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Influence of nonuniform magnetic fields on orientation of plant seedlings in microgravity conditions.

Advances in space research : the official journal of the Committee on Space Research (COSPAR) · 2001 · Mixed · Low evidence

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MixedLow evidencePaper 3918

Flax seedlings grown for 3–4 days in a nonuniform magnetic field in microgravity were reported to orient consistently with curvature expected from displacement of statoliths along the field gradient by magnetic forces (93% oriented in-field). Control seedling…

Study snapshot

PublicationAdvances in space research : the official journal of the Committee on Space Research (COSPAR) · 2001
Study typeother
Reported directionMixed
Evidence ratingLow

Abstract

Experiments on the spatial behavior of the flax (Linum usitatissimum, L.) seedlings in a nonuniform magnetic field were conducted on the orbital space stations "Salut" and "Mir". This field can displace sensory organelles (statoliths) inside receptor cells and such displacement should cause a physiological reaction of the plant-tropistic curvature. Experiments were conducted in the custom-built "Magnetogravistat" facility, where seeds were germinated and grown for 3-4 days in a magnetic field with the dynamic factor grad (H2/2) approximately equal to 10(7) Oe2/cm, then fixed on orbit and returned to Earth for analysis. It was found, that 93% of the seedlings were oriented in the field consistently with curvature in response to displacement of statoliths along the field gradient by ponderomotive magnetic forces, while control seedlings grew in the direction of the initial orientation of the seed. This suggests, that gravity receptors of plants recognized magnetic forces on statoliths as gravity, and that gravity stimulus can be substituted for plants by a force of a different physical nature.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother
Effect directionmixed
PopulationFlax (Linum usitatissimum) seedlings grown in microgravity on orbital space stations (Salut and Mir)
Sample sizeNot supplied
Exposure3-4 days
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Flax seedlings grown for 3–4 days in a nonuniform magnetic field in microgravity were reported to orient consistently with curvature expected from displacement of statoliths along the field gradient by magnetic forces (93% oriented in-field). Control seedlings reportedly grew in the direction of the initial seed orientation.

Outcomes measured

  • Seedling orientation
  • Plant-tropistic curvature (response consistent with statolith displacement)

Limitations

  • Sample size not reported in abstract
  • Magnetic field characterized by gradient factor (grad(H^2/2)) but no frequency information provided
  • Details of control conditions and randomization/blinding not described in abstract
  • Outcome assessment methods and statistical analysis not described in abstract
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "other",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "3-4 days"
  },
  "population": "Flax (Linum usitatissimum) seedlings grown in microgravity on orbital space stations (Salut and Mir)",
  "sample_size": null,
  "outcomes": [
    "Seedling orientation",
    "Plant-tropistic curvature (response consistent with statolith displacement)"
  ],
  "main_findings": "Flax seedlings grown for 3–4 days in a nonuniform magnetic field in microgravity were reported to orient consistently with curvature expected from displacement of statoliths along the field gradient by magnetic forces (93% oriented in-field). Control seedlings reportedly grew in the direction of the initial seed orientation.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract",
    "Magnetic field characterized by gradient factor (grad(H^2/2)) but no frequency information provided",
    "Details of control conditions and randomization/blinding not described in abstract",
    "Outcome assessment methods and statistical analysis not described in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "nonuniform magnetic field",
    "microgravity",
    "plant seedlings",
    "flax",
    "Linum usitatissimum",
    "statoliths",
    "tropism",
    "orientation",
    "space station",
    "Magnetogravistat"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1016/s0273-1177(01)00372-6
PubMed: 11803966

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