ArticleThe Plant cell2011
BENT UPPERMOST INTERNODE1 encodes the class II formin FH5 crucial for actin organization and rice development.
Article in The Plant cell, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.
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57 citing papers in PubMed, 97 citations in OpenAlex.
- BUI1 coordinates actin cytoskeleton remodeling and ROS homeostasis to confer broad-spectrum disease resistance in rice.Stress biology · 2026Article
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- OsBRK1-mediated phosphorylation of OsPFN2 regulates meiotic spindle-actin assembly and rice fertility.Plant communications · 2025Article
- RMD and Its Suppressor MAPK6 Control Root Circumnutation and Obstacle Avoidance via BR Signaling.International journal of molecular sciences · 2024Article
- Research Progress on Mechanical Strength of Rice Stalks.Plants (Basel, Switzerland) · 2024Review
- Formin protein DRT1 affects gross morphology and chloroplast relocation in rice.Plant physiology · 2023Article
- ETHYLENE RESPONSE FACTOR 34 promotes secondary cell wall thickening and strength of rice peduncles.Plant physiology · 2022Article
- Rice SIAH E3 Ligases Interact with RMD Formin and Affect Plant Morphology.Rice (New York, N.Y.) · 2022Article
- Cell biology of primary cell wall synthesis in plants.The Plant cell · 2022Review
- Discovery and Validation of Grain Shape Loci in U.S. Rice Germplasm Through Haplotype Characterization.Frontiers in genetics · 2022Article
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- Analysis of formin functions during cytokinesis using specific inhibitor SMIFH2.Plant physiology · 2021Article
- The quest for the central players governing pollen tube growth and guidance.Plant physiology · 2021Review
- TheFrontiers in plant science · 2021Article
- An Update on the Role of the Actin Cytoskeleton in Plasmodesmata: A Focus on Formins.Frontiers in plant science · 2021Review
- Systematic Analysis of Cold Stress Response and Diurnal Rhythm Using Transcriptome Data in Rice Reveals the Molecular Networks Related to Various Biological Processes.International journal of molecular sciences · 2020Article
- An Intrinsically Disordered Protein Interacts with the Cytoskeleton for Adaptive Root Growth under Stress.Plant physiology · 2020Article
- Auxin-induced actin cytoskeleton rearrangements require AUX1.The New phytologist · 2020Article
- Arabidopsis Class II Formins AtFH13 and AtFH14 Can Form Heterodimers but Exhibit Distinct Patterns of Cellular Localization.International journal of molecular sciences · 2020Article
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12 authors at 3 institutions in 1 country.
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Abstract
The actin cytoskeleton is an important regulator of cell expansion and morphogenesis in plants. However, the molecular mechanisms linking the actin cytoskeleton to these processes remain largely unknown. Here, we report the functional analysis of rice (Oryza sativa) FH5/BENT UPPERMOST INTERNODE1 (BUI1), which encodes a formin-type actin nucleation factor and affects cell expansion and plant morphogenesis in rice. The bui1 mutant displayed pleiotropic phenotypes, including bent uppermost internode, dwarfism, wavy panicle rachis, and enhanced gravitropic response. Cytological observation indicated that the growth defects of bui1 were caused mainly by inhibition of cell expansion. Map-based cloning revealed that BUI1 encodes the class II formin FH5. FH5 contains a phosphatase tensin-like domain at its amino terminus and two highly conserved formin-homology domains, FH1 and FH2. In vitro biochemical analyses indicated that FH5 is capable of nucleating actin assembly from free or profilin-bound monomeric actin. FH5 also interacts with the barbed end of actin filaments and prevents the addition and loss of actin subunits from the same end. Interestingly, the FH2 domain of FH5 could bundle actin filaments directly and stabilize actin filaments in vitro. Consistent with these in vitro biochemical activities of FH5/BUI1, the amount of filamentous actin decreased, and the longitudinal actin cables almost disappeared in bui1 cells. The FH2 or FH1FH2 domains of FH5 could also bind to and bundle microtubules in vitro. Thus, our study identified a rice formin protein that regulates de novo actin nucleation and spatial organization of the actin filaments, which are important for proper cell expansion and rice morphogenesis.
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