Topic
Selenium cycle
About: Selenium cycle is a research topic. Over the lifetime, 14 publications have been published within this topic receiving 1025 citations.
Papers
TL;DR: This review focuses on microorganisms that use selenate and selenite as terminal electron acceptors, in parallel to the well-studied sulfate-reducing bacteria, and overviews the significant advancements made in recent years on the role of SeRB in the biological selenium cycle.
Abstract: SUMMARY In nature, selenium is actively cycled between oxic and anoxic habitats, and this cycle plays an important role in carbon and nitrogen mineralization through bacterial anaerobic respiration. Selenium-respiring bacteria (SeRB) are found in geographically diverse, pristine or contaminated environments and play a pivotal role in the selenium cycle. Unlike its structural analogues oxygen and sulfur, the chalcogen selenium and its microbial cycling have received much less attention by the scientific community. This review focuses on microorganisms that use selenate and selenite as terminal electron acceptors, in parallel to the well-studied sulfate-reducing bacteria. It overviews the significant advancements made in recent years on the role of SeRB in the biological selenium cycle and their ecological role, phylogenetic characterization, and metabolism, as well as selenium biomineralization mechanisms and environmental biotechnological applications.
388 citations
TL;DR: In this paper, high-performance liquid-chromatographic (HPLC) methods for the separation, identification and quantification of selenite, selenate, hydrogen selenide, methaneselenol, bis(organothio) selenides, trimethylselenononium salts, SE derivatives of carbohydrates and other miscellaneous selenium compounds are summarized.
Abstract: Selenium appears in the natural selenium cycle in the form of several organic and inorganic compounds. The biologically beneficial and deterimental effects of ‘selenium’ must be ascribed to particular selenium compounds. The identification and quantification of selenium compounds in biological and environmental samples is required for an understanding of the role of selenium. The high-performance liquid-chromatographic (HPLC) methods for the separation, identification and quantification of selenite, selenate, hydrogen selenide, methaneselenol, bis(organothio) selenides, trimethylselenonium salts, selenonamino-acids, selenium derivatives of carbohydrates, selenoproteins, selenonucleosides and other miscellaneous selenium compounds are summarized (193 references) and pertinent detection modes discussed. Advantages and disadvantages of the methods are pointed out. The literature is covered since 1974, the year of the first publication in this field.
53 citations
TL;DR: Anthropogenic activities have increased the selenium (Se) concentration in the biosphere, but the overall impact on the ocean has not been examined as discussed by the authors, while Se is an essential nutrient for microorgan...
Abstract: Anthropogenic activities have increased the selenium (Se) concentration in the biosphere, but the overall impact on the ocean has not been examined. While Se is an essential nutrient for microorgan ...
33 citations
TL;DR: It has been suggested that there is a selenium cycle in nature, but there is no evidence to substantiate some parts of this cycle, particularly where grassland is concerned.
Abstract: WITH the discovery of the importance and even the necessity of trace amounts of selenium in animal nutrition1, and with the recognition that the response of animals to the administration of selenium can vary2–5, it has become important to know more about the state of selenium in the soil and its uptake by plants. The first investigators were chiefly concerned with the uptake of selenium from seleniferous soil, with the accumulation of selenium by plants, and with the toxicity of these plants to domestic animals6. It has been suggested that there is a selenium cycle in nature7, but there is no evidence to substantiate some parts of this cycle, particularly where grassland is concerned.
19 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2019 | 1 |
| 2018 | 1 |
| 2015 | 1 |
| 2013 | 1 |
| 2009 | 1 |