ArticleBiophysical journal2020
Diurnal Variations in the Motility of Populations of Biflagellate Microalgae.
Article in Biophysical journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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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.
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Who cites it
7 citing papers in PubMed.
- Motilitometer: A compact modular microscope for motility and photoresponse analysis of microorganisms.HardwareX · 2026Article
- Concentration-dependent responses of C. reinhardtii to silver ions: hormetic response in growth and reduction of motility.The European physical journal. E, Soft matter · 2025Article
- Preparation, maintenance and propagation of synchronous cultures of photoactive Chlamydomonas cells.Nature protocols · 2025Review
- Light-regulated chloroplast morphodynamics in a single-celled dinoflagellate.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Synergistic phenotypic adaptations of motile purple sulphur bacteria Chromatium okenii during lake-to-laboratory domestication.PloS one · 2024Article
- Motile bacteria leverage bioconvection for eco-physiological benefits in a natural aquatic environment.Frontiers in microbiology · 2023Article
- Sharp turns and gyrotaxis modulate surface accumulation of microorganisms.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The motility of microalgae has been studied extensively, particularly in model microorganisms such as Chlamydomonas reinhardtii. For this and other microalgal species, diurnal cycles are well known to control the metabolism, growth, and cell division. Diurnal variations, however, have been largely neglected in quantitative studies of motility. Here, we demonstrate using tracking microscopy how the motility statistics of C. reinhardtii are modulated by diurnal cycles. With nine independently inoculated cultures synchronized to the light-dark cycle at the exponential growth phase, we repeatedly observed that the mean swimming speed is greater during the dark period of a diurnal cycle. From this measurement, using a hydrodynamic power balance, we infer the mean flagellar beat frequency and conjecture that its diurnal variation reflects modulation of intracellular ATP. Our measurements also quantify the diurnal variations of the orientational and gravitactic transport of C. reinhardtii. We use this to explore the population-level consequences of diurnal variations of motility statistics by evaluating a prediction for how the gravitactic steady state changes with time during a diurnal cycle. Finally, we discuss the consequences of diurnal variations of microalgal motility in soil and pelagic environments.
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