Methods to Enhance Selenium in Wheat through Biofortification: A Review

Riaz, Ambash; Abbas, Ali; Noor-ul-Huda,; Mubeen, Hira; Ibrahim, Nazia; Raza, Shahid

doi:10.4172/2155-952x.1000282

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, many ecotoxicology studies aim at developing a fundamental understanding of Se distribution, bioaccumulation and biomagnification (e.g., in marine organisms, terrestrial plants and mammals; Araie et al, 2008;Beilstein & Whanger, 1988;Einoder et al, 2018;Fowler et al, 1999;Reinfelder & Fisher, 1994). Other works use this knowledge on the metabolism of Se for radioactive diagnostic materials in medical science (Irons et al, 2006;Yang et al, 2017) and the development of new biotechnological solutions (e.g., alternatives to fertilizers for Se-deficient crops; Galinha et al, 2012;Riaz et al, 2018). Additionally, environmentally-oriented research works mainly focus on the sorption of Se to different solid phases in various liquid matrices in order to determine solid/liquid partitioning in pure and natural sediments for purposes of environmental risk assessment, for example, related to radionuclide mobility or plant uptake in Se-deficient areas.…”

Section: Anthropogenic Radiotracer 75 Sementioning

confidence: 99%

Radioactive selenium: origin and environmental dispersion scenarios

Gil-Díaz¹,

Heberling²,

Eiche³

2021

Environmental Technologies to Treat Selenium Pollution

View full text Add to dashboard Cite

Radionuclides can be present in the environment from both natural and anthropogenic origins, showing characteristic biogeochemical behaviours according to the specific properties of the element. The environmental mobility and bioavailability of selenium (Se) strongly depends on the chemical species which, in turn, depends on aspects like redox state and microbiology. Among the most common oxidation states, species of Se(IV) and Se(VI) are considered relatively mobile and bioavailable. Once incorporated within an organism, Se shows a narrow band between dietary deficiency (e.g., used as a co-factor in functional proteins and RNA) and toxicity (e.g., selenosis, dependent on the concentrations and the chemical species involved; Jeffery et al., 2002). The recommended daily intake for adult humans is limited to 1 μg kg −1 of body weight, with a maximum allowable concentration in drinking water of 10 μg L −1 (WHO [World Health Organization], 2011). In addition, Se has no essential metabolism in plants but it is still readily taken up and accumulated due to its structural similarity with other oxyanion forms of bio-essential elements like sulfate and phosphate (Pilon-Smits et al., 2017).

show abstract

Section: Anthropogenic Radiotracer 75 Sementioning

confidence: 99%

Radioactive selenium: origin and environmental dispersion scenarios

Gil-Díaz¹,

Heberling²,

Eiche³

2021

Environmental Technologies to Treat Selenium Pollution

View full text Add to dashboard Cite

show abstract

“…Most surface waters have small concentrations of Se (0.06-0.12 lg L -1 ), whereas groundwater Se can reach up to 6000 lg L -1 in some areas (Alexander, 2015;Fordyce, 2013), presumably because of Se-rich parent material. Selenium is not considered essential for higher plants, but it is taken up by plants via sulphate (selenate) and phosphate (selenite) transporters (Alexander, 2015;Gupta & Gupta, 2017;Malagoli et al, 2015;Riaz et al, 2018;White, 2016). Plants differ in their ability to accumulate Se (Alexander, 2015;Broadley et al, 2006;Barillas et al, 2011;Ebrahimi et al 2019;Woch & Hawrylak-Nowak, 2019;Yang et al 2017).…”

mentioning

confidence: 99%

Multiple geochemical factors may cause iodine and selenium deficiency in Gilgit-Baltistan, Pakistan

Shariati

Bailey

Arshad

et al. 2021

Environ Geochem Health

View full text Add to dashboard Cite

Deficiencies of the micronutrients iodine and selenium are particularly prevalent where populations consume local agricultural produce grown on soils with low iodine and selenium availability. This study focussed on such an area, Gilgit-Baltistan in Pakistan, through a geochemical survey of iodine and selenium fractionation and speciation in irrigation water and arable soil. Iodine and selenium concentrations in water ranged from 0.01–1.79 µg L−1 to 0.016–2.09 µg L−1, respectively, which are smaller than levels reported in similar mountainous areas in other parts of the world. Iodate and selenate were the dominant inorganic species in all water samples. Average concentrations of iodine and selenium in soil were 685 µg kg−1 and 209 µg kg−1, respectively, much lower than global averages of 2600 and 400 µg kg−1, respectively. The ‘reactive’ fractions (‘soluble’ and ‘adsorbed’) of iodine and selenium accounted for < 7% and < 5% of their total concentrations in soil. More than 90% of reactive iodine was organic; iodide was the main inorganic species. By contrast, 66.9 and 39.7% of ‘soluble’ and ‘adsorbed’ selenium, respectively, were present as organic species; inorganic selenium was mainly selenite. Very low distribution coefficients (kd = adsorbed/soluble; L kg−1) for iodine (1.07) and selenium (1.27) suggested minimal buffering of available iodine and selenium against leaching losses and plant uptake. These geochemical characteristics suggest low availability of iodine and selenium in Gilgit-Baltistan, which may be reflected in locally grown crops. However, further investigation is required to ascertain the status of iodine and selenium in the Gilgit-Baltistan food supply and population.

show abstract