Evidence map›Paper›PMID 28132810›Full record

ArticleCurrent biology : CB2017

An Early-Branching Freshwater Cyanobacterium at the Origin of Plastids.

Rafael I Ponce-Toledo, Philippe Deschamps, Purificación López-García, Yvan Zivanovic, Karim Benzerara, David Moreira

Open access · bronzeAbstract read
In one paragraph

Article in Current biology : CB, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 122 papers.

0numbers the graph read from it
0cells of the map it votes in
122citing papers in PubMed
14.2field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

122 citing papers in PubMed, 312 citations in OpenAlex.

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  15. Nuclear genome sequencing reveals the highly intron-rich architecture of the chlorarachniophyte alga Amorphochlora amoebiformis.DNA research : an international journal for rapid publication of reports on genes and genomes · 2025
    Article
  16. Rubisco is slow across the tree of life.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  17. Article
  18. A diverse Palaeoproterozoic microbial ecosystem implies early eukaryogenesis.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  19. Review
  20. Distinct cell division features inJournal of bacteriology · 2025
    Review

62 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Rafael I Ponce-ToledoUnité d'Ecologie, Systématique et Evolution, CNRS UMR 8079, Université Paris-Sud/Paris-Saclay, AgroParisTech, 91400 Orsay, France.
Philippe DeschampsUnité d'Ecologie, Systématique et Evolution, CNRS UMR 8079, Université Paris-Sud/Paris-Saclay, AgroParisTech, 91400 Orsay, France.
Purificación López-GarcíaUnité d'Ecologie, Systématique et Evolution, CNRS UMR 8079, Université Paris-Sud/Paris-Saclay, AgroParisTech, 91400 Orsay, France.
Yvan ZivanovicInstitut de Génétique et Microbiologie, CNRS UMR 8621, Université Paris-Sud/Paris-Saclay, 91405 Orsay, France.
Karim BenzeraraInstitut de Minéralogie, de Physique des Matériaux, et de Cosmochimie, Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 7590, Muséum National d'Histoire Naturelle, IRD UMR 206, 75005 Paris, France.
David MoreiraUnité d'Ecologie, Systématique et Evolution, CNRS UMR 8079, Université Paris-Sud/Paris-Saclay, AgroParisTech, 91400 Orsay, France. Electronic address: david.moreira@u-psud.fr.
Université Paris-Sud · FRCentre National de la Recherche Scientifique · FR

Funding

European Research Council 322669
6 · The paper itself

Abstract

Photosynthesis evolved in eukaryotes by the endosymbiosis of a cyanobacterium, the future plastid, within a heterotrophic host. This primary endosymbiosis occurred in the ancestor of Archaeplastida, a eukaryotic supergroup that includes glaucophytes, red algae, green algae, and land plants [1-4]. However, although the endosymbiotic origin of plastids from a single cyanobacterial ancestor is firmly established, the nature of that ancestor remains controversial: plastids have been proposed to derive from either early- or late-branching cyanobacterial lineages [5-11]. To solve this issue, we carried out phylogenomic and supernetwork analyses of the most comprehensive dataset analyzed so far including plastid-encoded proteins and nucleus-encoded proteins of plastid origin resulting from endosymbiotic gene transfer (EGT) of primary photosynthetic eukaryotes, as well as wide-ranging genome data from cyanobacteria, including novel lineages. Our analyses strongly support that plastids evolved from deep-branching cyanobacteria and that the present-day closest cultured relative of primary plastids is Gloeomargarita lithophora. This species belongs to a recently discovered cyanobacterial lineage widespread in freshwater microbialites and microbial mats [12, 13]. The ecological distribution of this lineage sheds new light on the environmental conditions where the emergence of photosynthetic eukaryotes occurred, most likely in a terrestrial-freshwater setting. The fact that glaucophytes, the first archaeplastid lineage to diverge, are exclusively found in freshwater ecosystems reinforces this hypothesis. Therefore, not only did plastids emerge early within cyanobacteria, but the first photosynthetic eukaryotes most likely evolved in terrestrial-freshwater settings, not in oceans as commonly thought.

Indexed as

Biological EvolutionCyanobacteriaEukaryotaFresh WaterGene Regulatory NetworksPhotosynthesisPhylogenyPlastidsSymbiosischloroplastscyanobacteriaevolutionmolecular phylogenyphylogenomicsplastids

Identifiers

PMID28132810
PMCPMC5650054
OpenAlexW2582230829

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

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.