File:Colour change and iridophore types in panther chameleons.png
Colour_change_and_iridophore_types_in_panther_chameleons.png (511 × 543 pixels, file size: 502 KB, MIME type: image/png)
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Summary
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| Description |
English: Colour change and iridophore (kind of chromatophore) types in panther chameleons: these animals can rapidly change colour by modifying nanocrystals of guanine in iridophores in layers of their skin.
Captions: (a) Reversible colour change is shown for two males (m1 and m2): during excitation (white arrows), background skin shifts from the baseline state (green) to yellow/orange and both vertical bars and horizontal mid-body stripe shift from blue to whitish (m1). Some animals (m2) have their blue vertical bars covered by red pigment cells. (b) Red dots: time evolution in the CIE chromaticity chart of a third male with green skin in a high-resolution video; dashed white line: optical response in numerical simulations using a face-centred cubic (FCC) lattice of guanine crystals with lattice parameter indicated with black arrows. (c) Haematoxylin and eosin staining of a cross-section of white skin showing the epidermis (ep) and the two thick layers of iridophores. (d) TEM images of guanine nanocrystals in S-iridophores in the excited state and three-dimensional model of an FCC lattice (shown in two orientations). (e) TEM image of guanine nanocrystals in D-iridophores. Scale bars, 20 mm ( c); 200 nm (d,e). |
| Date | |
| Source | https://www.nature.com/articles/ncomms7368.pdf?origin=ppub |
| Author | Jeremie Teyssier, Suzanne V. Saenko, Dirk van der Marel, Michel C. Milinkovitch |
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