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One, two, three: nature's tool box for building plastids.

Bettina Stoebe1, Uwe-G Maier

  • 1Heinrich-Heine-Universität Düsseldorf, Düsseldorf.

Protoplasma
|July 9, 2002
PubMed
Summary

Plastids, the photosynthetic organelles in eukaryotes, are acquired through primary, secondary, and tertiary endosymbiosis. Dinoflagellates exhibit complex strategies, including temporary plastid theft and tertiary endosymbiosis, showcasing evolutionary innovation.

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Area of Science:

  • Endosymbiotic theory and evolutionary biology
  • Photosynthetic organelle evolution
  • Dinoflagellate biology

Background:

  • Plastids, essential for photosynthesis, originated via endosymbiosis.
  • Primary endosymbiosis involved cyanobacteria engulfed by early eukaryotes.
  • Secondary plastids arose from the engulfment of red or green algae.

Purpose of the Study:

  • To explore diverse strategies of plastid acquisition in eukaryotes.
  • To investigate complex endosymbiotic events in dinoflagellates.
  • To detail the process of tertiary endosymbiosis.

Main Methods:

  • Review of existing literature on endosymbiosis and plastid evolution.
  • Comparative analysis of plastid acquisition mechanisms across different lineages.
  • Focus on dinoflagellate-specific strategies for obtaining photosynthetic organelles.

Main Results:

  • Eukaryotes acquire plastids through primary, secondary, and tertiary endosymbiosis.
  • Dinoflagellates display unique plastid acquisition strategies, including secondary and tertiary endosymbiosis.
  • Some dinoflagellates utilize 'stolen plastids' temporarily, while others integrate symbionts with secondary plastids (tertiary endosymbiosis).

Conclusions:

  • Plastid evolution is characterized by diverse endosymbiotic events.
  • Dinoflagellates represent a model system for studying complex plastid acquisition.
  • Tertiary endosymbiosis represents the highest complexity in plastid evolution observed in dinoflagellates.

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