ISSN:
1573-0972
Keywords:
Phormidium laminosum
;
phosphate uptake
;
phosphorus-starved
;
photosynthesis
;
vanadate
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract Phosphorus(P)-starved cells of the cyanobacterium Phormidium laminosum have been investigated in relation to their phosphate uptake characteristics. P-deficient cells showed much higher phosphate uptake rates from ultrapure water supplemented with this anion than P-sufficient ones. After 9 days of starvation in P-free medium, the total cellular P content of P-deficient cells was approximately five times lower than that of cells grown in the presence of phosphate. Phosphate uptake by P-deficient cells occurred in both light and dark under aerobic conditions. In anaerobiosis, light was required for uptake, suggesting that the necessary energy could be derived from the respiratory electron transport chain. Phosphate uptake in P-deficient cells was sensitive to vanadate, suggesting the involvement of a plasma membrane ATPase.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018583224294
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