ArticleThe Plant cell2011
An Arabidopsis E3 ligase, SHOOT GRAVITROPISM9, modulates the interaction between statoliths and F-actin in gravity sensing.
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 47 papers.
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Who cites it
47 citing papers in PubMed, 99 citations in OpenAlex.
- Article
- Regulation of shoot gravitropism and branching angle by the GRV2-SAC1 axis in Arabidopsis.The Plant journal : for cell and molecular biology · 2026Article
- Deciphering the Protein Phosphorylation Dynamics Triggered by Seconds of Force Stimulation.Molecular & cellular proteomics : MCP · 2026Article
- The transcription factor ANAC017 links mitochondrial retrograde signaling with the ubiquitin-proteasome system to control mitochondrial function in Arabidopsis.Plant communications · 2026Article
- Actin depolymerization by Latrunculin B can either suppress or promote root gravitropism, depending on the developmental stages in Arabidopsis.Plant signaling & behavior · 2025Article
- Article
- Flower movement induced by weather-dependent tropism satisfies attraction and protection.Nature communications · 2025Article
- How it all begins: molecular players of the early graviresponse in the non-elongating part of flax stem.Plant molecular biology · 2025Article
- Cellular and physiological functions of SGR family in gravitropic response in higher plants.Journal of advanced research · 2025Review
- Phenotypic adaptation and genomic variation ofFrontiers in plant science · 2025Article
- LAZY4 acts additively with the starch-statolith-dependent gravity-sensing pathway to regulate shoot gravitropism and tiller angle in rice.Plant communications · 2024Article
- Reply: Does the polyubiquitination pathway operate inside intact chloroplasts to remove proteins?The Plant cell · 2024Article
- Single-cell network analysis reveals gene expression programs for Arabidopsis root development and metabolism.Plant communications · 2024Article
- Fine-mapping of a QTL and identification of candidate genes associated with the lateral branch angle of peanuts (Frontiers in plant science · 2024Article
- Gravity sensing and responses in the coordination of the shoot gravitropic setpoint angle.The New phytologist · 2022Review
- Plants in Microgravity: Molecular and Technological Perspectives.International journal of molecular sciences · 2022Review
- Bulk RNA-Seq Analysis Reveals Differentially Expressed Genes Associated with Lateral Branch Angle in Peanut.Genes · 2022Article
- Characterization of a Novel Creeping Tartary Buckwheat (Frontiers in plant science · 2022Article
- Plant Gravitropism: From Mechanistic Insights into Plant Function on Earth to Plants Colonizing Other Worlds.Methods in molecular biology (Clifton, N.J.) · 2022Review
- Genome-wide association study and transcriptome analysis reveal key genes controlling fruit branch angle in cotton.Frontiers in plant science · 2022Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Higher plants use the sedimentation of amyloplasts in statocytes as statolith to sense the direction of gravity during gravitropism. In Arabidopsis thaliana inflorescence stem statocyte, amyloplasts are in complex movement; some show jumping-like saltatory movement and some tend to sediment toward the gravity direction. Here, we report that a RING-type E3 ligase SHOOT GRAVITROPISM9 (SGR9) localized to amyloplasts modulates amyloplast dynamics. In the sgr9 mutant, which exhibits reduced gravitropism, amyloplasts did not sediment but exhibited increased saltatory movement. Amyloplasts sometimes formed a cluster that is abnormally entangled with actin filaments (AFs) in sgr9. By contrast, in the fiz1 mutant, an ACT8 semidominant mutant that induces fragmentation of AFs, amyloplasts, lost saltatory movement and sedimented with nearly statically. Both treatment with Latrunculin B, an inhibitor of AF polymerization, and the fiz1 mutation rescued the gravitropic defect of sgr9. In addition, fiz1 decreased saltatory movement and induced amyloplast sedimentation even in sgr9. Our results suggest that amyloplasts are in equilibrium between sedimentation and saltatory movement in wild-type endodermal cells. Furthermore, this equilibrium is the result of the interaction between amyloplasts and AFs modulated by the SGR9. SGR9 may promote detachment of amyloplasts from AFs, allowing the amyloplasts to sediment in the AFs-dependent equilibrium of amyloplast dynamics.
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