Document Detail


Motion vision is independent of color in Drosophila.
MedLine Citation:
PMID:  18353989     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Whether motion vision uses color contrast is a controversial issue that has been investigated in several species, from insects to humans. We used Drosophila to answer this question, monitoring the optomotor response to moving color stimuli in WT and genetic variants. In the fly eye, a motion channel (outer photoreceptors R1-R6) and a color channel (inner photoreceptors R7 and R8) have been distinguished. With moving bars of alternating colors and high color contrast, a brightness ratio of the two colors can be found, at which the optomotor response is largely missing (point of equiluminance). Under these conditions, mutant flies lacking functional rhodopsin in R1-R6 cells do not respond at all. Furthermore, genetically eliminating the function of photoreceptors R7 and R8 neither alters the strength of the optomotor response nor shifts the point of equiluminance. We conclude that the color channel (R7/R8) does not contribute to motion detection as monitored by the optomotor response.
Authors:
Satoko Yamaguchi; Reinhard Wolf; Claude Desplan; Martin Heisenberg
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2008-03-19
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  105     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-03-26     Completed Date:  2008-04-22     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4910-5     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Blindness
Color
Contrast Sensitivity
Drosophila melanogaster / cytology,  physiology*
Motion*
Mutation / genetics
Photoreceptor Cells, Invertebrate / cytology
Vision, Ocular*
Grant Support
ID/Acronym/Agency:
EY13012/EY/NEI NIH HHS; R01 EY013012/EY/NEI NIH HHS; R01 EY017916/EY/NEI NIH HHS; R01 EY017916-03/EY/NEI NIH HHS
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