Evidence map›Paper›PMID 19720645›Full record

ReviewPhilosophical transactions of the Royal Society of London. Series B, Biological sciences2009

Evolution of phototaxis.

Gáspár Jékely

Open access · greenAbstract readReview
In one paragraph

Review in Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 89 papers.

0numbers the graph read from it
0cells of the map it votes in
89citing papers in PubMed
3.2field-weighted citation impact, top 8% 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

89 citing papers in PubMed, 257 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Algal optics.Physical review. E · 2026
    Article
  5. A Versatile Strategy for Light-Driven Active Transport of Ions.Angewandte Chemie (International ed. in English) · 2026
    Article
  6. Article
  7. Phototactic Decision-Making by Microalgae.Physical review letters · 2025
    Article
  8. Anisotropic fluorescence emission by diatoms modifies the underwater oceanic light field.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  9. Physics of microbial taxis and behaviours in response to various physical stimuli.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2025
    Review
  10. Article
  11. Article
  12. Light-regulated chloroplast morphodynamics in a single-celled dinoflagellate.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  13. Article
  14. Article
  15. Article
  16. Densitaxis: Active particle motion in density gradients.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  17. Article
  18. Article
  19. Article
  20. Review

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

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.

Gáspár JékelyMax Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany. gaspar.jekely@tuebingen.mpg.de
Max Planck Institute for Developmental Biology · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Phototaxis in the broadest sense means positive or negative displacement along a light gradient or vector. Prokaryotes most often use a biased random walk strategy, employing type I sensory rhodopsin photoreceptors and two-component signalling to regulate flagellar reversal. This strategy only allows phototaxis along steep light gradients, as found in microbial mats or sediments. Some filamentous cyanobacteria evolved the ability to steer towards a light vector. Even these cyanobacteria, however, can only navigate in two dimensions, gliding on a surface. In contrast, eukaryotes evolved the capacity to follow a light vector in three dimensions in open water. This strategy requires a polarized organism with a stable form, helical swimming with cilia and a shading or focusing body adjacent to a light sensor to allow for discrimination of light direction. Such arrangement and the ability of three-dimensional phototactic navigation evolved at least eight times independently in eukaryotes. The origin of three-dimensional phototaxis often followed a transition from a benthic to a pelagic lifestyle and the acquisition of chloroplasts either via primary or secondary endosymbiosis. Based on our understanding of the mechanism of phototaxis in single-celled eukaryotes and animal larvae, it is possible to define a series of elementary evolutionary steps, each of potential selective advantage, which can lead to pelagic phototactic navigation. We can conclude that it is relatively easy to evolve phototaxis once cell polarity, ciliary swimming and a stable cell shape are present.

Indexed as

Biological EvolutionAnimalsEukaryotaLight Signal TransductionProkaryotic Cells

Identifiers

PMID19720645
PMCPMC2781859
OpenAlexW2141016789

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.