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Phototaxis in monochromatic light and microspectrophotometry of the cerebral eye of the rotifer Brachionus calyciflorus

  • Annie Cornillac
  • Elizabeth Wurdak
  • Pierre Clément
Conference paper
Part of the Developments in Hydrobiology book series (DIHY, volume 14)

Abstract

The observed wavelength-dependent variations in the phototaxis of the rotifer Brachionus calyciflorus inform us only partially about the spectral characteristics of the sensory pigment of the eye, since these variations are also linked to the absorption spectrum of the accessory pigment(s).
  • The absence of phototaxis between 420 nm and 500 nm is due to the lack of sensitivity of the sensory pigments at these wavelenghts.

  • The absence of respose between 650 nm and 700 nm is due to a drop in the absorbance of the accesssory pigments, which consequently no longer play a screening role at these wavelengths.

  • The existence of oriented responses between 350 nm and 420 nm and between 500 nm and 650 nmm, is due to the joint intervention of the two types of pigments at these wavelengths.

Keywords

rotifers Brachionus calyciflorus Phototaxis sensory pigment accessory pigment microspectrophotometry absorption spectrum spectral sensitivity Abstract 

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Copyright information

© Dr W. Junk Publishers, The Hague 1983

Authors and Affiliations

  • Annie Cornillac
  • Elizabeth Wurdak
  • Pierre Clément
    • 1
  1. 1.Laboratoire d’Histologie et Biologie Tissulaire, CNRS: 244 and RCP 657Université Lyon IVilleurbanneFrance

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