The measurement of sulphur‐containing amino acids in some scottish soils

Scott, Norman M.; Bick, W.; Anderson, Helen

doi:10.1002/jsfa.2740320105

Cited by 14 publications

(4 citation statements)

References 10 publications

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“…Cysteine and methionine amino acids compose a significant portion of the total organic sulfur in certain soils and also in the rhizosphere region of others. In the present study, Trichosporon jirovecii was previously isolated and identified from the Egyptian agriculture soil ; its capability to utilize cysteine or sodium sulfide and liberate sulfur under cadmium stress conditions was examined.…”

Section: Discussionmentioning

confidence: 99%

Trichosporon jirovecii–mediated synthesis of cadmium sulfide nanoparticles

El-Baz

Sorour

Shetaia

2015

J. Basic Microbiol.

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Cadmium sulphide is one of the most promising materials for solar cells and of great interest due to its useful applications in photonics and electronics, thus the development of bio-mediated synthesis of cadmium sulphide nanoparticles (CdS NPs) is one of the essential areas in nanoparticles. The present study demonstrates for the first time the eco-friendly biosynthesis of CdS NPs using the yeast Trichosporon jirovecii. The biosynthesis of CdS NPs were confirmed by UV-Vis spectrum and characterized by X-ray diffraction assay and electron microscopy. Scanning and transmission electron microscope analyses shows the formation of spherical CdS NPs with a size range of about 6-15 nm with a mean Cd:S molar ratio of 1.0:0.98. T. jirovecii produced hydrogen sulfide on cysteine containing medium confirmed by positive cysteine-desulfhydrase activity and the colony color turned yellow on 0.1 mM cadmium containing medium. T. jirovecii tolerance to cadmium was increased by the UV treatment and three 0.6 mM cadmium tolerant mutants were generated upon the UV radiation treatment. The overall results indicated that T. jirovecii could tolerate cadmium toxicity by its conversion into CdS NPs on cysteine containing medium using cysteine-desulfhydrase as a defense response mechanism.

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Section: Discussionmentioning

confidence: 99%

Trichosporon jirovecii–mediated synthesis of cadmium sulfide nanoparticles

El-Baz

Sorour

Shetaia

2015

J. Basic Microbiol.

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“…C. thermoaceticum was originally isolated from horse manure (8) and is possibly a soil microorganism. Cysteine and methionine compose a significant portion of the total organic sulfur in certain soils (40) and in the rhizosphere (6). Sulfide has been shown to be produced in cysteineand cystine-amended soils as a result of mineralization of the amino acids rather than sulfate reduction (46).…”

Section: Discussionmentioning

confidence: 99%

Precipitation of cadmium by Clostridium thermoaceticum

Cunningham

Lundie

1993

Appl Environ Microbiol

186

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Cadmium at an initial concentration of 1 mM was completely precipitated by cultures of Clostridium thermoaceticum in complex medium. The precipitation was energy dependent and required cysteine, although cysteine alone did not act as a growth substrate. Electron microscopic analysis revealed localized areas of precipitation at the surfaces of nonstarved cells as well as precipitate in the surrounding medium. The addition of cadmium had no apparent effect on growth or acetogenesis. However, nickel and cadmium were * Corresponding author.

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“…[23] An average of 26% of soil S, equivalent to 46% of the C-bonded S, was estimated to be present as amino acids. [11] Scott et al [24] reported that from 11 to 17% of the total soil S, equivalent to 19 to 31% of the C-bonded S, in some Scottish soils occurred in amino acids. Compounds containing thiol groups in the soil have significant biogeochemical function, because they are not only bioavailable but are effective for binding heavy metals.…”

Section: Effects Of Bi-thiol Contamination On Dehydrogenase Activity mentioning

confidence: 99%

Effects of Bismuth Contamination on the Growth and Activity of Soil Microorganisms Using Thiols as Model Compounds

Murata

2006

Journal of Environmental Science and Health, Part A

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The present study was undertaken to obtain information about the effects of Bi contamination on soil microbial growth and activity using a series of Bi complexes with thiol compounds, including mercaptoethanol, thioglycerol, mercaptoethylamine, thioglycolic acid, thiomallic acid, reduced glutathione, 2-mercaptopropionic acid, and L-cysteine. We found that Bi complexes with mercaptoethanol, thioglycerol, and mercaptoethylamine, all of which showed lipophilicity, markedly inhibited bacterial growth in 1/10 TSB liquid media in both Eutric Cambisol (brown forest soil) and Eutric Fluvisol (brown lowland soil), with relative CFU of less than 2% at 50 micro M Bi and 6% at 25 micro M Bi. However, none of the Bi-thiols, including Highly lipophilic complexes, at 200 micro M Bi in rosebengal agar medium inhibited fungal growth, possibly because fungi have a metabolic system that protects against Bi uptake or detoxifies Bi compounds. When soil was contaminated experimentally with Bi-thiol, these complexes suppressed soil dehydrogenase activity, particularly in brown forest soil, which contains large amounts of easily decomposable organic matter. These results indicate that the effects of Bi on soil microbes may depend on mutual reactions with organic matter in the environment.

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The measurement of sulphur‐containing amino acids in some scottish soils

Cited by 14 publications

References 10 publications

Trichosporon jirovecii–mediated synthesis of cadmium sulfide nanoparticles

Trichosporon jirovecii–mediated synthesis of cadmium sulfide nanoparticles

Precipitation of cadmium by Clostridium thermoaceticum

Effects of Bismuth Contamination on the Growth and Activity of Soil Microorganisms Using Thiols as Model Compounds

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