Rapid integumental color changes due to novel iridophores in the chameleon sand tilefish Hoplolatilus chlupatyi

Summary The wavelength of the light reflected from iridophores depends on the thickness and the spacing of intracellular reflecting platelets. Here, we show that the rapid color change from blue to red of the chameleon sand tilefish Hoplolatilus chlupatyi is mediated by adrenergic stimulation of a n...

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Bibliographic Details
Published in:Pigment cell and melanoma research 2017-05, Vol.30 (3), p.368-371
Main Author: Goda, Makoto
Format: Article
Language:English
Subjects:
Adrenal glands
Animal Scales - physiology
Animal Scales - ultrastructure
Animals
chameleon sand tilefish
chromatophore
Chromatophores - metabolism
Chromatophores - ultrastructure
Color
Fishes - physiology
iridophore
Norepinephrine
Phentolamine
pigment cell
Platelets
Sand
Scales
Skin Pigmentation - physiology
Stimulation
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Summary:Summary The wavelength of the light reflected from iridophores depends on the thickness and the spacing of intracellular reflecting platelets. Here, we show that the rapid color change from blue to red of the chameleon sand tilefish Hoplolatilus chlupatyi is mediated by adrenergic stimulation of a novel type of iridophore in which reflecting platelets are concentrated selectively in the periphery of the cell, near the plasma membrane. The color changes are not only observed in vivo but also in pigment cells of isolated scales which respond to increases in K+ ion concentrations in 0.5 s and to addition of norepinephrine within 1 s. The norepinephrine effect can be blocked by addition of the alpha‐adrenergic antagonist phentolamine. The results suggest that adrenergic stimulation leads to changes in reflecting platelet organization in Hoplolatilus chlupatyi iridophores and represents the major mediator of the rapid color change in this fish in vivo.
ISSN:1755-1471
1755-148X
DOI:10.1111/pcmr.12581