Bioavailability of selenium in soil-plant system and a regulatory approach
19 Mar 2019-Critical Reviews in Environmental Science and Technology (Taylor & Francis)-Vol. 49, Iss: 6, pp 443-517
TL;DR: The effect of various soil parameters on the bioavailability of Se, its uptake and translocation in relation to plant species, genotypes, growth stages, and management regimes, and potential methods for regulating the bio availability are discussed.
Abstract: Understanding the bioavailability of selenium (Se) in the soil–plant system plays a vital role in phytoremediation and agronomic biofortification strategies. This review aimed to (a) discuss the ef...
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01 Jan 2016
230 citations
10 Jul 2015
TL;DR: The nationwide supplementation of fertilizers with sodium selenate is shown to be effective and safe in increasing the Se intake of the whole population and the health of animals has improved.
Abstract: Despite different geological features the Nordic countries are generally selenium-poor areas. In each country various factors such as food importation and life-style determine the selenium (Se) intake. Due to an extremely low Se intake in the 1970s in Finland, 0.025 mg/day, an official decision was made in 1984 to supplement multinutrient fertilizers with Se in the chemical form of sodium selenate. Almost all fertilizers used in Finland since 1985 have contained Se. Currently all crop fertilizers contain 15 mg Se/kg. Finland is still the only country to take this country-wide measure. In a national monitoring programme, sampling of cereals, basic foodstuffs, feeds, fertilizers, soils, and human tissues has been carried out annually since 1985 by four governmental research organizations. Sampling of foods has been done four times per year and human blood has been obtained annually from the same (n=60) adults. The accuracy of analyses has been verified by annual interlaboratory quality control. During this programme the selenium concentration of spring cereals has increased on average 15-fold compared with the level before the Se fertilization. The mean increase in the Se concentration in beef, pork and milk was 6-, 2- and 3-fold. In terms of Se, organically grown foods of plant origin are generally comparable to products produced before the Se supplementation of fertilizers. Milk from organically fed cows is 50% lower in Se than the usual milk. The average dietary human intake increased from 0.04 mg Se/day/10 MJ in 1985 to a present plateau of 0.08 mg Se/day/10 MJ, which is well above the current nutrition recommendations. Foods of animal origin contribute over 70% of the total daily Se intake. The mean human plasma Se concentration increased from 0.89 μmol/L to a general level of 1.40 μmol/L that can be considered to be an optimal status. The absence of Se deficiency diseases and a reference population have made conclusions on the impact on human health difficult. However, the rates of cardiovascular diseases and cancers have remained similar during the pre- and post-supplementation indicating medical and life-style factors to be much stronger determinants than Se. The nationwide supplementation of fertilizers with sodium selenate is shown to be effective and safe in increasing the Se intake of the whole population. Also, the health of animals has improved.
219 citations
01 Jan 1968
192 citations
TL;DR: In this paper, a gap of knowledge regarding dose-response relationship of trace elements in soil-plant-human systems was identified, especially for trace element dose response in soil plants.
Abstract: Despite considerable research about biogeochemical behavior of trace elements (TEs) in soil-plant-human systems, there is still a gap of knowledge regarding dose–response relationship, especially f...
77 citations
Cites background from "Bioavailability of selenium in soil..."
...Some TEs such as copper (Cu), selenium (Se), zinc (Zn), nickel (Ni), manganese (Mn), cobalt (Co) and chromium (Cr) play essential roles in biochemical processes, and hence induce stimulatory growth effects when exposed to living organisms up to an optimal level (B€ ucker-Neto, Paiva, Machado, Arenhart, & MargisPinheiro, 2017; Chauhan et al., 2019; Dinh et al., 2019; Rafiq et al., 2018; Xia et al., 2019)....
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References
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TL;DR: A meta-analysis of a regional acidification phenomenon in Chinese arable soils that is largely associated with higher N fertilization and higher crop production is presented, likely to threaten the sustainability of agriculture and affect the biogeochemical cycles of nutrients and also toxic elements in soils.
Abstract: Soil acidification is a major problem in soils of intensive Chinese agricultural systems. We used two nationwide surveys, paired comparisons in numerous individual sites, and several long-term monitoring-field data sets to evaluate changes in soil acidity. Soil pH declined significantly ( P + ) per hectare per year, and base cations uptake contributed a further 15 to 20 kilomoles of H + per hectare per year to soil acidification in four widespread cropping systems. In comparison, acid deposition (0.4 to 2.0 kilomoles of H + per hectare per year) made a small contribution to the acidification of agricultural soils across China.
2,736 citations
"Bioavailability of selenium in soil..." refers background in this paper
...…OM… ) leading to redistribution of Se speciation in soil; or (4) dilution effect of accumulated Se with increased plant biomass (Figure 7) (Mora, Pinilla, Rosas, & Cartes, 2008; Guo et al., 2010; Li, Ba~nuelos, Min, & Shi, 2015a; Liu et al., 2015; Zhang, Dong, Ye, & Hou, 2017b; Reis et al., 2018)....
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TL;DR: The crucial factor that needs to be emphasised with regard to the health effects of selenium is the inextricable U-shaped link with status; whereas additional seenium intake may benefit people with low status, those with adequate-to-high status might be affected adversely and should not take selenum supplements.
2,297 citations
"Bioavailability of selenium in soil..." refers background in this paper
...Both Se deficiency and excess intake will adversely affect human health (Rayman, 2012)....
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Book•
29 Jun 2001
TL;DR: In this article, biogeochemical processes are used to regulate metal behavior and regulate the bioavailability of trace metals, and risk assessment and management in metal-contaminated sites.
Abstract: 1 Introduction- 2 Biogeochemical Processes Regulating Metal Behavior- 3 Bioavailability of Trace Metals- 4 Environmental Contamination and Regulation- 5 Ecological and Health Risks of Metals- 6 Risk Assessment and Management in Metal-Contaminated Sites- 7 Arsenic- 8 Cadmium- 9 Chromium- 10 Lead- 11 Mercury- 12 Boron- 13 Copper- 14 Manganese- 15 Molybdenum- 16 Zinc- 17 Nickel- 18 Selenium- 19 Other Trace Elements- Appendix A Tables- Appendix B Abbreviations, Acronyms, Symbols, and Terms- Appendix C Scientific Names for Plants and Animals- About the Author
1,978 citations
"Bioavailability of selenium in soil..." refers background in this paper
...Precipitation and dissolution reactions are important processes, which directly impact Se availability in the soil solution (Adriano, 2001)....
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01 Jan 2001
1,892 citations
"Bioavailability of selenium in soil..." refers background in this paper
...Precipitation and dissolution reactions are important processes, which directly impact Se availability in the soil solution (Adriano, 2001)....
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Book•
01 Jan 2013
TL;DR: In this article, the authors defined the sources of heavy metals and metalloids in Soils and derived methods for the determination of Heavy Metals and Metalloids in soil.
Abstract: Preface.- Contributors.- List of Abbreviations.- Section 1: Basic Principles: Introduction.-Sources of Heavy Metals and Metalloids in Soils.- Chemistry of Heavy Metals and Metalloids in Soils.- Methods for the Determination of Heavy Metals and Metalloids in Soils.- Effects of Heavy Metals and Metalloids on Soil Organisms.- Soil-Plant Relationships of Heavy Metals and Metalloids.- Heavy Metals and Metalloids as Micronutrients for Plants and Animals.-Critical Loads of Heavy Metals for Soils.- Section 2: Key Heavy Metals And Metalloids: Arsenic.- Cadmium.- Chromium and Nickel.- Cobalt and Manganese.- Copper.-Lead.- Mercury.- Selenium.- Zinc.- Section 3: Other Heavy Metals And Metalloids Of Potential Environmental Significance: Antimony.- Barium.- Gold.- Molybdenum.- Silver.- Thallium.- Tin.- Tungsten.- Uranium.- Vanadium.- Glossary of Specialized Terms.- Index.
1,684 citations