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Microbial Mats pp 183-191 | Cite as

Motility of Microcoleus chthonoplastes subjected to different light intensities quantified by digital image analysis

  • Niels B. Ramsing
  • Lee Prufert-Bebout
Part of the NATO ASI Series book series (volume 35)

Abstract

Light dependent movement of gliding cyanobacteria has been studied for more than a hundred years and several types of response to light have been observed (Häder 1987). The following concepts have been recommended by an ad hoc committee on behavioral terminology, (Diehn et al. 1979): Phototaxis: Orientation of movement with respect to a directional light field; photokinesis: by which the steady-state speed of movement is related to the total light intensity and a photophobic response: where the movement is altered by a spatial or temporal change in light intensity. Most photosynthetic organisms display one or more of these behaviours in their search of suitable light conditions (Castenholz 1982).

Keywords

Light Intensity Digital Image Analysis Total Movement White Pixel Scalar Irradiance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Niels B. Ramsing
    • 1
  • Lee Prufert-Bebout
    • 1
  1. 1.Max-Planck Institute for Marine MicrobiologyBremenGermany

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