ArticleProceedings of the National Academy of Sciences of the United States of America2013
Unifying model of shoot gravitropism reveals proprioception as a central feature of posture control in plants.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.
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69 citing papers in PubMed, 199 citations in OpenAlex.
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- Parametrization of biological assumptions to simulate growth of tree branching architectures.Tree physiology · 2024Article
- On the mechanical origins of waving, coiling and skewing inProceedings of the National Academy of Sciences of the United States of America · 2024Article
- A quantitative model for spatio-temporal dynamics of root gravitropism.Journal of experimental botany · 2024Article
- Quantitative analysis of the root posture ofQuantitative plant biology · 2024Article
- Plants sum and subtract stimuli over different timescales.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- A 2D model to study how secondary growth affects the self-supporting behaviour of climbing plants.PLoS computational biology · 2023Article
- Multiple light signaling pathways control solar tracking in sunflowers.PLoS biology · 2023Article
- Shoot gravitropism and organ straightening cooperate to arrive at a mechanically favorable shape in Arabidopsis.Scientific reports · 2023Article
- Gravity sensing and responses in the coordination of the shoot gravitropic setpoint angle.The New phytologist · 2022Review
- Analysis of the Small Auxin-Up RNA (SAUR) Genes Regulating Root Growth Angle (RGA) in Apple.Genes · 2022Article
- A mechano-sensing mechanism for waving in plant roots.Scientific reports · 2022Article
- Mechanosensing, from forces to structures.Frontiers in plant science · 2022Review
- Embodiment in distributed information processing: "Solid" plants versus "liquid" ant colonies.Quantitative plant biology · 2022Review
9 more citing papers are in PubMed but not listed here.
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Authors and funding
4 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Gravitropism, the slow reorientation of plant growth in response to gravity, is a key determinant of the form and posture of land plants. Shoot gravitropism is triggered when statocysts sense the local angle of the growing organ relative to the gravitational field. Lateral transport of the hormone auxin to the lower side is then enhanced, resulting in differential gene expression and cell elongation causing the organ to bend. However, little is known about the dynamics, regulation, and diversity of the entire bending and straightening process. Here, we modeled the bending and straightening of a rod-like organ and compared it with the gravitropism kinematics of different organs from 11 angiosperms. We show that gravitropic straightening shares common traits across species, organs, and orders of magnitude. The minimal dynamic model accounting for these traits is not the widely cited gravisensing law but one that also takes into account the sensing of local curvature, what we describe here as a graviproprioceptive law. In our model, the entire dynamics of the bending/straightening response is described by a single dimensionless "bending number" B that reflects the ratio between graviceptive and proprioceptive sensitivities. The parameter B defines both the final shape of the organ at equilibrium and the timing of curving and straightening. B can be estimated from simple experiments, and the model can then explain most of the diversity observed in experiments. Proprioceptive sensing is thus as important as gravisensing in gravitropic control, and the B ratio can be measured as phenotype in genetic studies.
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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.