New Parabasalia symbionts Snyderella spp. and Daimonympha gen. nov. from South American Rugitermes termites and the parallel evolution of a cell with a rotating "head".

Autor: Hehenberger E; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.; Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic., Boscaro V; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada., James ER; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada., Hirakawa Y; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada., Trznadel M; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada., Mtawali M; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada., Fiorito R; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada., Del Campo J; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.; Institut de Biologia Evolutiva, CSIC-Universitat Pompeu Fabra, Barcelona, Spain., Karnkowska A; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.; Institute of Evolutionary Biology, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland., Kolisko M; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.; Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic., Irwin NAT; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.; Merton College, University of Oxford, Oxford, UK., Mathur V; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.; Department of Biology, University of Oxford, Oxford, UK., Scheffrahn RH; Fort Lauderdale Research & Education Center, Davie, Florida, USA., Keeling PJ; Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.
Jazyk: angličtina
Zdroj: The Journal of eukaryotic microbiology [J Eukaryot Microbiol] 2023 Sep-Oct; Vol. 70 (5), pp. e12987. Date of Electronic Publication: 2023 Jun 19.
DOI: 10.1111/jeu.12987
Abstrakt: Most Parabasalia are symbionts in the hindgut of "lower" (non-Termitidae) termites, where they widely vary in morphology and degree of morphological complexity. Large and complex cells in the class Cristamonadea evolved by replicating a fundamental unit, the karyomastigont, in various ways. We describe here four new species of Calonymphidae (Cristamonadea) from Rugitermes hosts, assigned to the genus Snyderella based on diagnostic features (including the karyomastigont pattern) and molecular phylogeny. We also report a new genus of Calonymphidae, Daimonympha, from Rugitermes laticollis. Daimonympha's morphology does not match that of any known Parabasalia, and its SSU rRNA gene sequence corroborates this distinction. Daimonympha does however share a puzzling feature with a few previously described, but distantly related, Cristamonadea: a rapid, smooth, and continuous rotation of the anterior end of the cell, including the many karyomastigont nuclei. The function of this rotatory movement, the cellular mechanisms enabling it, and the way the cell deals with the consequent cell membrane shear, are all unknown. "Rotating wheel" structures are famously rare in biology, with prokaryotic flagella being the main exception; these mysterious spinning cells found only among Parabasalia are another, far less understood, example.
(© 2023 The Authors. Journal of Eukaryotic Microbiology published by Wiley Periodicals LLC on behalf of International Society of Protistologists.)
Databáze: MEDLINE
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