Activity and Oxidative Metabolism of the Land Snail Helix aspersa
| Autor: | Jean E. Vorhaben, James W. Campbell, Alan V. Klotz |
|---|---|
| Rok vydání: | 1984 |
| Předmět: |
photoperiodism
chemistry.chemical_classification Physiology chemistry.chemical_element Mitochondrion Biology biology.organism_classification Oxygen Endocrinology Enzyme Biochemistry chemistry Physiology (medical) Aestivation biology.protein Cytochrome c oxidase Animal Science and Zoology Glycolysis Hepatopancreas |
| Zdroj: | Physiological Zoology. 57:357-365 |
| ISSN: | 0031-935X |
| DOI: | 10.1086/physzool.57.3.30163725 |
| Popis: | In the laboratory, Helix aspersa show three discernible activity phases: an actively foraging and feeding phase that occurs during the dark of a 14L:10D photoperiod, a torpid phase that occurs during the light, and a long-term dormant phase ("aestivation") that may last for several weeks. These phases are characterized by changes in the rate of oxygen consumption. During the daily torpid phase, oxygen consumption is reduced to 50%-60% of the maximum seen during activity. During the long-term dormant phase, oxygen consumption is further reduced to about 20% or less than maximum. The oxidation of succinate and D-mannitol by intact hepatopancreatic mitochondria does not change during the daily cycle. There is a small percentage decrease in succinate oxidation by these mitochondria during aestivation, but this may be of limited significance metabolically. Some key enzymes of glycolysis and cytochrome oxidase also showed small decreases. Of the enzymes measured in hepatopancreas tissue, only the soluble aminot... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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