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Stress-Induced Dinoflagellate Bioluminescence at the Single Cell Level

Maziyar Jalaal, Nico Schramma, Antoine Dode, Hélène de Maleprade, Christophe Raufaste, View ORCID ProfileRaymond E. Goldstein
doi: https://doi.org/10.1101/2020.03.18.997544
Maziyar Jalaal
1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom
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Nico Schramma
1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom
2Max-Planck Institute for Dynamics and Self-Organization, Göttingen, Germany
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Antoine Dode
1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom
3École Polytechnique, 91128 Palaiseau Cedex, France
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Hélène de Maleprade
1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom
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Christophe Raufaste
1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom
4Université Côte d’Azur, CNRS, Institut de Physique de Nice, CNRS, 06100 Nice, France
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Raymond E. Goldstein
1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom
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  • ORCID record for Raymond E. Goldstein
  • For correspondence: r.e.goldstein@damtp.cam.ac.uk
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Abstract

One of the characteristic features of many marine dinoflagellates is their bioluminescence, which lights up nighttime breaking waves or seawater sliced by a ship’s prow. While the internal biochemistry of light production by these microorganisms is well established, the manner by which fluid shear or mechanical forces trigger bioluminescence is still poorly understood. We report controlled measurements of the relation between mechanical stress and light production at the single-cell level, using high-speed imaging of micropipette-held cells of the marine dinoflagellate Pyrocystis lunula subjected to localized fluid flows or direct indentation. We find a viscoelastic response in which light intensity depends on both the amplitude and rate of deformation, consistent with the action of stretch-activated ion channels. A phenomenological model captures the experimental observations.

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Posted March 18, 2020.
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Stress-Induced Dinoflagellate Bioluminescence at the Single Cell Level
Maziyar Jalaal, Nico Schramma, Antoine Dode, Hélène de Maleprade, Christophe Raufaste, Raymond E. Goldstein
bioRxiv 2020.03.18.997544; doi: https://doi.org/10.1101/2020.03.18.997544
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Stress-Induced Dinoflagellate Bioluminescence at the Single Cell Level
Maziyar Jalaal, Nico Schramma, Antoine Dode, Hélène de Maleprade, Christophe Raufaste, Raymond E. Goldstein
bioRxiv 2020.03.18.997544; doi: https://doi.org/10.1101/2020.03.18.997544

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