60Co retention by a freshwater planktonic alga Scenedesmus obliquus

Nucho, R.; Baudin, J. P.

doi:10.1016/0269-7491(89)90149-8

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…Co(II) may form very stable complexes with metalloproteins (7, 33) because of its high affinity for amino acid thiol groups and because it can replace other divalent cations as cofactors for various enzymes (33). Other studies with phytoplankton also indicate that some fraction of the total cobalt cannot be eliminated from cells (46). Cell walls of B. subtilis are also known to adsorb several heavy metals (16,64).…”

Section: Discussionmentioning

confidence: 99%

“…The low concentrations of Co and limitations in current methodology have hindered our understanding of the geochemical cycle of cobalt, and thus, the biological contribution to cobalt cycling in natural environments is not well known. Although there are a few reports on the adsorption of Co by both live and dead phytoplankton (19,34), algae (18,39,46), and bacteria (25), there are few reports about biological involvement in Co redox chemistry (56,58).…”

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confidence: 99%

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Cobalt(II) Oxidation by the Marine Manganese(II)-Oxidizing Bacillus sp. Strain SG-1

Lee

Tebo

1994

Appl Environ Microbiol

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The geochemical cycling of cobalt (Co) has often been considered to be controlled by the scavenging and oxidation of Co(II) on the surface of manganese [Mn(III,1V)] oxides or manganates. Because Mn(II) oxidation in the environment is often catalyzed by bacteria, we have investigated the ability of Mn(II)-oxidizing bacteria to bind and oxidize Co(II) in the absence of Mn(II) to determine whether some Mn(II)-oxidizing bacteria also oxidize Co(II) independently of Mn oxidation. We used the marine Bacillus sp. strain SG-1, which produces mature spores that oxidize Mn(II), apparently due to a protein in their spore coats (R.A. Rosson and K. H.

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