- Information
- Symbol: LAX1
- MSU: LOC_Os01g61480
- RAPdb: Os01g0831000
- Publication
- The LAX1 and FRIZZY PANICLE 2 genes determine the inflorescence architecture of rice by controlling rachis-branch and spikelet development, 2001, Dev Biol.
- Two-Step Regulation of LAX PANICLE1 Protein Accumulation in Axillary Meristem Formation in Rice, 2009, Plant Cell.
- LAX PANICLE2 of rice encodes a novel nuclear protein and regulates the formation of axillary meristems, 2011, Plant Cell.
- LAX and SPA: major regulators of shoot branching in rice, 2003, Proc Natl Acad Sci U S A.
- OsMADS32 Regulates Rice Floral Patterning through Interactions with Multiple Floral Homeotic Genes, 2020, J Exp Bot.
- Genbank accession number
- Key message
- In addition to its role in forming lateral meristems, the wild-type LAX1 gene acts as a floral meristem identity gene which specifies the terminal spikelet meristem
- LAX1 mRNA accumulates in two to three layers of cells in the boundary region between the initiating AM and the shoot apical meristem
- In lax1 mutants, the proliferation of meristematic cells is initiated but fails to progress into the formation of AM
- In situ hybridization analysis using OSH1, a rice knotted1 (kn1) ortholog, confirmed the absence of lateral meristems in lax1-2 panicles
- These defects indicate that the LAX1 gene is required for the initiation/maintenance of axillary meristems in the rice panicle
- A comparison of the defects in lax1-1 and lax1-2 plants suggested that the sensitivities to reduced LAX1 activity were not uniform among different types of meristems
- The LAX1 and FRIZZY PANICLE 2 genes determine the inflorescence architecture of rice by controlling rachis-branch and spikelet development
- In lax1-2, which is a new and stronger allele of the previously reported lax mutant, initiation and/or maintenance of rachis-branches, lateral spikelets, and terminal spikelets was severely prevented
- In rice (Oryza sativa), LAX PANICLE1 (LAX1) function is required for the generation of AM throughout the plant’s lifespan
- The lax2 mutant is similar to lax panicle1 (lax1) in that it lacks an AM in most of the lateral branching of the panicle and has a reduced number of AMs at the vegetative stage
- The lax1 lax2 double mutant synergistically enhances the reduced-branching phenotype, indicating the presence of multiple pathways for branching
- Connection
- Gnp4~LAX2, LAX1, LAX PANICLE2 of rice encodes a novel nuclear protein and regulates the formation of axillary meristems, The lax2 mutant is similar to lax panicle1 (lax1) in that it lacks an AM in most of the lateral branching of the panicle and has a reduced number of AMs at the vegetative stage
- Gnp4~LAX2, LAX1, LAX PANICLE2 of rice encodes a novel nuclear protein and regulates the formation of axillary meristems, The lax1 lax2 double mutant synergistically enhances the reduced-branching phenotype, indicating the presence of multiple pathways for branching
- Gnp4~LAX2, LAX1, LAX PANICLE2 of rice encodes a novel nuclear protein and regulates the formation of axillary meristems, LAX2 encodes a nuclear protein that contains a plant-specific conserved domain and physically interacts with LAX1
- Gnp4~LAX2, LAX1, LAX PANICLE2 of rice encodes a novel nuclear protein and regulates the formation of axillary meristems, We propose that LAX2 is a novel factor that acts together with LAX1 in rice to regulate the process of AM formation
- LAX1, RFL~APO2~SSC~LFY, Functions for rice RFL in vegetative axillary meristem specification and outgrowth., We show that RFL promotes AM specification through its effects on LAX1 and CUC genes, as their expression was modulated on RFL knockdown, on induction of RFL:GR fusion protein, and by a repressive RFL-EAR fusion protein
- LAX1, RFL~APO2~SSC~LFY, Functions for rice RFL in vegetative axillary meristem specification and outgrowth., Together, we have found that RFL regulates the LAX1 and CUC genes during AM specification, and positively influences the outgrowth of AMs though its effects on auxin transport
- LAX1, 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
- LAX1, OsRA2, OsRAMOSA2 Shapes Panicle Architecture through Regulating Pedicel Length., Genetic analysis revealed that OsRA2 may control panicle architecture using the same pathway as that of the axillary meristem gene LAX1 (LAX PANICLE1)
- LAX1, OsPID~OsPINOID, PINOID regulates floral organ development by modulating auxin transport and interacts with MADS16 in rice., Together, we propose a model that OsPID regulates floral organ development by modulating auxin polar transport and interaction with OsMADS16 and/or LAX1 in rice
- LAX1, OsPIN1c, Auxin Efflux Transporters OsPIN1c and OsPIN1d Function Redundantly in Regulating Rice Oryza sativa L. Panicle Development., Additionally, several critical regulators of reproductive development, such as OsPID, LAX1, OsMADS1, and OsSPL14/IPA1, were differentially expressed in ospin1c-1 ospin1d-1, supporting the hypothesis that OsPIN1c and OsPIN1d are involved in regulating panicle development
- LAX1, OsPIN1d, Auxin Efflux Transporters OsPIN1c and OsPIN1d Function Redundantly in Regulating Rice Oryza sativa L. Panicle Development., Additionally, several critical regulators of reproductive development, such as OsPID, LAX1, OsMADS1, and OsSPL14/IPA1, were differentially expressed in ospin1c-1 ospin1d-1, supporting the hypothesis that OsPIN1c and OsPIN1d are involved in regulating panicle development
- LAX1, OsbHLH067, OsbHLH067, OsbHLH068, and OsbHLH069 redundantly regulate inflorescence axillary meristem formation in rice., OsbHLH067, OsbHLH068, and OsbHLH069 were preferentially expressed in the developing inflorescence AMs and their proteins could physically interact with LAX1
- LAX1, OsbHLH068, OsbHLH067, OsbHLH068, and OsbHLH069 redundantly regulate inflorescence axillary meristem formation in rice., OsbHLH067, OsbHLH068, and OsbHLH069 were preferentially expressed in the developing inflorescence AMs and their proteins could physically interact with LAX1
- LAX1, OsbHLH069, OsbHLH067, OsbHLH068, and OsbHLH069 redundantly regulate inflorescence axillary meristem formation in rice., OsbHLH067, OsbHLH068, and OsbHLH069 were preferentially expressed in the developing inflorescence AMs and their proteins could physically interact with LAX1
- LAX1, OsDPE2, OsDPE2 Regulates Rice Panicle Morphogenesis by Modulating the Content of Starch., Herein, results showed that Oryza sativa Disproportionating Enzyme 2 (OsDPE2) could rescue the mutant phenotype of lax1-6, LAX1 mutant
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