ArticlePlant physiology2001
Nodal endoplasmic reticulum, a specialized form of endoplasmic reticulum found in gravity-sensing root tip columella cells.
Article in Plant physiology, 2001. 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, 72 citations in OpenAlex.
- Live Visualization of Endoplasmic Reticulum Redox Potential in Zebrafish Embryos Reveals Region-Specific Heterogeneity.Biomedicines · 2026Article
- Modifications in Ultrastructural Characteristics and Redox Status of Plants under Environmental Stress: A Review.Plants (Basel, Switzerland) · 2023Review
- Blocking Rice Shoot Gravitropism by Altering One Amino Acid in LAZY1.International journal of molecular sciences · 2022Article
- Plant Gravitropism: From Mechanistic Insights into Plant Function on Earth to Plants Colonizing Other Worlds.Methods in molecular biology (Clifton, N.J.) · 2022Review
- A Core Regulatory Pathway Controlling Rice Tiller Angle Mediated by theThe Plant cell · 2018Article
- Mechanotransduction as an Adaptation to Gravity.Frontiers in pediatrics · 2016Review
- A Bird's-Eye View of Molecular Changes in Plant Gravitropism Using Omics Techniques.Frontiers in plant science · 2015Review
- Article
- Multiple roles for membrane-associated protein trafficking and signaling in gravitropism.Frontiers in plant science · 2012Article
- A proteomic approach to analyzing responses of Arabidopsis thaliana root cells to different gravitational conditions using an agravitropic mutant, pin2 and its wild type.Proteome science · 2011Article
- Shrinkage and fragmentation of the trans-Golgi network in non-meristematic plant cells.Plant signaling & behavior · 2011Article
- Gravity research on plants: use of single-cell experimental models.Frontiers in plant science · 2011Article
- Statolith sedimentation kinetics and force transduction to the cortical endoplasmic reticulum in gravity-sensing Arabidopsis columella cells.The Plant cell · 2009Article
- Comparative study of cellular structures implicated in gravisensing in statocytes of primary and lateral roots of Vigna angularis.Protoplasma · 2006Article
- Actin turnover-mediated gravity response in maize root apices: gravitropism of decapped roots implicates gravisensing outside of the root cap.Plant signaling & behavior · 2006Article
- The onset of gravisensitivity in the embryonic root of flax.Plant physiology · 2006Article
- How to activate a plant gravireceptor. Early mechanisms of gravity sensing studied in characean rhizoids during parabolic flights.Plant physiology · 2005Article
- Enhanced gravitropism of roots with a disrupted cap actin cytoskeleton.Plant physiology · 2003Article
- SGR2, a phospholipase-like protein, and ZIG/SGR4, a SNARE, are involved in the shoot gravitropism of Arabidopsis.The Plant cell · 2002Article
- Arabidopsis thaliana: A Model for the Study of Root and Shoot Gravitropism.The arabidopsis book · 2002Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The endoplasmic reticulum (ER) of columella root cap cells has been postulated to play a role in gravity sensing. We have re-examined the ultrastructure of columella cells in tobacco (Nicotiana tabacum) root tips preserved by high-pressure freezing/freeze-substitution techniques to gain more precise information about the organization of the ER in such cells. The most notable findings are: the identification of a specialized form of ER, termed "nodal ER," which is found exclusively in columella cells; the demonstration that the bulk of the ER is organized in the form of a tubular network that is confined to a peripheral layer under the plasma membrane; and the discovery that this ER-rich peripheral region excludes Golgi stacks, vacuoles, and amyloplasts but not mitochondria. Nodal ER domains consist of an approximately 100-nm-diameter central rod composed of oblong subunits to which usually seven sheets of rough ER are attached along their margins. These domains form patches at the interface between the peripheral ER network and the ER-free central region of the cells, and they occupy defined positions within central and flanking columella cells. Over one-half of the nodal ER domains are located along the outer tangential walls of the flanking cells. Cytochalasin D and latrunculin A cause an increase in size and a decrease in numbers of nodal ER domains. We postulate that the nodal ER membranes locally modulate the gravisensing signals produced by the sedimenting amyloplasts, and that the confinement of all ER membranes to the cell periphery serves to enhance the sedimentability of the amyloplasts in the central region of columella cells.
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