Multigene phylogenetics of euglenids based on single-cell transcriptomics of diverse phagotrophs

0554256 - BC 2022 RIV US eng J - Článek v odborném periodiku
Lax, G. - Kolísko, Martin - Eglit, Y. - Lee, W. - Yubuki, N. - Karnkowska, A. - Leander, B. S. - Burger, G. - Keeling, P. J. - Simpson, A.
Multigene phylogenetics of euglenids based on single-cell transcriptomics of diverse phagotrophs.
Molecular Phylogenetics and Evolution. Roč. 159, JUN 2021 (2021), č. článku 107088. ISSN 1055-7903. E-ISSN 1095-9513
Institucionální podpora: RVO:60077344
Klíčová slova: living heterotrophic euglenids * ssu rdna data * character evolution * postgaardi-mariagerensis * feeding apparatus * n. gen. * ultrastructure * euglenozoa * position * software * Cell motility * Euglenozoa * Phylogenomics * Protozoa * Spirocuta * Symbiontida
Obor OECD: Genetics and heredity (medical genetics to be 3)
Impakt faktor: 5.019, rok: 2021
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S105579032100021X?via%3Dihub

Euglenids are a well-known group of single-celled eukaryotes, with phototrophic, osmotrophic and phagotrophic members. Phagotrophs represent most of the phylogenetic diversity of euglenids, and gave rise to the phototrophs and osmotrophs, but their evolutionary relationships are poorly understood. Symbiontids, in contrast, are anaerobes that are alternatively inferred to be derived euglenids, or a separate euglenozoan group. Most phylogenetic studies of euglenids have examined the SSU rDNA only, which is often highly divergent. Also, many phagotrophic euglenids (and symbiontids) are uncultured, restricting collection of other molecular data. We generated transcriptome data for 28 taxa, mostly using a single-cell approach, and conducted the first multigene phylogenetic analyses of euglenids to include phagotrophs and symbiontids. Euglenids are recovered as monophyletic, with symbiontids forming an independent branch within Euglenozoa. Spirocuta, the clade of flexible euglenids that contains both the phototrophs (Euglenophyceae) and osmotrophs (Aphagea), is robustly resolved, with the ploeotid Olkasia as its sister group, forming the new taxon Olkaspira. Ploeotids are paraphyletic, although Ploeotiidae (represented by Ploeotia spp.), Lentomonas, and Keelungia form a robust clade (new taxon Alistosa). Petalomonadida branches robustly as sister to other euglenids in outgroup-rooted analyses. Within Spirocuta, Euglenophyceae is a robust clade that includes Rapaza, and Anisonemia is a well-supported monophyletic group containing Anisonemidae (Anisonema and Dinema spp.), 'Heteronema II' (represented by H. vittatum), and a clade of Neometanema plus Aphagea. Among 'peranemid' phagotrophs, Chasmostoma branches with included Urceolus, and Peranema with the undescribed 'Jenningsia II', while other relationships are weakly supported and consequently the closest sister group to Euglenophyceae remains unresolved. Our results are inconsistent with recent inferences that Entosiphon is the evolutionarily pivotal sister either to other euglenids, or to Spirocuta. At least three transitions between posterior and anterior flagellar gliding occurred in euglenids, with the phylogenetic positions and directions of those transitions remaining ambiguous.
Trvalý link: http://hdl.handle.net/11104/0328876