Uptake of polonium and sulfur by bacteria

Cherrier, Jennifer; Burnett, William C.; LaRock, Paul A.

doi:10.1080/01490459509378009

Cited by 75 publications

(45 citation statements)

References 19 publications

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“…The known bio-reactive behavior 737 of 210 Po and its association with sulfur (Balistrieri et al, 1995;Cherrier et al, 1995;Harada 738 et al, 1989), both suggest its cycling in particles is more complicated than 210 Pb cycling and 739 supports our hypothesis that important end-members were missing for the model of K d (Po). 740…”

supporting

confidence: 71%

The influence of particle concentration and composition on the fractionation of 210Po and 210Pb along the North Atlantic GEOTRACES transect GA03

Tang

Stewart

Lam

et al. 2017

Deep Sea Research Part I: Oceanographic Research Papers

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supporting

confidence: 71%

The influence of particle concentration and composition on the fractionation of 210Po and 210Pb along the North Atlantic GEOTRACES transect GA03

Tang

Stewart

Lam

et al. 2017

Deep Sea Research Part I: Oceanographic Research Papers

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“…Cherrier et al (1995) followed uptake kinetics of Po and 35 S into bacteria cells and found that the patterns of uptake were different but the final distribution within the cells was similar for these two elements. Fisher et al (1983b) also found 210 Po associated with the S-containing protein faction of two species of phytoplankton cells.…”

Section: Discussionmentioning

confidence: 99%

“…The model differentiates between 210 Po adsorbed to the external surface of the cell and 210 Po associated with cellular proteins. These two pools were considered because 210 Po is reactive for particle surfaces and is known to associate with sulfur in singlecelled organisms (Fisher et al 1983a;Cherrier et al 1995;LaRock et al 1996). Because the partitioning of 210 Po between the cells and dissolved phase seemed to reach an equilibrium during the uptake experiments (Fig.…”

Section: Discussionmentioning

confidence: 99%

Experimental studies on the accumulation of polonium‐210 by marine phytoplankton

Stewart

Fisher

2003

Limnology & Oceanography

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Bioaccumulation of polonium-210 (t 1/2 ϭ 138 d) in marine phytoplankton can introduce this naturally occurring radioisotope into food chains, where it accounts for most of the radiation dose to marine organisms and to human consumers of seafood. Moreover, this isotope could be useful as a tracer of the flux of organic matter in ocean surface waters. We performed laboratory experiments with eight algal species representing six algal divisions to quantify the uptake, cellular partitioning, and retention of 210 Po by algae. Biological uptake was unaffected by temperature or light, and volume concentration factors (VCFs) for these algal species ranged between 0.5 and 3.0 ϫ 10 4 . Interspecific differences in VCFs could be explained by considering the surface area to volume ratios of the cells and cellular protein content. Once associated with the cells, between 30 and 60% of the total cellular 210 Po was in the cytoplasm of the different species.210 Po was not irreversibly bound to the cells but displayed a biological half-life of ϳ23 d. Because 210 Po associates appreciably with organic matter inside cells, unlike other particlereactive nonessential metals, it could have promise as a tracer of sinking organic matter in the ocean.

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“…Bacteria have been implicated in polonium mobilization from phosphate mineral deposits into groundwater and proposed as a remedial strategy for contaminated groundwater (14,32). As closely related Bacillus and Rhodotorula spp.…”

Section: Discussionmentioning

confidence: 99%

Volatilization and Precipitation of Tellurium by Aerobic, Tellurite-Resistant Marine Microbes

Ollivier

Bahrou

Marcus

et al. 2008

Appl Environ Microbiol

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Microbial resistance to tellurite, an oxyanion of tellurium, is widespread in the biosphere, but the geochemical significance of this trait is poorly understood. As some tellurite resistance markers appear to mediate the formation of volatile tellurides, the potential contribution of tellurite-resistant microbial strains to trace element volatilization in salt marsh sediments was evaluated. Microbial strains were isolated aerobically on the basis of tellurite resistance and subsequently examined for their capacity to volatilize tellurium in pure cultures. The tellurite-resistant strains recovered were either yeasts related to marine isolates of Rhodotorula spp. or gram-positive bacteria related to marine strains within the family Bacillaceae based on rRNA gene sequence comparisons. Most strains produced volatile tellurides, primarily dimethyltelluride, though there was a wide range of the types and amounts of species produced. For example, the Rhodotorula spp. produced the greatest quantities and highest diversity of volatile tellurium compounds. All strains also produced methylated sulfur compounds, primarily dimethyldisulfide. Intracellular tellurium precipitates were a major product of tellurite metabolism in all strains tested, with nearly complete recovery of the tellurite initially provided to cultures as a precipitate. Different strains appeared to produce different shapes and sizes of tellurium containing nanostructures. These studies suggest that aerobic marine yeast and Bacillus spp. may play a greater role in trace element biogeochemistry than has been previously assumed, though additional work is needed to further define and quantify their specific contributions.Microbial resistance to the inorganic oxyanion tellurite (TeO 3 2Ϫ

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Uptake of polonium and sulfur by bacteria

Cited by 75 publications

References 19 publications

The influence of particle concentration and composition on the fractionation of 210Po and 210Pb along the North Atlantic GEOTRACES transect GA03

The influence of particle concentration and composition on the fractionation of 210Po and 210Pb along the North Atlantic GEOTRACES transect GA03

Experimental studies on the accumulation of polonium‐210 by marine phytoplankton

Volatilization and Precipitation of Tellurium by Aerobic, Tellurite-Resistant Marine Microbes

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