Cited by 263Protist diversity and phylogenyPhotoreceptor and optogenetics researchLight effects on plants

Evolution of phototaxis

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Jékely, Gáspár·2009·Philosophical Transactions of the Royal Society B Biological Sciences

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.

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Research works printed but not linked: 2

  1. Cavalier-Smith T. 1999a Principles of protein and lipid targeting in secondary symbiogenesis: euglenoid, dinoflagellate, and sporozoan plastid origins and the eukaryote family tree. J. Eukaryot. Microbiol. 46, 347– 366 18092388
  2. Häder D. P. Jori G. 2001 Photomovement Amsterdam, The Netherlands: Elsevier

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Authors
Jékely, G.
Affiliations
Max Planck Institute for Developmental Biology (DE)
Corresponding author
Jékely, Gáspár
Venue
Philosophical Transactions of the Royal Society B Biological Sciences
Published
2009-10-12
Volume
364
Issue
1531
Pages
2795-2808
ISSN
  • 0962-8436 (ISSN-L)
  • 1471-2970
OpenAlex
W2141016789
Cited by
263
References
155
Citations by year
2026: 16 · 2025: 24 · 2024: 35 · 2023: 16 · 2022: 13 · 2021: 23 · 2020: 22 · 2019: 14 · 2018: 10 · 2017: 17 · 2016: 16 · 2015: 11 · 2014: 8 · 2013: 11 · 2012: 9
FWCI
0.69
Type
journal article
Language
en
Open access
Locations
  • Philosophical Transactions of the Royal Society B Biological Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protist diversity and phylogeny
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Photoreceptor and optogenetics research
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
Keywords
phototaxis, biased random walk, filamentous cyanobacteria, helical swimming, cell polarity, cell shape, endosymbiosis, chloroplast origin, microbial mats
MeSH terms
Animals, Biological Evolution, Prokaryotic Cells, Light Signal Transduction, Eukaryota

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