Results 131 to 140 of about 1,094 (155)

Organellogenesis of the cephalopod iridophore: Cytomembranes in development

Journal of Ultrastructure Research, 1967
The iridophore of the cephalopod iris and skin develop by the concurrent fusion of Golgi-derived vesicles, to form new cell surface, and by the condensation of ribosome-sized granules, to form dense membrane-bound iridosomal platelets. Microtubules parallel the platelets in their formation and appear to be important in either alignment or transport of ...
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Cephalopod coloration model I Squid chromatophores and iridophores

Journal of the Optical Society of America A, 2008
We have developed a mathematical model of skin coloration in cephalopods, a class of aquatic animals. Cephalopods utilize neurological and physiological control of various skin components to achieve active camouflage and communication. Specific physical processes of this coloration are identified and modeled, utilizing available biological materials ...
Richard L, Sutherland, Lydia M, Mäthger, Roger T, Hanlon, Augustine M, Urbas, Morley O, Stone   +4 more
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Leucophores and iridophores of Fundulus heteroclitus: Biophysical and ultrastructural properties

Journal of Morphology, 1979
AbstractClassical light microscopic studies on pigmentation of Fundulus heteroclitus (killifish) indicated that there are three groups of light reflecting cells; one group on the surface of scales reflects white light, while two other deeper groups (the melaniridophores and the stratum argenteum) are iridescent. The results presented here show that: (1)
David G, Menter, M, Obika, T T, Tchen, John D, Taylor   +3 more
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Polarization Reflecting Iridophores in the Arms of the SquidLoligo pealeii

The Biological Bulletin, 2001
85: 1185–1196. 12. Yang, X.-L., L. Ping, T. Lu, Y. Shen, and M.-H. Han. 2001. Prog. Brain Res. 131: 277–293. 13. Schmidt, K.-F. 1999. Neurosci. Lett. 262: 109–112. 14. Shen, Y., and X.-L. Yang. 1999. Neurosci. Lett. 259: 177–180. 15. McMahon, D. G., D.-Q. Shang, L. Ponomareva, and T. Wagner. 2001. Prog. Brain Res. 131: 419–436. 16. Dowling, J.
N, Shashar, D T, Borst, S A, Ament, W M, Saidel, R M, Smolowitz, R T, Hanlon   +5 more
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The Iridophores of the Echinoid Diadema antillarum

Journal of Cell Science, 1961
ABSTRACT The blue pattern seen when the skin of Diadema antillarum is viewed by reflected light is due to iridophores. The quality of their blueness varies with the background provided by neighbouring chromatophores. Microdissection reveals that they consist of gelatinous plates contained in a fibrous and cellular capsule.
Norman Millott, Brenda M. Manly
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ACTION SPECTRA FOR THE IRIDOPHORE LIGHT RESPONSE IN THE NEON TETRA

Photochemistry and Photobiology, 1984
Abstract The iridophores of some fishes such as the neon tetra (Paracheirodon innesi) are composed of alternating layers of guanine and cytoplasm. In the dark adapted state, the guanine layers are close together and reflect violet light. After illumination these layers separate and the iridophores reflect green light.
J. N. Lythgoe, Julia Shand
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Zebrafish Leucocyte tyrosine kinase controls iridophore establishment, proliferation and survival

Pigment Cell & Melanoma Research, 2016
Summary The zebrafish striped pattern results from the interplay among three pigment cell types; black melanophores, yellow xanthophores and silvery iridophores, making it a valuable model to study pattern formation in vivo.
Fadeev, A., Krauss, J., Singh, A., Nüsslein-Volhard, C.   +3 more
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Neural Control of Motile Activity of Light‐Sensitive Iridophores in the Neon Tetra

Pigment Cell Research, 1989
Experiments with skin pieces revealed that the sympathetic nervous system controls the activity of the light‐sensitive iridophores in the stripes of the neon tetra. The spectral peak reflected from the cells was shifted toward longer wavelengths as a result of a direct interaction between norepinephrine and alpha‐adrenoceptors present on the cell ...
H, Nagaishi, N, Oshima
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Study of the motile mechanism in neon tetra (Paracheirodon innesi) iridophores

Comparative Biochemistry and Physiology Part A: Physiology, 1992
Abstract 1. 1. Using the preparations of lateral stripe skin, the motile mechanism of the neon tetra ( Paracheirodon innesi ) iridophores was studied. 2. 2. Colchicine and vinblastine, antimitotic reagents, inhibited the iridophore response to norepinephrine (NE) reversibly. 3. 3.
Noriko Oshima, Hiroshi Nagaishi
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Effects of ACTH on melanophores and iridophores isolated from bullfrog tadpoles

General and Comparative Endocrinology, 1973
Melanophores and iridophores were isolated from bullfrog tadpoles by the methods of trypsin digestion and Ficoll density-gradient centrifugation and cultured in vitro in collagen-coated plastic dishes. Both chromatophores attached to the dish and formed dendritic structures.
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