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Related Experiment Videos

Cellular changes in wheat seedlings during orbital flight.

B F Edwards1, S W Gray

  • 1Department of Anatomy, Emory University, Atlanta, Georgia, USA.

Life Sciences and Space Research
|January 1, 1971
PubMed
Summary
This summary is machine-generated.

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Wheat seedlings grown in weightlessness showed significant cellular differences compared to ground controls. Orbital flight altered cell division, elongation, and nuclear volume in ways not fully replicated by simulated microgravity.

Area of Science:

  • Plant biology
  • Space biology
  • Cellular biology

Background:

  • Spaceflight affects plant growth and development.
  • Understanding cellular responses to microgravity is crucial for space exploration.

Purpose of the Study:

  • To investigate cellular changes in wheat seedlings exposed to weightlessness.
  • To compare microgravity effects with ground-based simulations.

Main Methods:

  • Wheat seedlings were grown aboard NASA Biosatellite 2 in orbit.
  • Ground controls included static (1g) and clinostat-simulated microgravity conditions.
  • Cellular parameters such as mitotic count, cell length, and nuclear volume were analyzed.

Main Results:

  • Orbital flight reduced mitotic counts in roots, particularly in early prophase.
Keywords:
NASA Experiment Number P-1020

Related Experiment Videos

  • Root cells in flight seedlings were longer, compensating for reduced cell division.
  • Interphase nuclear volume increased in all organs of flight seedlings, unlike clinostat controls.
  • Simulated launch vibrations had varied effects, and clinostat simulation did not fully replicate flight conditions.

    • Conclusions:

    • Orbital flight induces distinct cellular alterations in wheat seedlings.
    • Cellular responses to microgravity are complex and not entirely mimicked by ground-based simulations.
    • Weightlessness significantly impacts cell division, elongation, and nuclear morphology in plants.