Cellular Phosphorus Changes under Low-Carbon Stress

Using a defined glucose-salts medium, phosphorus changes in Escherichia coli were monitored using ^{32}{\rm P}$. The major part of this work was carried out under carbon-limited conditions to simulate activated sludge treatment. Both phosphorus-rich and phosphorus-deficient cells were used. It was f...

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Bibliographic Details
Published in:Journal - Water Pollution Control Federation 1973-01, Vol.45 (1), p.85-96
Main Authors: Hopson, N. E., Sack, W. A.
Format: Article
Language:English
Subjects:
Activated sludge
Carbon
Cell growth
Escherichia coli - growth & development
Glucose - metabolism
Nucleic acids
Phosphates
Phosphorus
Phosphorus - metabolism
Phosphorus acids
Polyphosphates
Wastewater
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Summary:Using a defined glucose-salts medium, phosphorus changes in Escherichia coli were monitored using ^{32}{\rm P}$. The major part of this work was carried out under carbon-limited conditions to simulate activated sludge treatment. Both phosphorus-rich and phosphorus-deficient cells were used. It was found that phosphorus will be taken up under nonproliferating conditions as a direct function of the rate of carbon addition. When phosphorus-rich cells were grown under low carbon loadings, the per-cell content of phospohrus dropped in proportion to the amount of cellular division. The maximum phosphorus levels attained were 4.0 percent during log-growth conditions, 3.0 percent during inorganic ion limitation, and 3.25 percent during the carbon-limited experiments.
ISSN:0043-1303