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Related Experiment Video

Updated: Jul 11, 2026

$Quantitative Locomotion Study of Freely Swimming Micro-organisms Using Laser Diffraction$

Quantitative Locomotion Study of Freely Swimming Micro-organisms Using Laser Diffraction

Published on: October 25, 2012

How dinoflagellates swim.

¹Marine Biological Laboratory (University of Copenhagen), Helsingør, Denmark. tfenchel@zi.ku.dk

|February 2, 2002

Summary

Dinoflagellates swim using two flagella, creating a helical path for precise steering. This unique mechanism allows them to navigate chemical gradients effectively.

Area of Science:

* Marine biology
* Microbiology
* Biomechanics

Background:

* Dinoflagellates are a diverse group of planktonic organisms. * They possess unique flagellar structures crucial for motility. * Understanding their swimming behavior is key to ecological studies.

Purpose of the Study:

* To elucidate the biomechanics of dinoflagellate swimming. * To explain how flagellar motion facilitates steering and orientation. * To detail the mechanism of helical klinotaxis.

Main Methods:

* Analysis of flagellar function and cell rotation. * Mathematical modeling of swimming paths. * Observation of cell movement in response to stimuli.

Main Results:

* Dinoflagellates utilize two flagella (transversal and longitudinal) for locomotion. * Independent control over flagellar components allows for variable helical swimming paths. * This enables precise steering and orientation in chemical gradients.

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$Quantitative Locomotion Study of Freely Swimming Micro-organisms Using Laser Diffraction$

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Published on: October 25, 2012

Biophysical Characterization of Flagellar Motor Functions

Biophysical Characterization of Flagellar Motor Functions

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Investigating Flagella-Driven Motility in Escherichia coli by Applying Three Established Techniques in a Series

Investigating Flagella-Driven Motility in Escherichia coli by Applying Three Established Techniques in a Series

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Conclusions:

* Dinoflagellate motility is characterized by a complex, controllable helical trajectory. * The two-flagella system provides three degrees of freedom for active navigation. * This mechanism, termed helical klinotaxis, is vital for dinoflagellates' ecological success.