FON1

2015-01-20 | Categories genes  | Tags floral  shoot  vegetative  floral organ number  meristem  reproductive  architecture  shoot apical meristem  stem  floral meristem  inflorescence 

• Information
  • Symbol: FON1
  • MSU: LOC_Os06g50340
  • RAPdb: Os06g0717200
• Publication
  • The rice FON1 gene controls vegetative and reproductive development by regulating shoot apical meristem size, 2006, Mol Cells.
  • The gene FLORAL ORGAN NUMBER1 regulates floral meristem size in rice and encodes a leucine-rich repeat receptor kinase orthologous to Arabidopsis CLAVATA1, 2004, Development.
  • Functional diversification of CLAVATA3-related CLE proteins in meristem maintenance in rice, 2008, Plant Cell.
  • The floral organ number4 gene encoding a putative ortholog of Arabidopsis CLAVATA3 regulates apical meristem size in rice, 2006, Plant Physiol.
• Genbank accession number
  • AB182388
• Key message
  • The point muta-tions, fon1-1 and fon1-2, disrupt meristem balance, resulting in alteration of floral organ numbers and the architecture of primary rachis branches
  • SEM analysis showed that the shoot apical meristems of fon1-3 mutants are enlarged
  • The rice FON1 gene controls vegetative and reproductive development by regulating shoot apical meristem size
  • Although floral meristems are strongly affected by the fon1-2 mutation, vegetative and inflorescence meristems are largely normal, even in this strong allele
  • In addition, FON1 transcripts are detected in all meristems responsible for development of the aerial part of rice, suggesting that genes sharing functional redundancy with FON1 act in the vegetative and inflorescence meristems to mask the effects of the fon1 mutation
  • These results indicate that FON1 controls vegetative as well as reproductive development by regulating meristem size
  • Mutations in the gene FLORAL ORGAN NUMBER1 (FON1) cause enlargement of the floral meristem in Oryza sativa (rice), resulting in an increase in the number of all floral organs
  • Unlike CLV1, which is predominantly expressed in the L3 layer of the shoot meristem, FON1 is expressed throughout the whole floral meristem, suggesting that small modifications to the CLV signaling pathway may be required to maintain the floral meristem in rice
  • Rice FON1, which is an ortholog of Clv1, regulates stem cell proliferation and organ initiation
  • FON4 transcripts mainly accumulated in the small group of cells at the apex of the SAMs, whereas the rice ortholog of CLV1 (FON1) is expressed throughout the SAMs, suggesting that the putative FON4 ligand might be sequestered as a possible mechanism for rice meristem regulation
• Connection
  • FCP1~OsCLE402, FON1, Functional diversification of CLAVATA3-related CLE proteins in meristem maintenance in rice, FON1, a putative receptor of FON2, is likely to be unnecessary for these FCP1 functions
  • FON1, FON2~FON4~TG1, Functional diversification of CLAVATA3-related CLE proteins in meristem maintenance in rice, FON1, a putative receptor of FON2, is likely to be unnecessary for these FCP1 functions
  • FON1, FON2~FON4~TG1, The floral organ number4 gene encoding a putative ortholog of Arabidopsis CLAVATA3 regulates apical meristem size in rice, FON4 transcripts mainly accumulated in the small group of cells at the apex of the SAMs, whereas the rice ortholog of CLV1 (FON1) is expressed throughout the SAMs, suggesting that the putative FON4 ligand might be sequestered as a possible mechanism for rice meristem regulation
  • FON1, MOC1, Tiller Bud Formation Regulators MOC3 and MOC1 Cooperatively Promote Tiller Bud Outgrowth by Activating FON1 Expression in Rice., Tiller Bud Formation Regulators MOC3 and MOC1 Cooperatively Promote Tiller Bud Outgrowth by Activating FON1 Expression in Rice.
  • FON1, MOC1, Tiller Bud Formation Regulators MOC3 and MOC1 Cooperatively Promote Tiller Bud Outgrowth by Activating FON1 Expression in Rice., Here, we report that MONOCULM1 (MOC1) and MONOCULM 3/TILLERS ABSENT 1/STERILE AND REDUCED TILLERING 1 (MOC3/TAB1/SRT1), two vital regulators for tiller formation in rice, could physically interact to regulate tiller bud outgrowth through upregulating the expression of FLORAL ORGAN NUMBER1 (FON1), the homolog of CLAVATA1 in rice
  • FON1, MOC1, Tiller Bud Formation Regulators MOC3 and MOC1 Cooperatively Promote Tiller Bud Outgrowth by Activating FON1 Expression in Rice., MOC1 functions as a co-activator of MOC3, which did not directly bind to the FON1 promoter, but could further activate the FON1 expression in the presence of MOC3
  • FON1, MOC1, Tiller Bud Formation Regulators MOC3 and MOC1 Cooperatively Promote Tiller Bud Outgrowth by Activating FON1 Expression in Rice., Accordingly, FON1 is highly expressed at axillary meristems and shows remarkable decreased expression levels in moc1 and moc3 mutants
  • FON1, MOC3~OsWUS~TAB1~OsTAB1, TILLERS ABSENT1, the WUSCHEL ortholog, is not involved in stem cell maintenance in the shoot apical meristem in rice., In addition, misexpression of TAB1 under the promoter of FON1 led to a slight reduction of the SAM size in wild type, suggesting that TAB1 is not a positive regulator of stem cells
  • FON1, REL2~OsDLT10~RSD1, Rice dwarf and low tillering 10 OsDLT10 regulates tiller number by monitoring auxin homeostasis, The expression levels of WUS-like and FON1 were substantially decreased in the Osdlt10 mutants

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