Histochemical (polysaccharides, proteins, nucleic acids and enzymes) and autoradiographic (incorporation of 35S labelled sodium sulfate) study of the epithelial intestinal cells of Xenodon merremiiWagler, 1824 (Ophidia)

The digestive tract of the tortoise Testudo graeca (Testudines) was investigated by means of light and electron microscopy. The esophagus of T. graeca was lined by two types of epithelium: non-keratinized stratified squamous in the upper portion and stratified columnar in the lower. The lamina propria of the esophagus contained tubular or tubuloacinar glands. The mucosa of the stomach showed similar characteristics to those of other reptiles. The small intestine exhibited longitudinal folds lined by absorptive and goblet cells. The large intestine was lined by columnar mucous cells. Within the lamina propria of the large intestine, masses of 10-15 epithelial cells connecting with the surface epithelium by means of slender cytoplasmic processes were observed. A battery of six lectins (Con-A, PNA, WGA, DBA, SBA, and LTA) was used to identify the epithelial mucins. WGA and DBA reacted with all types of mucous cells throughout the alimentary canal. PNA was only unreactive in the intestine, LTA in the esophagus, and SBA in the large intestine. These results indicate a similar lectin-binding pattern throughout the gut of T. graeca.

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Histochemical and ultrastructural study of the digestive tract of the tortoise Testudo graeca (Testudines)

Pérez‐Tomás

Ballesta

Madrid

et al. 1990

Journal of Morphology

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Distribution of mucins in the mucosa of the digestive tract of reptiles: a histochemical study

et al. 1989

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Histochemical (polysaccharides, proteins, nucleic acids and enzymes) and autoradiographic (incorporation of 35S labelled sodium sulfate) study of the epithelial intestinal cells of Xenodon merremiiWagler, 1824 (Ophidia)

Cited by 2 publications

References 19 publications

Histochemical and ultrastructural study of the digestive tract of the tortoise Testudo graeca (Testudines)

Histochemical and ultrastructural study of the digestive tract of the tortoise Testudo graeca (Testudines)

Distribution of mucins in the mucosa of the digestive tract of reptiles: a histochemical study

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