Motility and self-organization of gliding 
<i>Chlamydomonas</i>
 populations

Till, Sebastian; Ebmeier, Florian; Fragkopoulos, Alexandros; Mazza, Marco G.; Bäumchen, Oliver

doi:10.1103/physrevresearch.4.l042046

Cited by 7 publications

(4 citation statements)

References 39 publications

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“…Indeed, after several stimuli, most of the algae stick to the wells, a likely effect of light stimulation. 31,32 These stuck algae move very slowly by gliding, 33 see Fig. S8 (ESI †).…”

Section: Effect Of Historymentioning

confidence: 99%

Short-term memory effects in the phototactic behavior of microalgae

Laroussi,

Jarrahi,

Amselem

2024

Soft Matter

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“…Indeed, after several stimuli, most of the algae stick to the wells, a likely effect of light stimulation. 31,32 These stuck algae move very slowly by gliding, 33 see Fig. S8 (ESI †).…”

Section: Effect Of Historymentioning

confidence: 99%

Short-term memory effects in the phototactic behavior of microalgae

Laroussi,

Jarrahi,

Amselem

2024

Soft Matter

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“…We designate the algae in the adhered state as 'immotile' although they retain slow gliding motility. [26,27] When the local illumination was terminated, the cells desorbed and transitioned into the motile state (Figure 3). Figure 4 shows the equalization of the microswimmer number density in two compartments of Sample E (parallel elongated pillars) after the illumination was removed.…”

Section: Equilibration Kineticsmentioning

confidence: 99%

Permeation Dynamics of Active Swimmers Through Anisotropic Porous Walls

von Rüling,

Bakhchova,

Steinmann

et al. 2023

Advanced Physics Research

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Natural habitats of most living microorganisms are distinguished by a complex structure often formed by a porous medium such as soil. The dynamics and transport properties of motile microorganisms are strongly affected by crowded and locally anisotropic environments. Using Chlamydomonas reinhardtii as a model system, we explore the permeation of active colloids through a structured wall of obstacles by tracking microswimmers' trajectories and analyzing their statistical properties. Employing micro‐labyrinths formed by cylindrical or elongated pillars, we demonstrate that the anisotropy of the pillar's form and orientation strongly affects the microswimmers' dynamics on different time scales. Furthermore, we discuss the kinetics of the microswimmer exchange between two compartments separated by an array of pillars.

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“…In contrast, physical approaches such as motility analysis, while extensively studied at ambient temperatures [ 40 , 41 , 42 ], have, to the best of our knowledge, only been conducted at temperatures as low as 15 °C [ 43 ]. This is thought to be due to the substantial stress placed on the cells at lower temperatures, making long-term physiological studies challenging.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Unique Motility of the Unicellular Green Alga Chlamydomonas reinhardtii at Low Temperatures down to −8 °C

Yamashita,

Yamaguchi,

Ikeno

et al. 2024

Micromachines

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Previous studies of motility at low temperatures in Chlamydomonas reinhardtii have been conducted at temperatures of up to 15 °C. In this study, we report that C. reinhardtii exhibits unique motility at a lower temperature range (−8.7 to 1.7 °C). Cell motility was recorded using four low-cost, easy-to-operate observation systems. Fast Fourier transform (FFT) analysis at room temperature (20–27 °C) showed that the main peak frequency of oscillations ranged from 44 to 61 Hz, which is consistent with the 60 Hz beat frequency of flagella. At lower temperatures, swimming velocity decreased with decreasing temperature. The results of the FFT analysis showed that the major peak shifted to the 5–18 Hz range, suggesting that the flagellar beat frequency was decreasing. The FFT spectra had distinct major peaks in both temperature ranges, indicating that the oscillations were regular. This was not affected by the wavelength of the observation light source (white, red, green or blue LED) or the environmental spatial scale of the cells. In contrast, cells in a highly viscous (3.5 mPa·s) culture at room temperature showed numerous peaks in the 0–200 Hz frequency band, indicating that the oscillations were irregular. These findings contribute to a better understanding of motility under lower-temperature conditions in C. reinhardtii.

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Motility and self-organization of gliding Chlamydomonas populations

Cited by 7 publications

References 39 publications

Short-term memory effects in the phototactic behavior of microalgae

Short-term memory effects in the phototactic behavior of microalgae

Permeation Dynamics of Active Swimmers Through Anisotropic Porous Walls

Analysis of Unique Motility of the Unicellular Green Alga Chlamydomonas reinhardtii at Low Temperatures down to −8 °C

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