Chlamydomonas swims with two "gears" in a eukaryotic version of run-and-tumble locomotion - PubMed

Affiliations

• PMID: 19628868
• DOI: 10.1126/science.1172667

Chlamydomonas swims with two "gears" in a eukaryotic version of run-and-tumble locomotion

Marco Polin et al. Science. 2009.

Abstract

The coordination of eukaryotic flagella is essential for many of the most basic processes of life (motility, sensing, and development), yet its emergence and regulation and its connection to locomotion are poorly understood. Previous studies show that the unicellular alga Chlamydomonas, widely regarded as an ideal system in which to study flagellar biology, swims forward by the synchronous action of its two flagella. Using high-speed imaging over long intervals, we found a richer behavior: A cell swimming in the dark stochastically switches between synchronous and asynchronous flagellar beating. Three-dimensional tracking shows that these regimes lead, respectively, to nearly straight swimming and to abrupt large reorientations, which yield a eukaryotic version of the "run-and-tumble" motion of peritrichously flagellated bacteria.

Comment in

• Microbiology. Tumbling for stealth?

  Stocker R, Durham WM. Stocker R, et al. Science. 2009 Jul 24;325(5939):400-2. doi: 10.1126/science.1177269. Science. 2009. PMID: 19628846 No abstract available.

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