Bacteria phosphorus compounds

Incubation of lake water with 32P or 33P as tracers and subsequent gel chromatography reveals that a major pathway exists between dissolved orthophosphate and the particulate phase (3, 5-7). Low-molecular-weight phosphorus forms in the presence of bacteria and algae. SUP is present in the low-molecular-weight fraction and is classified as individual DOP compounds unassociated with particulate or colloidal material. The HMW fraction found in gel chromatography studies is characterized as a colloid that contains phosphorus compounds or incorporates orthophosphate. The colloidal material then releases orthophosphate, replenishing the dissolved phosphorus cycle. In some eutrophic lakes the HMW SRP fraction can make... 

H. Hase, S. Miyachi and S. Mihara (1963). A preliminary note on the phosphorus compounds in chloroplasts and volutin granules isolated from Chlorelta cells. In H. Tamiya (Ed.), Microalgae and Photosyntetic Bacteria, University of Tokyo Press, Tokyo, Japan, p. 619. 

When ciliates consume the bacteria, the nutrition stored in the organic matter becomes available to the rest of the food chain. Ciliates also excrete nitrogen and phosphorus compounds, making these inorganic materials available to the bacterial population and helping to perpetuate the food web. 

Utilization of phosphate monoesters by microalgae and bacteria is effected by phosphomonoesterases (phosphatases) of broad specificity present at the cell surface. Hydrolytic release of PO4- from sugar phosphates, nucleotide phosphates, phospholipids, and phenyl phosphates, to name a few, enables a wide variety of phosphorus containing compounds to be utilized as phosphorus sources for growth of microbes. Ultrastructural observations and results from biochemical experiments indicate that extracellular phosphatases cleave the phosphate moiety from dissolved organic phosphorus compounds, which is then internalized, leaving the carbon skeleton outside the cell (Kuenzler and Perras, 1965 Doonan and Jensen, 1977). 

Although aquatic biochemical ecologists have focused nearly exclusively on lytic processes for dissolved organic phosphorus utilization, heterotrophic bacteria can directly take up certain organic phosphorus compounds from their surrounding environment without prior hydrolysis (Table 9.2). E. coli is known to have two different processes by which glycerol 3-phosphate can be taken up without prior hydrolysis... 

Siuda, W. and Chrost, R.J. (2001) Utilization of selected dissolved organic phosphorus compounds by bacteria in lake water under nonlimiting orthophosphate conditions. Polish Journal of Environmental Studies 1 0, 475 83. 

W.P. Iverson. Possible source of a phosphorus compound produced by sulfate-reducing bacteria that cause anaerobic corrosion of iron. Materials Performance, Vol. 37, No. 5, pp. 46-49,1998. 

Enrichment cultures have been tried repeatedly in the past to search for bacteria that can utilize reduced phosphorus compounds as electron donors in their dis-similatory metabolism. Both hypophosphite and phosphite could be excellent electron donors for a microbial energy metabolism because their oxidation releases electrons at very low redox potentials (Table 1). So far, only one bacterium has been isolated that can run its energy metabolism on the basis of phosphite oxidation to phosphate. 

Iverson WP (1998) Possible source of a phosphorus compound produced by sulfate-reducing bacteria that cause anaerobic corrosion of iron. Mater Perform 37(5) 46-49 Videla HA, Herrera LK, Edyvean RG (2005) An updated overview of SRB induced corrosion and protection of carbon steel. Paper No. 05488, Corrosion 2005, NACE International Smith JS and Miller JDA, (1975) Nature of Sulphides and Their Corrosive Effect on Eer-rous Metals A Review, British Corrosion Journal, Vol. 10, No. 3, pp. 136-143 Hang DT (2003) Microbiological study of the anaerobic corrosion of iron. PhD Dissertation, University of Bremen, Bremen, Germany... 

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