Evidence map›Paper›PMID 20534135›Full record

ArticleBMC microbiology2010

Telonemia-specific environmental 18S rDNA PCR reveals unknown diversity and multiple marine-freshwater colonizations.

Jon Bråte, Dag Klaveness, Tellef Rygh, Kjetill S Jakobsen, Kamran Shalchian-Tabrizi

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In one paragraph

Article in BMC microbiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed.

  1. Phylogenomic Analysis of Deep-Branching Telonemid.Genome biology and evolution · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Jon BråteUniversity of Oslo, Department of Biology, Microbial Evolution Research Group (MERG), N-0316 Oslo, Norway. kamran@bio.uio.no.
Dag Klaveness
Tellef Rygh
Kjetill S Jakobsen
Kamran Shalchian-Tabrizi

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRecent surveys of eukaryote 18S rDNA diversity in marine habitats have uncovered worldwide distribution of the heterotrophic eukaryote phylum Telonemia. Here we investigate the diversity and geographic distribution of Telonemia sequences by in-depth sequencing of several new 18S rDNA clone libraries from both marine and freshwater sites by using a Telonemia-specific PCR strategy.

resultsIn contrast to earlier studies that have employed eukaryote-wide PCR design, we identified a large and unknown diversity of phylotypes and the first rigorous evidence for several freshwater species, altogether comprising 91 unique sequences. Phylogenies of these and publicly available sequences showed 20 statistically supported sub-clades as well as several solitary phylotypes with no clear phylogenetic affiliation. Most of these sub-clades were composed of phylotypes from different geographic regions.

conclusionsBy using specific PCR primers we reveal a much larger diversity of Telonemia from environmental samples than previously uncovered by eukaryote-wide primers. The new data substantially diminish the geographic structuring of clades identified in earlier studies. Nevertheless, since these clades comprise several distinct phylotypes we cannot exclude endemicity at species level. We identified two freshwater clades and a few solitary phylotypes, implying that Telonemia have colonized freshwater habitats and adapted to the different environmental and ecological conditions at independent occasions.

Indexed as

AnimalsDemographyDNADNA, RibosomalEnvironmental MonitoringFresh WaterPhylogenyPolymerase Chain ReactionRNA, Ribosomal, 18SSeawaterDNADNA, RibosomalRNA, Ribosomal, 18S

Identifiers

PMID20534135
PMCPMC2891722

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.