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The dermal chromatophore unit.
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MedLine Citation:
PMID:  5691979     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Rapid color changes of amphibians are mediated by three types of dermal chromatophores, xanthophores, iridophores, and melanophores, which comprise a morphologically and physiologically distinct structure, the dermal chromatophore unit. Xanthophores, the outermost element, are located immediately below the basal lamella. Iridophores, containing light-reflecting organelles, are found just beneath the xanthophores. Under each iridophore is found a melanophore from which processes extend upward around the iridophore. Finger-like structures project from these processes and occupy fixed spaces between the xanthophores and iridophores. When a frog darkens, melanosomes move upward from the body of the melanophore to fill the fingers which then obscure the overlying iridophore. Rapid blanching is accomplished by the evacuation of melanosomes from these fingers. Pale coloration ranging from tan to green is provided by the overlying xanthophores and iridophores. Details of chromatophore structure are presented, and the nature of the intimate contact between the chromatophore types is discussed.
Authors:
J T Bagnara; J D Taylor; M E Hadley
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of cell biology     Volume:  38     ISSN:  0021-9525     ISO Abbreviation:  J. Cell Biol.     Publication Date:  1968 Jul 
Date Detail:
Created Date:  1968-10-28     Completed Date:  1968-10-28     Revised Date:  2010-06-22    
Medline Journal Info:
Nlm Unique ID:  0375356     Medline TA:  J Cell Biol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  67-79     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Anura / anatomy & histology*
Chromatophores / cytology*
Microscopy, Electron
Skin / cytology*
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Full Text
Journal Information
Journal ID (nlm-ta): J Cell Biol
ISSN: 0021-9525
ISSN: 1540-8140
Publisher: The Rockefeller University Press
Article Information
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Copyright © 1968 by The Rockefeller University Press.
Received Day: 15 Month: 12 Year: 1967
Revision Received Day: 20 Month: 2 Year: 1968
Print publication date: Day: 1 Month: 7 Year: 1968
Volume: 38 Issue: 1
First Page: 67 Last Page: 79
ID: 2107474
PubMed Id: 5691979

THE DERMAL CHROMATOPHORE UNIT
Joseph T. Bagnara
John D. Taylor
Mac E. Hadley
From the Department of Biological Sciences, University of Arizona, Tucson, Arizona 85721


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