ArticlePlant physiology2009
A role for the TOC complex in Arabidopsis root gravitropism.
Article in Plant physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.
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Who cites it
38 citing papers in PubMed, 89 citations in OpenAlex.
- Assembly of two functionally-distinct protein import complexes in the outer membrane of plant chloroplasts.Nature communications · 2026Article
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- IGT/LAZY genes are differentially influenced by light and required for light-induced change to organ angle.BMC biology · 2024Article
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- Low-Speed Clinorotation ofInternational journal of molecular sciences · 2023Article
- Gravity sensing and responses in the coordination of the shoot gravitropic setpoint angle.The New phytologist · 2022Review
- Plant Gravitropism: From Mechanistic Insights into Plant Function on Earth to Plants Colonizing Other Worlds.Methods in molecular biology (Clifton, N.J.) · 2022Review
- Chloroplast import of an intermembrane space protein is facilitated by translocon components Toc75 and Tic236.Plant direct · 2021Article
- Auxin and Root Gravitropism: Addressing Basic Cellular Processes by Exploiting a Defined Growth Response.International journal of molecular sciences · 2021Review
- Gravity Signaling in Flowering Plant Roots.Plants (Basel, Switzerland) · 2020Review
- Root Tropisms: Investigations on Earth and in Space to Unravel Plant Growth Direction.Frontiers in plant science · 2019Review
- Developmental regulation of protein import into plastids.Photosynthesis research · 2018Review
- ARG1 Functions in the Physiological Adaptation of Undifferentiated Plant Cells to Spaceflight.Astrobiology · 2017Article
- Suppressors of the Chloroplast Protein Import MutantThe Plant cell · 2017Article
- Striking the Right Chord: Signaling Enigma during Root Gravitropism.Frontiers in plant science · 2017Review
- Gravireceptors in eukaryotes-a comparison of case studies on the cellular level.NPJ microgravity · 2017Article
- Review
- Article
- Morphometric analyses of petioles of seedlings grown in a spaceflight experiment.Journal of plant research · 2015Article
- New insights into root gravitropic signalling.Journal of experimental botany · 2015Review
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Arabidopsis (Arabidopsis thaliana) roots perceive gravity and reorient their growth accordingly. Starch-dense amyloplasts within the columella cells of the root cap are important for gravitropism, and starchless mutants such as pgm1 display an attenuated response to gravistimulation. The altered response to gravity1 (arg1) mutant is known to be involved with the early phases of gravity signal transduction. arg1 responds slowly to gravistimulation and is in a genetically distinct pathway from pgm1, as pgm1 mutants enhance the gravitropic defect of arg1. arg1 seeds were mutagenized with ethylmethane sulfonate to identify new mutants that enhance the gravitropic defect of arg1. Two modifier of arg1 mutants (mar1 and mar2) grow in random directions only when arg1 is present, do not affect phototropism, and respond like the wild type to application of phytohormones. Both have mutations affecting different components of the Translocon of Outer Membrane of Chloroplasts (TOC) complex. mar1 possesses a mutation in the TOC75-III gene; mar2 possesses a mutation in the TOC132 gene. Overexpression of TOC132 rescues the random growth phenotype of mar2 arg1 roots. Root cap amyloplasts in mar2 arg1 appear ultrastructurally normal. They saltate like the wild type and sediment at wild-type rates upon gravistimulation. These data point to a role for the plastidic TOC complex in gravity signal transduction within the statocytes.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.