Evidence map›Paper›PMID 30890026›Full record

ReviewOpen biology2019

Thinking twice about the evolution of photosynthesis.

Tanai Cardona

Open access · goldAbstract readReview
In one paragraph

Review in Open biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.4field-weighted citation impact, top 7% 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

33 citing papers in PubMed, 78 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
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  7. What the earliest evidence for life tells us about the early evolution of the biosphere.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  8. Review
  9. Article
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  11. Diversity and abundance of filamentous and non-filamentous "Applied and environmental microbiology · 2025
    Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Cryo-EM structure of the whole photosynthetic reaction center apparatus from the green sulfur bacteriumProceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  17. Article
  18. Article
  19. Article
  20. Article
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

1 author at 1 institution in 1 country.

Tanai CardonaDepartment of Life Sciences, Imperial College London , London , UK.
Imperial College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sam Granick opened his seminal 1957 paper titled 'Speculations on the origins and evolution of photosynthesis' with the assertion that there is a constant urge in human beings to seek beginnings (I concur). This urge has led to an incessant stream of speculative ideas and debates on the evolution of photosynthesis that started in the first half of the twentieth century and shows no signs of abating. Some of these speculative ideas have become commonplace, are taken as fact, but find little support. Here, I review and scrutinize three widely accepted ideas that underpin the current study of the evolution of photosynthesis: first, that the photochemical reaction centres used in anoxygenic photosynthesis are more primitive than those in oxygenic photosynthesis; second, that the probability of acquiring photosynthesis via horizontal gene transfer is greater than the probability of losing photosynthesis; and third, and most important, that the origin of anoxygenic photosynthesis pre-dates the origin of oxygenic photosynthesis. I shall attempt to demonstrate that these three ideas are often grounded in incorrect assumptions built on more assumptions with no experimental or observational support. I hope that this brief review will not only serve as a cautionary tale but also that it will open new avenues of research aimed at disentangling the complex evolution of photosynthesis and its impact on the early history of life and the planet.

Indexed as

Biological EvolutionOrigin of LifeBacterial ProteinsCyanobacteriaEarth, PlanetOxygenPhotosynthesisPhotosystem II Protein ComplexPhotosystem I Protein ComplexBacterial ProteinsOxygenPhotosystem II Protein ComplexPhotosystem I Protein Complexanoxygenicoxygenicphotosynthesisphotosystemreaction centrewater oxidation

Identifiers

PMID30890026
PMCPMC6451369
OpenAlexW2903280064

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.