Abstract
Cells of the cyanobacterium Anabaena variabilis starved for phosphate for 3 days took up phosphate at about 100 times the rate of unstarved cells. Kinetic data suggested that a new transport system had been induced by starvation for phosphate. The inducible phosphate transport system was quickly repressed by addition of Pi. Phosphate-starved cells were more sensitive to the toxic effects of arsenate than were unstarved cells, but phosphate could alleviate some of the toxicity. Arsenate was a noncompetitive inhibitor of phosphate transport; however, the apparent Ki values were high, particularly for phosphate-replete cells. Preincubation of phosphate-starved cells with arsenate caused subsequent inhibition of phosphate transport, suggesting that intracellular arsenate inhibited phosphate transport. This effect was not seen in phosphate-replete cells.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Allen M. B., Arnon D. I. Studies on Nitrogen-Fixing Blue-Green Algae. I. Growth and Nitrogen Fixation by Anabaena Cylindrica Lemm. Plant Physiol. 1955 Jul;30(4):366–372. doi: 10.1104/pp.30.4.366. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Batterton J. C., Van Baalen C. Phosphorus deficiency and phosphate uptake in the blue-green alga Anacystis nidulans. Can J Microbiol. 1968 Apr;14(4):341–348. doi: 10.1139/m68-056. [DOI] [PubMed] [Google Scholar]
- Grillo J. F., Gibson J. Regulation of phosphate accumulation in the unicellular cyanobacterium Synechococcus. J Bacteriol. 1979 Nov;140(2):508–517. doi: 10.1128/jb.140.2.508-517.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Niemeyer R., Richter G. Schnellmarkierte Polyphosphate und Metaphosphate bei der Glaualge Anacystis niculans. Arch Mikrobiol. 1969;69(1):54–59. [PubMed] [Google Scholar]
- Schindler D. W. Eutrophication and recovery in experimental lakes: implications for lake management. Science. 1974 May 24;184(4139):897–899. doi: 10.1126/science.184.4139.897. [DOI] [PubMed] [Google Scholar]
- Sicko-Goad L., Jensen T. E., Ayala R. P. Phosphate metabolism in blue-green bacteria. V. Factors affecting phosphate uptake in Plectonema boryanum. Can J Microbiol. 1978 Feb;24(2):105–108. doi: 10.1139/m78-019. [DOI] [PubMed] [Google Scholar]