Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Circumnutations without gravity: a two-oscillator model.

A Johnsson1, C Jensen, W Engelmann

  • 1Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway.

Journal of Gravitational Physiology : a Journal of the International Society for Gravitational Physiology
|September 7, 2001
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Alterations of Fat and Ketone Body Metabolism in ALS and SMA-A Prospective Observational Study.

European journal of neurology·2025
Same author

A comprehensive study of prescribing, administering and drug handling medication errors in ten wards of a university hospital after implementation of electronic prescribing, clinical pharmacists or medication reconciliation.

Die Pharmazie·2024
Same author

Electronic Integrated Management of Childhood Illness (eIMCI): a randomized controlled trial to evaluate an electronic clinical decision-making support system for management of sick children in primary health care facilities in South Africa.

BMC health services research·2024
Same author

Patterns of disease on admission to children's wards and changes during a COVID-19 outbreak in KwaZulu-Natal Province, South Africa.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2022
Same author

Dosimetric and Clinical Predictors for Acute and Late Gastrointestinal Toxicity Following Chemoradiotherapy of Locally Advanced Anal Cancer.

Clinical oncology (Royal College of Radiologists (Great Britain))·2021
Same author

Considerations for understanding protein measurements: Identification of formation, degradation and more pathological relevant epitopes.

Clinical biochemistry·2021
Same journal

Hypergravity effects on pregnancy and parturition.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2013
Same journal

Characteristics of the parallel-plate flow chamber for mechanical stimulation of bone cells under microgravity.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2009
Same journal

From the first dog to the last monkey in space.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2008
Same journal

Columbus, the European Physiology Modules Facility and CADMOS.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2008
Same journal

Abdominal and fetal echography tele-operated in several medical centres sites, from an expert center, using a robotic arm & telephone or satellite link.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2008
Same journal

WISE-2005: developing a non-invasive method to monitor cardiovascular deconditioning.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2008
See all related articles

Plant organ movements called circumnutations are complex, involving internal and external factors. Gravity influences these helical movements, but is not essential for their occurrence, as shown in space experiments.

Area of Science:

  • Plant biology
  • Biomechanics
  • Developmental biology

Background:

  • Circumnutations are helical growth movements observed in various plant organs.
  • These movements possess both endogenous and exogenously influenced components.
  • Circumnutations persist in microgravity, indicating gravity is not essential for their initiation.

Purpose of the Study:

  • To investigate the role of gravity in modifying circumnutation period and amplitude.
  • To develop and analyze a minimal two-oscillator model for simulating plant circumnutations.
  • To compare simulation results with experimental data from Arabidopsis hypocotyl movements.

Main Methods:

  • Theoretical modeling of coupled oscillatory units.
  • Simulation of hypocotyl movements using a two-oscillator model.

Related Experiment Videos

  • Comparison of simulated movements with experimental data.

    • Main Results:

    • A two-oscillator model successfully simulated plant hypocotyl movements.
    • The model incorporates both endogenous and gravity-modifying factors.
    • Simulations showed good agreement with experimental observations of Arabidopsis hypocotyls.

    Conclusions:

    • Gravity plays a significant modifying role in the dynamics of circumnutations.
    • Minimal two-oscillator models can effectively capture the complexity of circumnutation movements.
    • This modeling approach provides insights into the mechanisms underlying plant organ movements.