Related Experiment Video
Updated: May 5, 2026

Observation of Photobehavior in Chlamydomonas reinhardtii
Published on: May 6, 2022
Wavelength dependence of photomovement in desmids
1Fachbereich Biologie-Botanik der Universität Marburg, Lahnberge, D-3550, Marburg, Federal Republic of Germany.
Abstract:
The action spectra of phototaxis, photokinesis, and photophobic response of Cosmarium cucumis, C. botrytis, C. margaritiferum, and Micrasterias denticulata show peaks in the blue (about 440 nm) and red (about 670 nm) spectral regions and thus indicate the involvement of photosynthetic pigments. According to the differences in the action spectra, light-induced movement responses may be linked with photosynthesis in different ways. Results with population methods have been supported by time-lapse microcinematography.
Related Concept Videos
The de Broglie Wavelength
Photoreceptors and Plant Responses to Light
Biological Clocks and Seasonal Responses
Chromatographic Resolution
The effectiveness of separation can be evaluated by determining the level of separation between two neighboring peaks in a chromatogram, which represents the individual components of a sample.
In chromatography,...
Light as Energy
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...

