Phosphate Uptake by Phosphate-Starved Euglena
Phosphate-deprived Euglena acquire the ability to rapidly in-corporate added phosphate and, also, synthesize an induced acid phosphatase localized in the pellicle. The phosphate uptake system is saturated at low concentrations of phosphate and is inhibited by dinitrophenol, by low temperature, by K+...
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| Format: | Online |
| Language: | English |
| Published: |
The Rockefeller University Press
1966
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3328317/ |
| Summary: | Phosphate-deprived Euglena acquire the ability to rapidly in-corporate
added phosphate and, also, synthesize an induced acid phosphatase localized in the
pellicle. The phosphate uptake system is saturated at low concentrations of phosphate and
is inhibited by dinitrophenol, by low temperature, by K+,
Li+, and Na+ ions, and competitively by arsenate.
The orthophosphate incorporated into the cell is rapidly converted into organic forms but
enough remains unesterified to suggest that the uptake is an active transport process. The
data do not rule out the possibility that the induced phosphatase is involved in the
transport process. |
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