THE CONTROL OF RETINAL PIGMENT MIGRATION IN LEANDER SERRATUS
| Autor: | Francis G. W. Knowles |
|---|---|
| Rok vydání: | 1950 |
| Předmět: |
Retina
genetic structures Pigment cells Retinal Anatomy Constant darkness Biology chemistry.chemical_compound Pigment medicine.anatomical_structure chemistry visual_art Darkness Pigment migration medicine visual_art.visual_art_medium Humans sense organs Circadian rhythm General Agricultural and Biological Sciences Retinal Pigments |
| Zdroj: | The Biological Bulletin. 98:66-80 |
| ISSN: | 1939-8697 0006-3185 |
| DOI: | 10.2307/1538600 |
| Popis: | 1. The distal and the proximal retinal pigments of Leander serratus can alter their positions in response to light and darkness.2. The reflecting pigment shows a great movement at night which persists as a diurnal rhythm in continued darkness, but during the day it is unaffected by change of illumination.3. The extent of distal pigment migration depends on the shade of the background on which the animal is placed, if the intensity of incident illumination is constant.4. In constant darkness the proximal pigment continues to migrate diurnally for some days, at least. At midnight it shows a greater degree of dark-adaption than it does during the day; the distal pigment cells do not exhibit any detectable persisting diurnal rhythm in continued darkness.5. After removal of the sinus-gland the distal pigment, in most of the operated animals, attained the position of maximal dark-adaption and was unaffected by change of illumination; it therefore appears not to respond directly to illumination. On the other han... |
| Databáze: | OpenAIRE |
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