ArticlePlant physiology2022
RLB (RICE LATERAL BRANCH) recruits PRC2-mediated H3K27 tri-methylation on OsCKX4 to regulate lateral branching.
Article in Plant physiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed, 56 citations in OpenAlex.
- Phytohormones and Shoot Branching: A Mini-Review of Molecular Regulatory Networks and Mechanisms.Plants (Basel, Switzerland) · 2026Review
- WUSCHEL Transcription Factor: From Stem Cell Maintenance to Crop Improvement.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Review
- Functional characterization of transporter genes in rice node at single-cell resolution through multi-omics technologies.Genome biology · 2026Article
- Dynamic monitoring of rice plant height during the early growth stage using UAV-LiDAR and GWAS analysis of growth rate.Frontiers in plant science · 2026Article
- From rhizome diffusion to programmable architecture: a systems framework for controllable spatial expansion in bamboo and other clonal plants.Frontiers in plant science · 2026Review
- Harnessing brassinosteroid signaling in rice: from molecular pathways to environmentally adaptive breeding.Frontiers in plant science · 2026Review
- Article
- Cytokinin and reproductive shoot architecture: bigger and better?Biochemical Society transactions · 2024Review
- Blocking of amino acid transporter OsAAP7 promoted tillering and yield by determining basic and neutral amino acids accumulation in rice.BMC plant biology · 2024Article
- Temperature Effect on Rhizome Development in Perennial rice.Rice (New York, N.Y.) · 2024Article
- GW9 determines grain size and floral organ identity in rice.Plant biotechnology journal · 2024Article
- Type I MADS-box transcription factor TaMADS-GS regulates grain size by stabilizing cytokinin signalling during endosperm cellularization in wheat.Plant biotechnology journal · 2024Article
- The cytokinin receptor OHK4/OsHK4 regulates inflorescence architecture in rice via an IDEAL PLANT ARCHITECTURE1/WEALTHY FARMER'S PANICLE-mediated positive feedback circuit.The Plant cell · 2023Article
- FRIZZLE PANICLE (FZP) regulates rice spikelets development through modulating cytokinin metabolism.BMC plant biology · 2023Article
- Optimization of rice panicle architecture by specifically suppressing ligand-receptor pairs.Nature communications · 2023Article
- Genetic basis controlling rice plant architecture and its modification for breeding.Breeding science · 2023Article
- Cytokinins regulate rice lamina joint development and leaf angle.Plant physiology · 2023Article
- The RAC/ROP GTPase activator OsRopGEF10 functions in crown root development by regulating cytokinin signaling in rice.The Plant cell · 2023Article
- Potentially Useful Dwarfing or Semi-dwarfing Genes in Rice Breeding in Addition to the sd1 Gene.Rice (New York, N.Y.) · 2022Review
- The Harbinger transposon-derived gene PANDA epigenetically coordinates panicle number and grain size in rice.Plant biotechnology journal · 2022Article
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Authors and funding
17 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Lateral branches such as shoot and panicle are determining factors and target traits for rice (Oryza sativa L.) yield improvement. Cytokinin promotes rice lateral branching; however, the mechanism underlying the fine-tuning of cytokinin homeostasis in rice branching remains largely unknown. Here, we report the map-based cloning of RICE LATERAL BRANCH (RLB) encoding a nuclear-localized, KNOX-type homeobox protein from a rice cytokinin-deficient mutant showing more tillers, sparser panicles, defected floret morphology as well as attenuated shoot regeneration from callus. RLB directly binds to the promoter and represses the transcription of OsCKX4, a cytokinin oxidase gene with high abundance in panicle branch meristem. OsCKX4 over-expression lines phenocopied rlb, which showed upregulated OsCKX4 levels. Meanwhile, RLB physically binds to Polycomb repressive complex 2 (PRC2) components OsEMF2b and co-localized with H3K27me3, a suppressing histone modification mediated by PRC2, in the OsCKX4 promoter. We proposed that RLB recruits PRC2 to the OsCKX4 promoter to epigenetically repress its transcription, which suppresses the catabolism of cytokinin, thereby promoting rice lateral branching. Moreover, antisense inhibition of OsCKX4 under the LOG promoter successfully increased panicle size and spikelet number per plant without affecting other major agronomic traits. This study provides insight into cytokinin homeostasis, lateral branching in plants, and also promising target genes for rice genetic improvement.
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