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Related Experiment Videos

Gravimorphogenesis in agarics.

D Moore1, B Hock, J P Greening

  • 1School of Biological Sciences, The University of Manchester, UK.

Mycological Research
|March 1, 1996
PubMed
Summary
This summary is machine-generated.

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Gravimorphogenesis, the study of how fungi like Coprinus cinereus and Flammulina velutipes change shape in response to gravity, reveals distinct sensing and response mechanisms. This research confirms gravity

Area of Science:

  • Plant Sciences
  • Mycology
  • Gravitational Biology

Background:

  • Gravitropism, or gravimorphogenesis, describes shape changes in fungal fruit bodies due to gravity.
  • Understanding gravimorphogenesis offers insights into fundamental morphogenetic processes.
  • Two agaric species, Coprinus cinereus and Flammulina velutipes, exhibit differential responses to gravity.

Purpose of the Study:

  • To experimentally investigate gravimorphogenesis in Coprinus cinereus and Flammulina velutipes.
  • To elucidate the mechanisms of gravity perception and response in these fungi.
  • To compare the adaptations of C. cinereus and F. velutipes to gravitational stimuli.

Main Methods:

  • Utilized advanced technologies including video analysis, electron microscopy, and computer-aided image analysis.

Related Experiment Videos

  • Conducted experiments in microgravity conditions aboard Spacelab D-2.
  • Employed clinostats to simulate altered gravity vectors and metabolic inhibitors to probe signaling pathways.

    • Main Results:

    • C. cinereus exhibits rapid gravitropism (within 3 hours), while F. velutipes requires 12 hours.
    • Gravity perception occurs in a small region below the cap in F. velutipes, but a larger zone in C. cinereus.
    • Spaceflight confirmed gravitropism as a response to the unidirectional gravity vector; perception thresholds and times were determined.

    Conclusions:

    • Fungal responses to gravity are linked to ecological and structural adaptations.
    • Cellular mechanisms involve differential cell elongation in C. cinereus and microvacuole redistribution in F. velutipes.
    • Gravity perception relies on the actin cytoskeleton and potentially involves statoliths (nuclei) interacting with it.