Publication details.

Paper

Year:2019
Author(s):Jorge Arrieta, Marco Polin, Ramón Saleta-Piersanti, Idan Tuval
Title:Light control of localized photo-bioconvection
Journal:PHYSICAL REVIEW LETTERS
ISSN:0031-9007
Volume:123
Pages:158101
D.O.I.:https://doi.org/10.1103/PhysRevLett.123.158101
Web:https://journals.aps.org/prl/accepted/3c079Ya6Od31f86ac1aa1db134da739ec5c74e882
Abstract:
Microorganismal motility is often characterised by complex responses to environmental physico- chemical stimuli. Although the biological basis of these responses is often not well understood, their exploitation already promises novel avenues to directly control the motion of living active matter at both the individual and collective level. Here we leverage the phototactic ability of the model microalga Chlamydomonas reinhardtii to precisely control the timing and position of localised cell photo-accumulation, leading to the controlled development of isolated bioconvective plumes. This novel form of photo-bio-convection allows a precise, fast and reconfigurable control of the spatio-temporal dynamics of the instability and the ensuing global recirculation, which can be activated and stopped in real time. A simple continuum model accounts for the phototactic response of the suspension and demonstrates how the spatio-temporal dynamics of the illumination field can be used as a simple external switch to produce efficient bio-mixing.

Related staff

  • Idan Tuval Gefen
  • Jorge Arrieta Sanagustin
  • Related departments

  • Marine Ecology
  • Related projects

  • SifoMED CTA 050
  • INTERDIBIO
  • Related research groups

  • Marine Ecosystems Dynamics