Structural characterization of the capybara (Hydrochaeris hydrochaeris) tongue by light, scanning, and transmission electron microscopy

Autor(es)

Watanabe, Ii-Sei ^{[1, 2]} ; Dos Santos Haemmerle, Carlos Alexandre ^[2] ; Dias, Fernando Jose ^{[2, 3]} ; Cury, Diego Pulzatto ^[1] ; Pereira Da Silva, Marcelo Cavenaghi ^[4] ; Kronka Sosthines, Marcia Consentino ; Dos Santos, Tatiana Carlesco ^[5] ; Guimaraes, Juliana Placido ^[1] ; Miglino, Maria Angelica ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Vet Med & Anim Sci, Dept Surg, BR-05508 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Biomed Sci, Dept Anat, BR-05508 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Fac Dent Ribeirao Preto, Dept Morphol, BR-05508 Sao Paulo - Brazil

^[4] Univ Fed Sao Paulo, Dept Morphol & Genet, Sao Paulo - Brazil

^[5] Univ Maringa, Dept Anim Sci, Maringa, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MICROSCOPY RESEARCH AND TECHNIQUE; v. 76, n. 2, p. 141-155, FEB 2013.
• Citações Web of Science: 7

Resumo

Capybara is the largest rodent in the world and displays a seasonally dependent herbivore feeding behavior. Here, we present an anatomical contribution for understand this fact, by light, scanning, and transmission electron microscopy methodologies for tongue tissue analysis. The histological preparations revealed filiform, fungiform, vallate, and foliate papillae on the dorsal mucosa of the capybara tongue. The epithelial layer exhibited a lining of keratinized stratified squamous epithelial cells. The lamina propria was characterized by a dense connective tissue composed of the primary and secondary papillar projections. We also revealed the original aspects of the connective papillae. The shapes of the papillae varied by region of the tongue, and filiform, fungiform, vallate, and foliate papillae and subjacent layers of muscular fibers were observed. Pyriform taste buds occupying the epithelial layer of fungiform, vallate and foliate papillae were identified and the intracellular components of the taste buds and the intracorpuscular amyelinated nerve fibers were observed. The taste buds were characterized by the distribution of granular endoplasmic reticulum throughout the perinuclear area, the Golgi apparatus, and mitochondrial assemblies of various distinct diameters. Mitochondrial accumulation was also observed in the collagen bundle-surrounded amyelinated nerve fibers beside the basal cells. Therefore, these peculiar anatomical descriptions may contribute to understanding the adaptation of the feeding behavior of capybaras in a seasonally changing environment. Microsc. Res. Tech., 2013. (C) 2012 Wiley Periodicals, Inc. (AU)

• Processo FAPESP: 08/55824-0 - Estudo comparativo das caracteristicas morfologicas das papilas linguais de mamiferos silvestres (capivara, cateto e queixada), empregando os metodos de microscopia eletronica.
• Beneficiário: Ii-Sei Watanabe
• Modalidade de apoio: Auxílio à Pesquisa - Regular