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Cyanobacterial Endosymbionts in the Benthic DinoflagellateSinophysis canaliculata(Dinophysiales, Dinophyceae)

Authors
Journal
Protist
1434-4610
Publisher
Elsevier
Publication Date
Volume
162
Issue
2
Identifiers
DOI: 10.1016/j.protis.2010.07.003
Keywords
  • Cyanobacteria
  • Primary Endosymbiosis
  • Sinophysis
  • Tem
  • Ultrastructure.

Abstract

Photosynthetic dinoflagellates possess a great diversity of plastids that have been acquired through successful serial endosymbiosis. The peridinin-containing plastid in dinoflagellates is canonical, but many other types are known within this group. Within the Dinophysiales, several species of Dinophysis contain plastids, derived from cryptophytes or haptophytes. In this work, the presence of numerous intracellular cyanobacteria-like microorganisms compartmentalized by a separate membrane is reported for the first time within the benthic dinophysoid dinoflagellate Sinophysis canaliculata Quod et al., a species from a genus morphologically close to Dinophysis. Although the contribution of these cyanobacterial endosymbionts to S. canaliculata is still unknown, this finding suggests a possible undergoing primary endosymbiosis in a dinoflagellate.

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