Telonemia, a new protist phylum with affinity to chromist lineages
10 pages, 4 figures.-- The electronic supplementary material is available at https://doi.org/10.1098/rspb.2006.3515
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| Subjects: | Telonema, Telonemia, Environmental sequences, Phylogeny, Covarion substitution pattern, |
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dig-icm-es-10261-272822021-12-27T16:18:02Z Telonemia, a new protist phylum with affinity to chromist lineages Shalchian-Tabrizi, Kamran Eikrem, Wenche Klaveness, Dag Vaulot, Daniel Minge, M.A. Le Gall, F. Romari, Khadidja Throndsen, J. Botnen, A. Massana, Ramon Thomsen, H.A. Jakobsen, Kjetill S. Telonema Telonemia Environmental sequences Phylogeny Covarion substitution pattern 10 pages, 4 figures.-- The electronic supplementary material is available at https://doi.org/10.1098/rspb.2006.3515 Recent molecular investigations of marine samples taken from different environments, including tropical, temperate and polar areas, as well as deep thermal vents, have revealed an unexpectedly high diversity of protists, some of them forming deep-branching clades within important lineages, such as the alveolates and heterokonts. Using the same approach on coastal samples, we have identified a novel group of protist small subunit (SSU) rDNA sequences that do not correspond to any phylogenetic group previously identified. Comparison with other sequences obtained from cultures of heterotrophic protists showed that the environmental sequences grouped together with Telonema, a genus known since 1913 but of uncertain taxonomic affinity. Phylogenetic analyses using four genes (SSU, Hsp90, alpha-tubulin and beta-tubulin), and accounting for gamma- and covarion-distributed substitution rates, revealed Telonema as a distinct group of species branching off close to chromist lineages. Consistent with these gene trees, Telonema possesses ultrastructures revealing both the distinctness of the group and the evolutionary affinity to chromist groups. Altogether, the data suggest that Telonema constitutes a new eukaryotic phylum, here defined as Telonemia, possibly representing a key clade for the understanding of the early evolution of bikont protist groups, such as the proposed chromalveolate supergroup This work was supported in part by grants from the Norwegian Research Council (to K.S.J. and D.K.) and the programs PICODIV (EVK3-CT-1999-00021), PicManche, CNRS-Aventis fund, CNRS PROOF BIOSOPE, CPER Souchothèque de Bretagne and CRB (to D.V.) Peer reviewed 2006-07 artículo http://purl.org/coar/resource_type/c_6501 Proceedings of the Royal Society B: Biological Sciences 273(1595): 1833-1842 (2006) 0962-8452 10261/27282 10.1098/rspb.2006.3515 1471-2954 16790418 en https://doi.org/10.1098/rspb.2006.3515 none Royal Society (Great Britain) |
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Telonema Telonemia Environmental sequences Phylogeny Covarion substitution pattern Telonema Telonemia Environmental sequences Phylogeny Covarion substitution pattern |
| spellingShingle |
Telonema Telonemia Environmental sequences Phylogeny Covarion substitution pattern Telonema Telonemia Environmental sequences Phylogeny Covarion substitution pattern Shalchian-Tabrizi, Kamran Eikrem, Wenche Klaveness, Dag Vaulot, Daniel Minge, M.A. Le Gall, F. Romari, Khadidja Throndsen, J. Botnen, A. Massana, Ramon Thomsen, H.A. Jakobsen, Kjetill S. Telonemia, a new protist phylum with affinity to chromist lineages |
| description |
10 pages, 4 figures.-- The electronic supplementary material is available at https://doi.org/10.1098/rspb.2006.3515 |
| format |
artículo |
| topic_facet |
Telonema Telonemia Environmental sequences Phylogeny Covarion substitution pattern |
| author |
Shalchian-Tabrizi, Kamran Eikrem, Wenche Klaveness, Dag Vaulot, Daniel Minge, M.A. Le Gall, F. Romari, Khadidja Throndsen, J. Botnen, A. Massana, Ramon Thomsen, H.A. Jakobsen, Kjetill S. |
| author_facet |
Shalchian-Tabrizi, Kamran Eikrem, Wenche Klaveness, Dag Vaulot, Daniel Minge, M.A. Le Gall, F. Romari, Khadidja Throndsen, J. Botnen, A. Massana, Ramon Thomsen, H.A. Jakobsen, Kjetill S. |
| author_sort |
Shalchian-Tabrizi, Kamran |
| title |
Telonemia, a new protist phylum with affinity to chromist lineages |
| title_short |
Telonemia, a new protist phylum with affinity to chromist lineages |
| title_full |
Telonemia, a new protist phylum with affinity to chromist lineages |
| title_fullStr |
Telonemia, a new protist phylum with affinity to chromist lineages |
| title_full_unstemmed |
Telonemia, a new protist phylum with affinity to chromist lineages |
| title_sort |
telonemia, a new protist phylum with affinity to chromist lineages |
| publisher |
Royal Society (Great Britain) |
| work_keys_str_mv |
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