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Foraging mechanisms in excavate flagellates shed light on the functional ecology of early eukaryotes.
Suzuki-Tellier, Sei; Miano, Federica; Asadzadeh, Seyed Saeed; Simpson, Alastair G B; Kiørboe, Thomas.
Afiliação
  • Suzuki-Tellier S; Centre for Ocean Life, National Institute of Aquatic Resources, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
  • Miano F; Centre for Ocean Life, National Institute of Aquatic Resources, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
  • Asadzadeh SS; Centre for Ocean Life, National Institute of Aquatic Resources, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
  • Simpson AGB; Department of Biology, Centre for Comparative Genomics and Evolutionary Bioinformatics, Dalhousie University, Halifax NS B3H 4R2, Canada.
  • Kiørboe T; Centre for Ocean Life, National Institute of Aquatic Resources, Technical University of Denmark, Kgs Lyngby 2800, Denmark.
Proc Natl Acad Sci U S A ; 121(22): e2317264121, 2024 May 28.
Article em En | MEDLINE | ID: mdl-38781211
ABSTRACT
The phagotrophic flagellates described as "typical excavates" have been hypothesized to be morphologically similar to the Last Eukaryotic Common Ancestor and understanding the functional ecology of excavates may therefore help shed light on the ecology of these early eukaryotes. Typical excavates are characterized by a posterior flagellum equipped with a vane that beats in a ventral groove. Here, we combined flow visualization and observations of prey capture in representatives of the three clades of excavates with computational fluid dynamic modeling, to understand the functional significance of this cell architecture. We record substantial differences amongst species in the orientation of the vane and the beat plane of the posterior flagellum. Clearance rate magnitudes estimated from flow visualization and modeling are both like that of other similarly sized flagellates. The interaction between a vaned flagellum beating in a confinement is modeled to produce a very efficient feeding current at low energy costs, irrespective of the beat plane and vane orientation and of all other morphological variations. Given this predicted uniformity of function, we suggest that the foraging systems of typical excavates studied here may be good proxies to understand those potentially used by our distant ancestors more than 1 billion years ago.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Flagelos Limite: Animals Idioma: En Revista: Proc Natl Acad Sci U S A Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Dinamarca

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Flagelos Limite: Animals Idioma: En Revista: Proc Natl Acad Sci U S A Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Dinamarca