Evolution of digestion of carbohydrates in the separate parts of the digestive tract of the edible snail Helix lucorum (Gastropoda: Pulmonata: Stylommatophora) during a complete 24-hour cycle and the first days of starvation
| Autor: | V. Flari, M. Lazaridou-Dimitriadou |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Aging
Sucrose Cellobiose Physiology Carbohydrase Lactose Snail Disaccharides Biochemistry Pulmonata Salivary Glands Endocrinology Cellulase Digestive System Physiological Phenomena Polysaccharides biology.animal Gastropoda medicine Animals Maltose Ecology Evolution Behavior and Systematics Starvation chemistry.chemical_classification biology Ecology Helix Snails Proteins biology.organism_classification Helix lucorum Biological Evolution Enzyme chemistry biology.protein Carbohydrate Metabolism Digestion Animal Science and Zoology medicine.symptom Food Deprivation |
| Zdroj: | Journal of Comparative Physiology B. 165:580-591 |
| ISSN: | 1432-136X 0174-1578 |
| DOI: | 10.1007/bf00387520 |
| Popis: | In the present study we examined carbohydrase activities during a complete 24-h cycle and during the first days of starvation in both adult and juvenile snails. The results indicated the predominant role of the digestive gland in the secretions of the enzymes responsible for degradation of most of the carbohydrates tested. Salivary glands secreted some digestive enzymes but in amounts lower than secreted by the digestive gland. Enzymatic activities fluctuated during the first hours of digestion and also after the digestive tract was empty. The relatively high enzymatic activities recorded 24 h after the intake of food and during starvation could be due to the circadian rhythm of this species and/or to the participation of an existing microflora in the digestive tract of Helix lucorum. The double origin (exogenous and endogenous) of some digestive enzymes such as cellulases is discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink