| Autor: |
Kasschau, Margaret R., Skisak, Christopher M., Cook, J. Philip, Mills, W. Ronald |
| Zdroj: |
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology; March 1984, Vol. 154 Issue: 2 p181-186, 6p |
| Abstrakt: |
During high salinity stress, ß-alanine accumulates to high levels in the sea anemone,Bunodosoma cavernata. Following a salinity increase from 26‰ to 40‰ ß-alanine increased 28-fold from 1.5 to 41.9 µmoles/g dry weight. Both whole animal studies and experiments with cell free homogenates indicate that under high salinity conditions an increase in the rate of ß-alanine synthesis from aspartic acid as well as a decrease in the rate of ß-alanine oxidation are responsible for the observed accumulation of ß-alanine. The rate of aspartic acid decarboxylation to ß-alanine is about 3 times greater in anemones acclimated to 40‰ than for those in normal salinity water (26‰). ß-alanine oxidation to CO2 and acetyl-CoA proceeds 2.5 to 3 times slower in high salinity adaptedB. cavernata than in those acclimated to normal salinity. There is always a rapid degradation of uracil to ß-alanine, but this does not change with salinity. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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