Cited by 50Protist diversity and phylogenyPhotosynthetic Processes and MechanismsPlant Diversity and Evolution

Signal Conflicts in the Phylogeny of the Primary Photosynthetic Eukaryotes

Open access
Deschamps, P., Moreira, D.·2009·Molecular Biology and Evolution

Abstract

It is widely accepted that the first photosynthetic eukaryotes arose from a single primary endosymbiosis of a cyanobacterium in a phagotrophic eukaryotic host, which led to the emergence of three major lineages: Chloroplastida (green algae and land plants), Rhodophyta, and Glaucophyta. For a long time, Glaucophyta have been thought to represent the earliest branch among them. However, recent massive phylogenomic analyses of nuclear genes have challenged this view, because most of them suggested a basal position of Rhodophyta, though with moderate statistical support. We have addressed this question by phylogenomic analysis of a large data set of 124 proteins transferred from the chloroplast to the nuclear genome of the three Archaeplastida lineages. In contrast to previous analyses, we found strong support for the basal emergence of the Chloroplastida and the sister-group relationship of Glaucophyta and Rhodophyta. Moreover, the reanalysis of chloroplast gene sequences using methods more robust against compositional and evolutionary rate biases sustained the same result. Finally, we observed that the basal position of Rhodophyta found in the phylogenies based on nuclear genes depended on the sampling of sequences used as outgroup. When eukaryotes supposed to have never had plastids (animals and fungi) were used, the analysis strongly supported the early emergence of Glaucophyta instead of Rhodophyta. Therefore, there is a conflicting signal between genes of different evolutionary origins supporting either the basal branching of Glaucophyta or of Chloroplastida within the Archaeplastida. This second possibility would agree with the existence of the subkingdom Biliphyta, joining Glaucophyta and Rhodophyta.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1093/molbev/msp189

Cites

38 of 38 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Microalgal species being investigated as potential biofuel crops originate from groups whose ancestral relationships are significantly broader than the most diverse land plants, providing a wealth of genetic diversity.

    “The microalgal species being investigated as potential biofuel crops originate from groups whose ancestral relationships are significantly broader than the most diverse land plants, providing a wealth of genetic diversity [20,21].”

    From Biofuels from algae: Challenges and potential (2010) · cites this paper as [20]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

1 retracted

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Deschamps, P., & Moreira, D.
Affiliations
Université Paris-Sud (FR)
Venue
Molecular Biology and Evolution
Published
2009-08-25
Volume
26
Issue
12
Pages
2745-2753
ISSN
  • 0737-4038 (ISSN-L)
  • 1537-1719
OpenAlex
W1973201874
Cited by
50
References
38
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2022: 1 · 2021: 3 · 2019: 3 · 2018: 4 · 2017: 4 · 2016: 3 · 2015: 2 · 2014: 9 · 2013: 3 · 2012: 5
FWCI
2.01
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology and Evolution (publishedVersion)
  • PubMed (publishedVersion)
Funders
Agence Nationale de la Recherche
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protist diversity and phylogeny
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Plant Diversity and Evolution
Keywords
primary endosymbiosis, Archaeplastida, Glaucophyta, red algae, plastid evolution, phylogenomics, nuclear genes, chloroplast genes, outgroup selection, green algae
MeSH terms
Archaea, Bayes Theorem, Cell Nucleus, Chloroplasts, Genetic Markers, Photosynthesis, Phylogeny, Proteins, Symbiosis, Gene Transfer, Horizontal, Eukaryota

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review