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Biomineralization in coccolithophores.

M E Marsh1

  • 1Department of Basic Sciences, University of Texas, Houston Health Science Center 77030, USA.

Gravitational and Space Biology Bulletin : Publication of the American Society for Gravitational and Space Biology
|September 7, 2001
PubMed
Summary

Coccolithophores, marine algae, offer insights into how gravity affects biomineralization. Studying their calcite scale (coccolith) formation reveals processes like ion transport, nucleation, and crystal growth.

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Area of Science:

  • Biomineralization
  • Marine Biology
  • Gravitational Biology

Background:

  • Coccolithophores are unicellular marine algae.
  • They produce calcite scales called coccoliths.
  • Mutants with mineral defects are available for study.

Purpose of the Study:

  • To review the effects of Earth's gravity on coccolith mineralization.
  • To summarize current knowledge on coccolith formation phases.

Main Methods:

  • Review of existing research on coccolith mineralization.
  • Focus on Pleurochrysis carterae and Emiliania huxleyi.

Main Results:

  • Coccolith formation involves ion transport, nucleation, and crystal growth.
  • These processes occur within specialized Golgi-derived vesicles.
  • Mineral defects can impact orientation, morphology, number, and size.

Conclusions:

  • Coccolithophores are valuable models for studying biomineralization under gravity.
  • Further research can elucidate gravity's role in biological calcite formation.

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