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Journal of Cell Science, Vol 41, Issue 1 65-74, Copyright © 1980 by Company of Biologists

JOURNAL ARTICLES

Light-induced pigment aggregation in cultured fish melanophores: spectral sensitivity and inhibitory effects of theophylline and cyclic adenosine-3',5'-monophosphate

Y Wakamatsu, S Kawamura and T Yoshizawa

About 20% of xiphophorin fish (Xiphophorus maculatus) dermal melanophores which were cultured in monolayer for 5 to 10 days responded to light directly, exhibiting reversible melanosome aggregation within a few minutes. In order to determine the spectral sensitivity for the light-response, absorbance changes due to the light-induced melanosome aggregation were measured on single melanophores in a range of wavelengths from 370 to 550 nm using a recording microspectrophotometer. The melanophores showed maximum sensitivity to a wavelength of about 410 nm and very little to those longer than 500 nm. 10(-4) to 10(-2) M theophylline and 10(-4) M cAMP had inhibitory effects on the light-response.


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© The Company of Biologists Ltd 1980