- Information
- Symbol: FON2,FON4,TG1
- MSU: LOC_Os11g38270
- RAPdb: Os11g0595400
- PSP score
- LOC_Os11g38270.1: 0.0074
- PLAAC score
- LOC_Os11g38270.1: 0
- pLDDT score
- NA
- Publication
- FON2 SPARE1 redundantly regulates floral meristem maintenance with FLORAL ORGAN NUMBER2 in rice, 2009, PLoS Genet.
- Functional diversification of CLAVATA3-related CLE proteins in meristem maintenance in rice, 2008, Plant Cell.
- Conservation and diversification of meristem maintenance mechanism in Oryza sativa: Function of the FLORAL ORGAN NUMBER2 gene, 2006, Plant Cell Physiol.
- The floral organ number4 gene encoding a putative ortholog of Arabidopsis CLAVATA3 regulates apical meristem size in rice, 2006, Plant Physiol.
- Mapping and application of the twin-grain1 gene in rice., 2016, Planta.
- Genetic Enhancer Analysis Reveals that FLORAL ORGAN NUMBER2 and OsMADS3 Cooperatively Regulate Maintenance and Determinacy of the Flower Meristem in Rice., 2017, Plant Cell Physiol.
- Genbank accession number
- Key message
- Unlike FON2, which regulates the maintenance of flower and inflorescence meristems, FCP1 appears to regulate the maintenance of the vegetative SAM and RAM
- Likely due to enlarged SAMs, fon4 mutants produced thick culms (stems) and increased numbers of both primary rachis branches and floral organs
- In rice (Oryza sativa), FLORAL ORGAN NUMBER2 (FON2), closely related to CLV3, is involved as a signaling molecule in a similar pathway to negatively regulate stem cell proliferation in the floral meristem (FM)
- FON2 SPARE1 redundantly regulates floral meristem maintenance with FLORAL ORGAN NUMBER2 in rice
- Exogenous application of the peptides FON4p and CLV3p corresponding to the CLV3/ESR-related (CLE) motifs of FON4 and CLV3, respectively, resulted in termination of SAMs in rice, and treatment with CLV3p caused consumption of both rice and Arabidopsis root meristems, suggesting that the CLV pathway in limiting meristem size is conserved in both rice and Arabidopsis
- However, exogenous FON4p did not have an obvious effect on limiting both rice and Arabidopsis root meristems, suggesting that the CLE motifs of Arabidopsis CLV3 and FON4 are potentially functionally divergent
- The fon4 mutants showed abnormal enlargement of the embryonic and vegetative shoot apical meristems (SAMs) and the inflorescence and floral meristems
- To elucidate the genetic mechanism that regulates meristem maintenance in monocots, here we have examined the function of the gene FLORAL ORGAN NUMBER2 (FON2) in Oryza sativa (rice)
- To understand the molecular mechanism regulating meristem development in the monocot rice (Oryza sativa), we describe here the isolation and characterization of three floral organ number4 (fon4) alleles and the cloning of the FON4 gene
- Constitutive expression of FON2 also causes premature termination of the shoot apical meristem in Arabidopsis, a phenotype similar to that caused by constitutive expression of CLV3
- Constitutive expression of FON2 causes a reduction in the number of floral organs and flowers, suggesting that both the flower and inflorescence meristems are reduced in size
- 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
- Mutations in FON2 cause enlargement of the floral meristem, resulting in an increase in the number of floral organs, although the vegetative and inflorescence meristems are largely normal
- Genetic analysis revealed that FOS1 does not need FON1, the putative receptor of FON2, for its action, suggesting that FOS1 and FON2 may function in meristem maintenance as signaling molecules in independent pathways
- Here, we report that two proteins closely related to CLAVATA3, FLORAL ORGAN NUMBER2 (FON2) and FON2-LIKE CLE PROTEIN1 (FCP1/Os CLE402), have functionally diversified to regulate the different types of meristem in rice (Oryza sativa)
- FON2 transcripts are localized at the apical region in all meristems in the aerial parts of rice plants, showing an expression pattern similar to that of Arabidopsis CLV3
- Together with our previous study of FON1, these results clearly indicate that the FON1-FON2 system in rice corresponds to the CLV signaling system in Arabidopsis and suggest that the negative regulation of stem cell identity by these systems may be principally conserved in a wide range of plants within the Angiosperms
- In addition, we propose a model of the genetic regulation of meristem maintenance in rice that includes an alternative pathway independent of FON2-FON1
- The mapping results showed that TG1 is allelic to FLORAL ORGAN NUMBER2 (FON2)/FLORAL ORGAN NUMBER4 (FON4), a flower organ number gene located at 88
- The novel tg1 gene allele was introgressed into the cytoplasmic male sterility (CMS) line Zhejing 22A, giving rise to a new CMS line Zhejing 22-tg1A
- The results implied great potentials for the tg1 gene inÃÂ hybridÃÂ rice breeding
- Disruption of OsMADS3 in the fon2 mutant by CRISPR-Cas9 technology caused a flower phenotype similar to that of 2B-424, confirming that the gene responsible for enhancement of fon2 was OsMADS3
- Morphological analysis showed that the fon2 and osmads3 mutations synergistically affected pistil development and FM determinacy
- In fon2 mutants, the numbers of floral organs are increased due to an enlargement of the FM
- To identify new factors regulating meristem maintenance in rice, we performed a genetic screening of mutants that enhanced the fon2 mutation, and found a mutant line (2B-424) in which pistil number was dramatically increased
- Connection
- FON2~FON4~TG1, FOS1, FON2 SPARE1 redundantly regulates floral meristem maintenance with FLORAL ORGAN NUMBER2 in rice, Here we show that the FON2 SPARE1 (FOS1) gene encoding a CLE protein functions along with FON2 in maintenance of the FM
- FON2~FON4~TG1, FOS1, FON2 SPARE1 redundantly regulates floral meristem maintenance with FLORAL ORGAN NUMBER2 in rice, Genetic analysis revealed that FOS1 does not need FON1, the putative receptor of FON2, for its action, suggesting that FOS1 and FON2 may function in meristem maintenance as signaling molecules in independent pathways
- FON2~FON4~TG1, FOS1, FON2 SPARE1 redundantly regulates floral meristem maintenance with FLORAL ORGAN NUMBER2 in rice, Sequence comparison of FOS1 in about 150 domesticated rice and wild rice species indicates that this FNP is present only in japonica, suggesting that redundant regulation by FOS1 and FON2 is commonplace in species in the Oryza genus
- FCP1~OsCLE402, FON2~FON4~TG1, Functional diversification of CLAVATA3-related CLE proteins in meristem maintenance in rice, Here, we report that two proteins closely related to CLAVATA3, FLORAL ORGAN NUMBER2 (FON2) and FON2-LIKE CLE PROTEIN1 (FCP1/Os CLE402), have functionally diversified to regulate the different types of meristem in rice (Oryza sativa)
- FCP1~OsCLE402, FON2~FON4~TG1, Functional diversification of CLAVATA3-related CLE proteins in meristem maintenance in rice, Unlike FON2, which regulates the maintenance of flower and inflorescence meristems, FCP1 appears to regulate the maintenance of the vegetative SAM and RAM
- FCP1~OsCLE402, 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
- FCP1~OsCLE402, FON2~FON4~TG1, Functional diversification of CLAVATA3-related CLE proteins in meristem maintenance in rice, Furthermore, we identify a key amino acid residue that discriminates between the actions of FCP1 and FON2
- 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
- FON2~FON4~TG1, OSMADS3, Genetic Enhancer Analysis Reveals that FLORAL ORGAN NUMBER2 and OsMADS3 Cooperatively Regulate Maintenance and Determinacy of the Flower Meristem in Rice., Disruption of OsMADS3 in the fon2 mutant by CRISPR-Cas9 technology caused a flower phenotype similar to that of 2B-424, confirming that the gene responsible for enhancement of fon2 was OsMADS3
- FON2~FON4~TG1, OSMADS3, Genetic Enhancer Analysis Reveals that FLORAL ORGAN NUMBER2 and OsMADS3 Cooperatively Regulate Maintenance and Determinacy of the Flower Meristem in Rice., Morphological analysis showed that the fon2 and osmads3 mutations synergistically affected pistil development and FM determinacy
- FON2~FON4~TG1, OsMADS34~PAP2, Regulatory network and genetic interactions established by OsMADS34 in rice inflorescence and spikelet morphogenesis., Genetic analysis revealed that OsMADS34 controls different aspects of inflorescence structure, branching and meristem activity synergistically with LAX PANICLE1 (LAX1) and FLORAL ORGAN NUMBER4 (FON4), as evidenced by the enhanced phenotypes of osmads34 lax1 and osmads34 fon4 compared with the single mutants
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