Adaptive changes in the epidermal structure of the heat-acclimated rock pigeon (Columba livia): A comparative electron microscopy study

Journal of Morphology
Liisa PeltonenJacob Marder

Abstract

The purpose of this study was to find out whether the microstructure of the highly permeable skin of heat-acclimated pigeons allowing increased evaporative cooling differs from the skin of pigeons in the non-acclimated or cold-acclimated state. In addition, the correlation between epidermal morphology and cutaneous water evaporation in heat-acclimated pigeons was elucidated. The epidermis of heat-acclimated pigeons differs in several respects from the epidermis of non-acclimated or cold-acclimated birds. Both the dorsal and the abdominal skin include modified areas, characterized by increased vascularization, epidermis with greater thickness, and changes in intracellular structures. Greater thickness results from hypertrophy of epidermal cells possibly due to greater fluid content of the sebokeratinocytes in the germinative layers. The stratum corneum includes corneocytes with thickened cornified envelopes and contains greater mass of keratin-complex material compared to non-acclimated and cold-acclimated pigeons. The extracellular space between the compactly piled corneocytes contains amorphous lipoid material. The multigranular bodies lack compact organization of lipid bilayers. The transitional layer in the heat-acclimated p...Continue Reading

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Citations

Oct 30, 1998·Journal of Basic and Clinical Physiology and Pharmacology·Y Arieli, J Marder
Jun 22, 2011·Integrative and Comparative Biology·Justin G BoylesAndrew E McKechnie
Apr 7, 2005·Cells, Tissues, Organs·Lorenzo Alibardi, Mattia Toni
Jan 29, 2011·The Journal of Experimental Biology·Liisa M Peltonen, Satu Sankari
Sep 20, 2005·The Journal of Experimental Biology·Agustí Muñoz-Garcia, Joseph B Williams
Dec 12, 2003·The Journal of Experimental Biology·Andrew E McKechnie, Blair O Wolf
Feb 28, 2002·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Yehuda ArieliEshel Ophir
Apr 26, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·E OphirJ Marder
Dec 15, 2004·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Eshel OphirJacob Marder

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