The Molecular Composition of Hydrophilic Sulfur Sols Prepared by Acid Decomposition of Thiosulfate [1]

Steudel, Ralf; Göbel, Thomas; Holdt, Gabriele

doi:10.1515/znb-1988-0212

Cited by 123 publications

(41 citation statements)

References 14 publications

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“…The pattern of rapid S 0 globule nucleation, followed by growth but no new visible globule production, can be explained by aggregation and Ostwald particle ripening. S 8 rings can quickly aggregate into very small condensed forms of sulfur (Steudel et al, 1988;Steudel, 1996Steudel, , 2003, with a critical nucleus size as low as 30 nm (Chaudhuri & Paria, 2010). Attraction between these clusters causes further aggregation (Garcia & Druschel, 2014).…”

Section: Discussionmentioning

confidence: 99%

Mechanisms of extracellular S0 globule production and degradation in Chlorobaculum tepidum via dynamic cell–globule interactions

et al. 2016

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The Chlorobiales are anoxygenic phototrophs that produce solid, extracellular elemental sulfur globules as an intermediate step in the oxidation of sulfide to sulfate. These organisms must export sulfur while preventing cell encrustation during S 0 globule formation; during globule degradation they must find and mobilize the sulfur for intracellular oxidation to sulfate. To understand how the Chlorobiales address these challenges, we characterized the spatial relationships and physical dynamics of Chlorobaculum tepidum cells and S 0 globules by light and electron microscopy. Cba. tepidum commonly formed globules at a distance from cells. Soluble polysulfides detected during globule production may allow for remote nucleation of globules. Polysulfides were also detected during globule degradation, probably produced as an intermediate of sulfur oxidation by attached cells. Polysulfides could feed unattached cells, which made up over 80% of the population and had comparable growth rates to attached cells. Given that S 0 is formed remotely from cells, there is a question as to how cells are able to move toward S 0 in order to attach. Time-lapse microscopy shows that Cba. tepidum is in fact capable of twitching motility, a finding supported by the presence of genes encoding type IV pili. Our results show how Cba. tepidum is able to avoid mineral encrustation and benefit from globule degradation even when not attached. In the environment, Cba. tepidum may also benefit from soluble sulfur species produced by other sulfur-oxidizing or sulfur-reducing bacteria as these organisms interact with its biogenic S 0 globules.

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Section: Discussionmentioning

confidence: 99%

Mechanisms of extracellular S0 globule production and degradation in Chlorobaculum tepidum via dynamic cell–globule interactions

et al. 2016

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“…Central to the pathways leading to S storage mechanisms, are microbially catalyzed reactions involving either the acid-consuming disproportionation of S 2 O 3 2À , or the hydrolysis of S 4 O 6 2À at low pH, to polysulfane monosulfonic acids ðHS n SO 3 À Þ, which may then be further processed to yield polythionates (Steudel et al, 1987;Steudel et al, 1988;Pronk et al, 1990;Steudel, 2003). The generation of these species accounts for the pool of ''Other S species'' as determined by mass balance calculations, and is entirely consistent with the H + consumption observed (Fig.…”

Section: Microbial S Disproportionation Reaction Pathwaysmentioning

confidence: 99%

Geochemical diversity in S processes mediated by culture-adapted and environmental-enrichments of Acidithiobacillus spp.

Bernier

Warren

2007

Geochimica et Cosmochimica Acta

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“…Therefore, the concentration of elemental sulphur, which consists mainly of cyclic octamers (S,; Steudel et al 1987Steudel et al , 1988, was analysed according to Lauren & Watkinson (1985). The tissues were deep frozen and ground in liquid nitrogen, homogenized in 200 p1 ice-cold chloroform, and shaken RESULTS for 20 h at -0°C.…”

Section: Animalsmentioning

confidence: 99%

Different degrees of tolerance to hydrogen sulphide in populations of Macoma balthica (Bivalvia, Tellinidae)

Jahn¹,

Theede²

1997

Mar. Ecol. Prog. Ser.

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Populations of the Baltic clam Macoma balthica show different degrees of sulphide tolerance in relation to s u l p h~d e contamination of their habitats. Specimens from sulphidic habitats such a s the Gulf of G d k k (Baltic Proper) and shallo~v waters near the island of Hiddensee (Southern Baltic Sea) have higher survival capaclt~es during sulphide exposure than those from low sulphide contaminated environments such as K~e l Bight (Western Baltic Sea) and the Wadden Sea near Dorum-Neufeld (Weser estuary, North Sea). The tolerant clams are better able to protect cytochrome c oxidase against sulphide toxification. It can b e assumed that this protection is due to slower sulphide diffus~on Into the tissues Sulphide-tolerant specimens from h~g h l y sulphidic habitats have apparent sulphide d~ffusion coefflc~ents which al-e roughly half those of sulphide-sensitive specimens from low sulphidic stations.Higher s u l p h~d e influx into the sensitive clams will negatively affect t h e~r metabolism, combined with longer inhibition of cytochrome c oxidase, resulting in higher mortality.

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The Molecular Composition of Hydrophilic Sulfur Sols Prepared by Acid Decomposition of Thiosulfate [1]

Cited by 123 publications

References 14 publications

Mechanisms of extracellular S0 globule production and degradation in Chlorobaculum tepidum via dynamic cell–globule interactions

Mechanisms of extracellular S0 globule production and degradation in Chlorobaculum tepidum via dynamic cell–globule interactions

Geochemical diversity in S processes mediated by culture-adapted and environmental-enrichments of Acidithiobacillus spp.

Different degrees of tolerance to hydrogen sulphide in populations of Macoma balthica (Bivalvia, Tellinidae)

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