Gene Details:

• MSU gene ID: LOC_Os04g52280
• RAPdb gene ID: Os04g0612700
• Gene Symbol: FC1 OsCAD7
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• We found that the increased tillering phenotype of fine culm1 (FC1) mutants of rice is not rescued by the application of 1 microM GR24, a synthetic SL analog.
• Treatment with a high concentration of GR24 (10 microM) causes suppression of tiller growth in wild-type plants, but is not effective on FC1 mutants, implying that proper FC1 functioning is required for SLs to inhibit bud growth.
• Overexpression of FC1 partially rescued d3-2 defects in the tiller growth and plant height.
• An in situ hybridization analysis showed that FC1 mRNA accumulates in axillary buds, the shoot apical meristem, young leaves, vascular tissues and the tips of crown roots.
• We propose that FC1 acts as an integrator of multiple signaling pathways and is essential to the fine-tuning of shoot branching in rice.
• To understand the molecular mechanisms that control culm mechanical strength, we identified a flexible culm1 (FC1) mutant by screening a rice T-DNA insertion mutant library.
• In this study, we cloned the FLEXIBLE CULM1 (FC1) gene in rice using a T-DNA tagging approach.
• Our results indicated that FC1 plays an important role in the biosynthesis of lignin and the control of culm strength in rice.
• On the other hand, the expression level of FC1 is negatively regulated by cytokinin treatment.
• FINE CULM1 (FC1) works downstream of strigolactones to inhibit the outgrowth of axillary buds in rice.
• FC1 encodes a cinnamyl-alcohol dehydrogenase and is mainly expressed in the sclerenchyma cells of the secondary cell wall and vascular bundle region.
• In these types of cells, a deficiency of FC1 in the FC1 mutant caused a reduction in cell wall thickness, as well as a decrease in lignin.
• Further histological and biochemical analyses revealed that the p-hydroxyphenyl and guaiacyl monomers in FC1 cell wall were reduced greatly.
• Extracts from the first internodes and panicles of the FC1 plants exhibited drastically reduced cinnamyl-alcohol dehydrogenase activity.

Function-related keywords:

• tiller ,  shoot ,  crown-root ,  culm ,  height ,  cytokinin ,  branching ,  strigolactone ,  cell-wall ,  panicle ,  meristem ,  shoot-apical-meristem ,  vascular-bundle ,  growth ,  tillering ,  crown ,  root

Literature:

• FLEXIBLE CULM 1 encoding a cinnamyl-alcohol dehydrogenase controls culm mechanical strength in rice .  DOI:  10.1007/s11103-008-9448-8 ;  PMID:  19116760
• FINE CULM1 (FC1) works downstream of strigolactones to inhibit the outgrowth of axillary buds in rice .  DOI:  10.1093/pcp/pcq083 ;  PMID:  20547591

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: