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Phototaxis of Desmids and Diatoms

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Logo of IWF (Göttingen)IWF (Göttingen)
 Wenderoth, Klaus

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Title
Phototaxis of Desmids and Diatoms
Alternative Title
Phototaxis bei Desmidiaceen und Diatomeen
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CC Attribution - NonCommercial - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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IWF SignatureC 1496
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Other Version
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Production Year1981

Technical Metadata

IWF Technical DataFilm, 16 mm, LT, 159 m ; F, 14 1/2 min

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Abstract
Desmids move towards light: positive phototaxis with Micrasterias, tested with white, red and blue light; light fields of varying size and intensity. Mass response demonstrated with Cosmarium. Diatoms reach a more illuminated environment by modifying their reversal rhythm ("shunting movement"). Positive phototaxis (capillary experiment) and negative phototaxis demonstrated with Navicula peregrina. Safety light: 537 nm. Time-lapse.
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