Bilateral enucleation immediately and irreversibly cancels the skin camouflage reactions of Ambystoma larvae. A heteroplastic eye transplant can reinstate the latter reaction. Recipients of a heteroplastic eye recovered the reaction as frequently and to the same extent as animals with one of their own eyes reattached.
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http://dx.doi.org/10.1159/000116563 | DOI Listing |
Sci Rep
December 2024
Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, 02115, USA.
Cephalopods produce dynamic colors and skin patterns for communication and camouflage via stratified networks of neuronally actuated yellow, red, and brown chromatophore organs, each filled with thousands of pigment granules. While compositional analysis of chromatophore granules in Doryteuthis pealeii reveals the pigments as ommochromes, the ultrastructural features of the granules and their effects on bulk coloration have not been explored. To investigate this, we isolated granules from specific colored chromatophores and imaged them using multiple modalities.
View Article and Find Full Text PDFAnimals (Basel)
December 2024
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610213, China.
Background color matching is essential for camouflage and thermoregulation in ectothermic vertebrates, yet several key cellular-level questions remain unresolved. For instance, it is unclear whether the number of chromatophores or the activity of individual chromatophores plays a more critical role in this process. Using single-cell RNA sequencing (scRNA-seq), we investigated the cellular and molecular mechanisms underlying color change in , which adapted to its background by displaying light-green skin on white and black skin on black within two days.
View Article and Find Full Text PDFBiofabrication
December 2024
The M.O.E. Key Laboratory of Laboratory Medical Diagnostics, The College of Laboratory Medicine, Chongqing Medical University, #1 Yixueyuan Road, Yuzhong District, Chongqing 400016, People's Republic of China.
Proc Natl Acad Sci U S A
November 2024
Department of Biological Sciences, Walla Walla University, College Place, WA 99324.
For many animals, color change is a critical adaptive mechanism believed to carry a substantial energetic cost. Yet, no study to date has directly measured the energy expenditure associated with this process. We examined the metabolic cost of color change in octopuses by measuring oxygen consumption in samples of excised octopus skin during periods of chromatophore expansion and contraction and then modeled metabolic demand over the whole octopus as a function of octopus mass.
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