling pathways .  DOI:  10.1104/pp.112.212423 ;  PMID:  23449645
• Developmental role and auxin responsiveness of Class III homeodomain leucine zipper gene family members in rice .  DOI:  10.1104/pp.108.118679 ;  PMID:  18567825
• Overexpression of OsHox32 Results in Pleiotropic Effects on Plant Type Architecture and Leaf Development in Rice .  DOI:  10.1186/s12284-016-0118-1 ;  PMID:  27624698
• Knockdown of Rice MicroRNA166 Confers Drought Resistance by Causing Leaf Rolling and Altering Stem Xylem Development .  DOI:  10.1104/pp.17.01432 ;  PMID:  29367235
• The OsmiRNA166b-OsHox32 pair regulates mechanical strength of rice plants by modulating cell wall biosynthesis .  DOI:  10.1111/pbi.13565 ;  PMID:  33560572

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: