Plant Systematics and Evolution

, Volume 164, Issue 1–4, pp 75–91 | Cite as

Gymnodinium aeruginosum (Dinophyta): A blue-green dinoflagellate with a vestigial, anucleate, cryptophycean endosymbiont

  • E. Schnepf
  • S. Winter
  • D. Mollenhauer
Article

Abstract

Gymnodinium aeruginosum has the usual fine structure of a dinoflagellate but does not seem to contain a well elaborated peduncle or a microtubular basket. Naked cells are surrounded by a single large amphiesmal vesicle. It houses an endosymbiont with typical blue-green cryptophycean chloroplasts (generally only one), cryptophycean starch grains in the periplastidal cytoplasm without a nucleomorph, and two membranes separating the periplastidal cytoplasm from the cryptophycean cytoplasm which contains mitochondria, ER, vesicles and ribosomes, but no eukaryotic nucleus. The endosymbiont is surrounded by a single membrane. Possible ways of the acquisition of the endosymbiont and the problem of the existence of ribosomes within a compartment without nucleus are discussed.

Key words

Algae Dinophyta Gymnodinium aeruginosum Anucleate cryptophycean endosymbiont evolution ribosomes in an anucleate compartment 

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • E. Schnepf
    • 1
  • S. Winter
    • 1
  • D. Mollenhauer
    • 2
  1. 1.Lehrstuhl für Zellenlehre, Fakultät für BiologieUniversität HeidelbergHeidelbergFederal Republic of Germany
  2. 2.Außenstelle LochmühleForschungsinstitut SenckenbergBiebergemünd-BieberFederal Republic of Germany

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