D61,OsBRI1,OsBRKq1,HFR131

2015-01-20 | Categories genes  | Tags growth  grain size  dwarf  grain  erect  lamina  leaf  brassinosteroid  shoot  cell division  photosynthesis  seed  BR  intercalary meristem  root  meristem  yield  reproductive  BR signaling  grain yield  biomass  panicle  grain length  Brassinosteroid  grain weight  grain width  receptor kinase  BR  architecture  plant architecture  Kinase  kinase  auxin  breeding  auxin response  height  plant height 

• Information
  • Symbol: D61,OsBRI1,OsBRKq1,HFR131
  • MSU: LOC_Os01g52050
  • RAPdb: Os01g0718300
• Publication
  • OsBLE3, a brassinolide-enhanced gene, is involved in the growth of rice, 2006, Phytochemistry.
  • Kinase activity of OsBRI1 is essential for brassinosteroids to regulate rice growth and development, 2013, Plant Sci.
  • Small and round seed 5 gene encodes alpha-tubulin regulating seed cell elongation in rice, 2012, Rice (N Y).
  • H3K36 methylation is critical for brassinosteroid-regulated plant growth and development in rice, 2012, Plant J.
  • Loss of function of a rice brassinosteroid insensitive1 homolog prevents internode elongation and bending of the lamina joint, 2000, Plant Cell.
  • RAV-Like1 maintains brassinosteroid homeostasis via the coordinated activation of BRI1 and biosynthetic genes in rice, 2010, Plant Cell.
  • BRASSINOSTEROID UPREGULATED1, encoding a helix-loop-helix protein, is a novel gene involved in brassinosteroid signaling and controls bending of the lamina joint in rice, 2009, Plant Physiol.
  • The role of OsBRI1 and its homologous genes, OsBRL1 and OsBRL3, in rice, 2006, Plant Physiol.
  • Morphological alteration caused by brassinosteroid insensitivity increases the biomass and grain production of rice, 2006, Plant Physiol.
  • RPL1, a gene involved in epigenetic processes regulates phenotypic plasticity in rice, 2012, Mol Plant.
  • Gene Expression Dynamics in Rice Peduncles at the Heading Stage, 2020, Front Genet.
  • OrMKK3 Influences Morphology and Grain Size in Rice, 2021, J Plant Biol.
  • Regulation of Brassinosteroid Signaling and Salt Resistance by SERK2 and Potential Utilization for Crop Improvement in Rice, 2020, Front Plant Sci.
  • OsBRKq1, Related Grain Size Mapping, and Identification of Grain Shape Based on QTL Mapping in Rice, 2021, Int J Mol Sci.
  • BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., 2022, J Exp Bot.
  • The identification and characterization of a plant height and grain length related gene hfr131 in rice., 2023, Front Plant Sci.
• Genbank accession number
  • AK073838
• Key message
  • Our results show that OsBRI1 functions in various growth and developmental processes in rice, including (1) internode elongation, by inducing the formation of the intercalary meristem and the longitudinal elongation of internode cells; (2) bending of the lamina joint; and (3) skotomorphogenesis
  • However, the small grain size of d61-7 counters any increase in grain yield, leading to the same grain yield as that of wild type even at high density
  • The rice (Oryza sativa) dwarf mutant d61 phenotype is caused by loss of function of a rice BRASSINOSTEROID INSENSITIVE1 ortholog, OsBRI1
  • We have identified nine d61 alleles, the weakest of which, d61-7, confers agronomically important traits such as semidwarf stature and erect leaves
  • The biomass of wild type was 38% higher than that of d61-7 at harvest under conventional planting density because of the dwarfism of d61-7
  • We therefore produced transgenic rice with partial suppression of endogenous OsBRI1 expression to obtain the erect-leaf phenotype without grain changes
  • Because erect-leaf habit is considered to increase light capture for photosynthesis, we compared the biomass and grain production of wild-type and d61-7 rice
  • We report here the phenotypical and molecular characterization of a rice dwarf mutant, d61, that is less sensitive to BR compared to the wild type
  • Through map-based cloning, Fn189 was found to be a novel allelic mutant of the DWARF 61 (D61) gene, which encodes the putative BRs receptor OsBRI1
  • Taken together, the kinase activity of OsBRI1 is essential for brassinosteroids to regulate normal plant growth and development in rice
  • Kinase activity of OsBRI1 is essential for brassinosteroids to regulate rice growth and development
  • In contrast to its severe shoot phenotype, the d61-4 mutant had a mild root phenotype
  • The homologous genes for OsBRI1, OsBRL1 and OsBRL3, were highly expressed in roots but weakly expressed in shoots, and their expression was higher in d61-4 than in the wild type
  • Based on these observations, we conclude that OsBRI1 is not essential for pattern formation or organ initiation, but is involved in organ development through controlling cell division and elongation
  • The most severe mutant, d61-4, exhibited severe dwarfism and twisted leaves, although pattern formation and differentiation were normal
  • Analysis of the putative rice brassinosteroid receptor OsBRI1, a key hormone signaling gene, indicated that RPL1 may be involved in the regulation of epigenomic modification of the gene
  • The grain yield of wild type reached a maximum at middensity, but the yield of d61-7 continued to increase with planting density
  • Since first identifying two alleles of a rice (Oryza sativa) brassinosteroid (BR)-insensitive mutant, d61, that were also defective in an orthologous gene in Arabidopsis (Arabidopsis thaliana) BRASSINOSTEROID INSENSITIVE1 (BRI1), we have isolated eight additional alleles, including null mutations, of the rice BRI1 gene OsBRI1
  • Mutants defective in the G-protein alpha subunit (d1-1) and brassinosteroid receptor, BRI1 (d61-2) also exhibited short seed phenotypes, the former due to impaired cell numbers and the latter due to impaired cell length
  • Seeds of the double mutant of Srs5 and d61-2 were smaller than those of Srs5 or d61-2
  • We cloned a rice gene, OsBRI1, with extensive sequence similarity to that of the Arabidopsis BRI gene, which encodes a putative BR receptor kinase
  • These results indicate that BU1 protein is a positive regulator of BR response: it controls bending of the lamina joint in rice and it is a novel primary response gene that participates in two BR signaling pathways through OsBRI1 and RGA1
  • In addition, compared to the wild type, the induction of BU1 by exogenous brassinolide did not require de novo protein synthesis and it was weaker in a BR receptor mutant OsbriI (Oryza sativa brassinosteroid insensitive1, d61) and a rice G protein alpha subunit (RGA1) mutant d1
  • These results indicate that d61-7 produces biomass more effectively than wild type, and consequently more effectively assimilates the biomass in reproductive organ development at high planting density
  • However, the biomass of d61-7 was 35% higher than that of wild type at high planting density
  • Among the SNDH populations, the analysis of the relative expression level during the panicle formation stage of OsBRKq1 in panicles of SNDH117, which has the largest grain size, and SNDH6, which has the smallest grain size, the relative expression level was significantly increased in SNDH117 panicles
  • Grain sizes were diversely distributed in SNDH 113 populations, and OsBRKq1 was detected on chromosome 1 in an analysis of QTL mapping that used 1000 grain weight, grain length, and grain width
  • In the future, OsBRKq1 can be effectively used to increase the yield of rice and solve food problems by increasing the size of seeds
  • OsBRKq1 exhibited high sequence similarity with the brassinosteroid leucine-rich repeat-receptor kinases of Arabidopsis thaliana and Zea mays
  • Together, our results suggest that OsBSK1-1 may serve as a scaffold protein directly bridging OsBRI1 and OsGSK2 to positively regulate BR signalling, thus affecting plant architecture and grain size in rice
  • Moreover, we showed that OsBSK1-1 can be phosphorylated by OsBRI1 and can inhibit OsGSK2-mediated phosphorylation of BRASSINOSTEROID RESISTANT1 (OsBZR1)
  • Further study showed that hfr131 is a new allele of OsBRI1 with a single-nucleotide polymorphism (G to A) in the coding region, leading to a T988I conversion at a conserved site of the kinase domain
  • The identification and characterization of a plant height and grain length related gene hfr131 in rice.
  • By combining yeast one-hybrid assays, chromatin immunoprecipitation-quantitative PCR and gene expression quantification, we demonstrated that OsARF17, an auxin response factor, could bind to the promoter region of HFR131 and positively regulated HFR131 expression, thereby regulating the plant height and grain length, and influencing brassinosteroid sensitivity
  • Overall, this study identified hfr131 as a new allele of OsBRI1 that regulates plant height and grain length in rice, revealed that brassinosteroid and auxin might coordinate through OsARF17-HFR131 interaction, and provided a potential breeding target for improvement of rice yield
• Connection
  • D61~OsBRI1~OsBRKq1~HFR131, OsBLE3, OsBLE3, a brassinolide-enhanced gene, is involved in the growth of rice, In OsBRI1 antisense transgenic rice and OsBLE3, the BR-insensitive mutant expression of OsBLE3 in response to exogenous BL treatment was significantly lower compared to that in control plants transformed with a vacant vector
  • D61~OsBRI1~OsBRKq1~HFR131, TID1~SRS5~OsTubA2, Small and round seed 5 gene encodes alpha-tubulin regulating seed cell elongation in rice, Seeds of the double mutant of Srs5 and d61-2 were smaller than those of Srs5 or d61-2
  • D61~OsBRI1~OsBRKq1~HFR131, TID1~SRS5~OsTubA2, Small and round seed 5 gene encodes alpha-tubulin regulating seed cell elongation in rice, Furthermore, SRS5 and BRI1 genes were highly expressed in Srs5 and d61-2 mutants
  • BU1~OsbHLH174, D61~OsBRI1~OsBRKq1~HFR131, H3K36 methylation is critical for brassinosteroid-regulated plant growth and development in rice, Consistently, transcriptome analyses revealed that SDG725 depletion results in down-regulation by more than two-fold of over 1000 genes, including D11, BRI1 and BU1, which are known to be involved in brassinosteroid biosynthesis or signaling pathways
  • D61~OsBRI1~OsBRKq1~HFR131, SDG725, H3K36 methylation is critical for brassinosteroid-regulated plant growth and development in rice, Consistently, transcriptome analyses revealed that SDG725 depletion results in down-regulation by more than two-fold of over 1000 genes, including D11, BRI1 and BU1, which are known to be involved in brassinosteroid biosynthesis or signaling pathways
  • D11~CPB1~CYP724B1~GNS4~PMM1, D61~OsBRI1~OsBRKq1~HFR131, H3K36 methylation is critical for brassinosteroid-regulated plant growth and development in rice, Consistently, transcriptome analyses revealed that SDG725 depletion results in down-regulation by more than two-fold of over 1000 genes, including D11, BRI1 and BU1, which are known to be involved in brassinosteroid biosynthesis or signaling pathways
  • BU1~OsbHLH174, D61~OsBRI1~OsBRKq1~HFR131, BRASSINOSTEROID UPREGULATED1, encoding a helix-loop-helix protein, is a novel gene involved in brassinosteroid signaling and controls bending of the lamina joint in rice, In addition, compared to the wild type, the induction of BU1 by exogenous brassinolide did not require de novo protein synthesis and it was weaker in a BR receptor mutant OsbriI (Oryza sativa brassinosteroid insensitive1, d61) and a rice G protein alpha subunit (RGA1) mutant d1
  • BU1~OsbHLH174, D61~OsBRI1~OsBRKq1~HFR131, BRASSINOSTEROID UPREGULATED1, encoding a helix-loop-helix protein, is a novel gene involved in brassinosteroid signaling and controls bending of the lamina joint in rice, These results indicate that BU1 protein is a positive regulator of BR response: it controls bending of the lamina joint in rice and it is a novel primary response gene that participates in two BR signaling pathways through OsBRI1 and RGA1
  • D1~RGA1~LW5, D61~OsBRI1~OsBRKq1~HFR131, BRASSINOSTEROID UPREGULATED1, encoding a helix-loop-helix protein, is a novel gene involved in brassinosteroid signaling and controls bending of the lamina joint in rice, In addition, compared to the wild type, the induction of BU1 by exogenous brassinolide did not require de novo protein synthesis and it was weaker in a BR receptor mutant OsbriI (Oryza sativa brassinosteroid insensitive1, d61) and a rice G protein alpha subunit (RGA1) mutant d1
  • D1~RGA1~LW5, D61~OsBRI1~OsBRKq1~HFR131, BRASSINOSTEROID UPREGULATED1, encoding a helix-loop-helix protein, is a novel gene involved in brassinosteroid signaling and controls bending of the lamina joint in rice, These results indicate that BU1 protein is a positive regulator of BR response: it controls bending of the lamina joint in rice and it is a novel primary response gene that participates in two BR signaling pathways through OsBRI1 and RGA1
  • D61~OsBRI1~OsBRKq1~HFR131, OsBRL1, The role of OsBRI1 and its homologous genes, OsBRL1 and OsBRL3, in rice, The homologous genes for OsBRI1, OsBRL1 and OsBRL3, were highly expressed in roots but weakly expressed in shoots, and their expression was higher in d61-4 than in the wild type
  • D61~OsBRI1~OsBRKq1~HFR131, OsBRL1, The role of OsBRI1 and its homologous genes, OsBRL1 and OsBRL3, in rice, The role of OsBRI1 and its homologous genes, OsBRL1 and OsBRL3, in rice
  • D61~OsBRI1~OsBRKq1~HFR131, OsBRL3, The role of OsBRI1 and its homologous genes, OsBRL1 and OsBRL3, in rice, The homologous genes for OsBRI1, OsBRL1 and OsBRL3, were highly expressed in roots but weakly expressed in shoots, and their expression was higher in d61-4 than in the wild type
  • D61~OsBRI1~OsBRKq1~HFR131, OsBRL3, The role of OsBRI1 and its homologous genes, OsBRL1 and OsBRL3, in rice, The role of OsBRI1 and its homologous genes, OsBRL1 and OsBRL3, in rice
  • D61~OsBRI1~OsBRKq1~HFR131, RPL1, RPL1, a gene involved in epigenetic processes regulates phenotypic plasticity in rice, Analysis of the putative rice brassinosteroid receptor OsBRI1, a key hormone signaling gene, indicated that RPL1 may be involved in the regulation of epigenomic modification of the gene
  • D61~OsBRI1~OsBRKq1~HFR131, OsBISERK1~OsSERK1~OsBAK1~TBP1, OsSERK1 regulates rice development but not immunity to Xanthomonas oryzae pv. oryzae or Magnaporthe oryzae, In yeast, OsSERK1 interacts with itself forming homodimers, and also interacts with the kinase domains of OsSERK2 and BRI1, respectively.
  • D61~OsBRI1~OsBRKq1~HFR131, OsARF19, The auxin response factor, OsARF19, controls rice leaf angles through positively regulating OsGH3-5 and OsBRI1., The auxin response factor, OsARF19, controls rice leaf angles through positively regulating OsGH3-5 and OsBRI1.
  • D61~OsBRI1~OsBRKq1~HFR131, OsARF19, The auxin response factor, OsARF19, controls rice leaf angles through positively regulating OsGH3-5 and OsBRI1., Chromatin immunoprecipitation (ChIP) and yeast one-hybrid assays demonstrate that OsARF19 binds to the promoter of OsGH3-5 and brassinosteroid insensitive 1 (OsBRI1) directing their expression
  • D61~OsBRI1~OsBRKq1~HFR131, OsDof12~OsCDF1, Overexpression of OsDof12 affects plant architecture in rice Oryza sativa L.., Of note, in WT plants the expression of OsDof12 was found up-regulated by BR treatment while in OsDof12 overexpression plants two positive BR signaling regulators, OsBRI1 and OsBZR1, were significantly down-regulated, indicating that OsDof12 may act as a negative BR regulator in rice
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK3, OsBRI1 activates BR signaling by preventing binding between the TPR and kinase domains of OsBSK3 via phosphorylation., OsBRI1 activates BR signaling by preventing binding between the TPR and kinase domains of OsBSK3 via phosphorylation.
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK3, OsBRI1 activates BR signaling by preventing binding between the TPR and kinase domains of OsBSK3 via phosphorylation., Genetic studies revealed that OsBSK3 is a positive regulator of BR signaling in rice, while in vivo and in vitro assays demonstrated that OsBRI1 interacts directly with and phosphorylates OsBSK3
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK3, OsBRI1 activates BR signaling by preventing binding between the TPR and kinase domains of OsBSK3 via phosphorylation., Phosphorylation of OsBSK3 by OsBRI1 disrupts the interaction between its TPR and kinase domains, thereby increasing the binding between OsBSK3’s kinase domain and BSU1
  • D61~OsBRI1~OsBRKq1~HFR131, LPA1, Loose Plant Architecture1 LPA1 determines lamina joint bending by suppressing auxin signalling that interacts with C-22-hydroxylated and 6-deoxo brassinosteroids in rice., Genetic and biochemical data indicate that LPA1 suppresses the auxin signalling that interacts with C-22-hydroxylated and 6-deoxo BRs, which regulates lamina inclination independently of OsBRI1
  • D61~OsBRI1~OsBRKq1~HFR131, LPA1, Loose Plant Architecture1 LPA1 determines lamina joint bending by suppressing auxin signalling that interacts with C-22-hydroxylated and 6-deoxo brassinosteroids in rice., No significant interaction between LPA1 and OsBRI1 was identified
  • D61~OsBRI1~OsBRKq1~HFR131, OsPRA2, A Small G Protein as a Novel Component of the Rice Brassinosteroid Signal Transduction., More importantly, OsPRA2 was found to co-localize with and directly bind to rice BR receptor BRASSINOSTEROID-INSENSITIVE 1 (OsBRI1) on the plasma membrane
  • D61~OsBRI1~OsBRKq1~HFR131, OsPRA2, A Small G Protein as a Novel Component of the Rice Brassinosteroid Signal Transduction., Together, these results revealed a possible working mechanism of OsPRA2 as a novel negative regulator on OsBRI1 and OsBZR1 in the BR signaling pathway in rice, and further extended the knowledge about the regulatory mechanism of rice BR signaling
  • D61~OsBRI1~OsBRKq1~HFR131, OsPRA2, OsPRA2 fine-tunes rice brassinosteroid receptor., Recently we have reported that a rice small G protein, OsPRA2, bound to the BR receptor OsBRI1 at the plasma membrane (PM) and inhibited its kinase activity and its interaction with the co-receptor OsBAK1, leading to a lower sensitivity to BR treatment and dephosphorylation of OsBZR1
  • D61~OsBRI1~OsBRKq1~HFR131, OsPRA2, OsPRA2 fine-tunes rice brassinosteroid receptor., In addition, we observed that, besides colocalizing at the PM, OsPRA2 was also colocalized with OsBRI1 in small granules near PM, suggesting that the function of OsPRA2 in vesicle traffic may contribute to the regulation of OsBRI1
  • D61~OsBRI1~OsBRKq1~HFR131, OsBISERK1~OsSERK1~OsBAK1~TBP1, Top Bending Panicle1 is involved in brassinosteroid signaling and regulates the plant architecture in rice, Furthermore, bimolecular fluorescence complementation and co-immunoprecipitation analysis demonstrated that a substitution at 61st amino acid (His61Leu) in the tbp1 mutant may result in a reduction of the interaction between TBP1 and OsBRI1 (BR receptor in rice)
  • D61~OsBRI1~OsBRKq1~HFR131, TUD1~DSG1~ELF1, Rice ERECT LEAF 1 acts in an alternative brassinosteroid signaling pathway independent of the receptor kinase OsBRI1., A double mutant obtained by crossing elf1-1 (a null mutant of ELF1) with d61-1 (a leaky mutant of OsBRI1) showed a more severe phenotype than did the elf1-1 single mutant, resembling that of a severe brassinosteroid-deficient mutant
  • D61~OsBRI1~OsBRKq1~HFR131, TUD1~DSG1~ELF1, Rice ERECT LEAF 1 acts in an alternative brassinosteroid signaling pathway independent of the receptor kinase OsBRI1., These results indicate that less than half of ELF1-regulated genes in rice seedlings are affected by OsBRI1, and suggest that ELF1 acts in a rice brassinosteroid signaling pathway different from that initiated by OsBRI1
  • D61~OsBRI1~OsBRKq1~HFR131, TUD1~DSG1~ELF1, An E3 ubiquitin ligase, ERECT LEAF1, functions in brassinosteroid signaling of rice., Similarities in the phenotypes of elf1 and d61 mutants (mutants of brassinosteroid receptor gene OsBRI1), and in the regulation of ELF1 and OsBRI1 expression, imply that ELF1 functions as a positive regulator of brassinosteroid signaling in rice
  • D61~OsBRI1~OsBRKq1~HFR131, OsARF11, DS1/OsEMF1 interacts with OsARF11 to control rice architecture by regulation of brassinosteroid signaling., DS1 interacts with OsARF11 to co-regulate OsBRI1 expression
  • D61~OsBRI1~OsBRKq1~HFR131, SERK2~OsSERK2, Regulation of Brassinosteroid Signaling and Salt Resistance by SERK2 and Potential Utilization for Crop Improvement in Rice, SERK2 is localized on plasma membrane and can interact with OsBRI1, the BR receptor, suggesting its conserved role as co-receptor in BR signaling
  • D61~OsBRI1~OsBRKq1~HFR131, SRS3~OsKINESIN-13A~BHS1, The kinesin-13 protein BR HYPERSENSITIVE 1 is a negative brassinosteroid signaling component regulating rice growth and development., Furthermore, we found that the BR-induced degradation of BHS1 was attenuated in Osbri1 and Osbak1 mutants, but not in Osbzr1 and Oslic mutants
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK2, OsBSK2, a putative brassinosteroid-signaling kinase, positively controls grain size in rice., OsBSK2 directly interacts with the BR receptor kinase OsBRI1, however, genetic experiments have demonstrated that OsBSK2 likely regulates grain size independently of the BR signaling pathway
  • D61~OsBRI1~OsBRKq1~HFR131, OsSLA1, OsSLA1 functions in leaf angle regulation by enhancing the interaction between OsBRI1 and OsBAK1 in rice., Knockout of OsSLA1 in the context of d61 caused exacerbation of the mutant phenotype
  • D61~OsBRI1~OsBRKq1~HFR131, OsSLA1, OsSLA1 functions in leaf angle regulation by enhancing the interaction between OsBRI1 and OsBAK1 in rice., OsSLA1 functions in leaf angle regulation by enhancing the interaction between OsBRI1 and OsBAK1 in rice.
  • D61~OsBRI1~OsBRKq1~HFR131, OsSLA1, OsSLA1 functions in leaf angle regulation by enhancing the interaction between OsBRI1 and OsBAK1 in rice., Further study showed that OsSLA1 interacts with OsBRI1 and OsBAK1 via its intracellular domain and promotes the interaction between OsBRI1 and OsBAK1
  • D61~OsBRI1~OsBRKq1~HFR131, OsSLA1, OsSLA1 functions in leaf angle regulation by enhancing the interaction between OsBRI1 and OsBAK1 in rice., In addition, phosphorylation experiments revealed that OsSLA1 does not possess kinase activity, but that it can be phosphorylated by OsBRI1 in vitro
  • D61~OsBRI1~OsBRKq1~HFR131, OsSLA1, OsSLA1 functions in leaf angle regulation by enhancing the interaction between OsBRI1 and OsBAK1 in rice., These results demonstrate that OsSLA1 regulates leaf angle formation via positive regulation of BR signaling by enhancing the interaction of OsBRI1 with OsBAK1
  • D61~OsBRI1~OsBRKq1~HFR131, OsWAK11, The receptor kinase OsWAK11 monitors cell wall pectin changes to fine-tune brassinosteroid signaling and regulate cell elongation in rice., OsWAK11 directly binds and phosphorylates the BR receptor OsBRI1 at residue Thr752, within a motif conserved across most monocot graminaceous crops, thus hindering OsBRI1 interaction with its co-receptor OsSERK1/OsBAK1 and inhibiting BR signaling
  • D61~OsBRI1~OsBRKq1~HFR131, DLT~OsGRAS-32~D62~GS6~SMOS2, Rice DWARF AND LOW-TILLERING and the homeodomain protein OSH15 interact to regulate internode elongation via orchestrating brassinosteroid signaling and metabolism., OSH15 targets and promotes the expression of the BR receptor gene BR INSENSITIVE1 (OsBRI1), and DLT facilitates this regulation in a dosage-dependent manner
  • D61~OsBRI1~OsBRKq1~HFR131, GSK2~OsGSK2~OsSK22, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., We found that OsBSK1-1 physically interacts with the BR receptor BRASSINOSTEROID INSENSITIVE1 (OsBRI1), and GLYCOGEN SYNTHASE KINASE2 (OsGSK2), a downstream component crucial for BR signalling
  • D61~OsBRI1~OsBRKq1~HFR131, GSK2~OsGSK2~OsSK22, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., We further demonstrated that OsBSK1-1 genetically acts downstream of OsBRI1, but upstream of OsGSK2
  • D61~OsBRI1~OsBRKq1~HFR131, GSK2~OsGSK2~OsSK22, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., Together, our results suggest that OsBSK1-1 may serve as a scaffold protein directly bridging OsBRI1 and OsGSK2 to positively regulate BR signalling, thus affecting plant architecture and grain size in rice
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK1-1, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., We found that OsBSK1-1 physically interacts with the BR receptor BRASSINOSTEROID INSENSITIVE1 (OsBRI1), and GLYCOGEN SYNTHASE KINASE2 (OsGSK2), a downstream component crucial for BR signalling
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK1-1, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., Moreover, we showed that OsBSK1-1 can be phosphorylated by OsBRI1 and can inhibit OsGSK2-mediated phosphorylation of BRASSINOSTEROID RESISTANT1 (OsBZR1)
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK1-1, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., We further demonstrated that OsBSK1-1 genetically acts downstream of OsBRI1, but upstream of OsGSK2
  • D61~OsBRI1~OsBRKq1~HFR131, OsBSK1-1, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., Together, our results suggest that OsBSK1-1 may serve as a scaffold protein directly bridging OsBRI1 and OsGSK2 to positively regulate BR signalling, thus affecting plant architecture and grain size in rice
  • D61~OsBRI1~OsBRKq1~HFR131, OsBZR1~BZR1, BRASSINOSTEROID-SIGNALING KINASE1-1, a positive regulator of brassinosteroid signalling, modulates plant architecture and grain size in rice., Moreover, we showed that OsBSK1-1 can be phosphorylated by OsBRI1 and can inhibit OsGSK2-mediated phosphorylation of BRASSINOSTEROID RESISTANT1 (OsBZR1)
  • D61~OsBRI1~OsBRKq1~HFR131, OsARF17, The identification and characterization of a plant height and grain length related gene hfr131 in rice., By combining yeast one-hybrid assays, chromatin immunoprecipitation-quantitative PCR and gene expression quantification, we demonstrated that OsARF17, an auxin response factor, could bind to the promoter region of HFR131 and positively regulated HFR131 expression, thereby regulating the plant height and grain length, and influencing brassinosteroid sensitivity

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