Nutrichemical alterations in different fractions of multiple-harvest alfalfa (Medicago sativa L.) green biomass fortified with various selenium forms

Kovács, Zoltán; Soós, Áron; Kovács, Béla; Kaszás, László; Elhawat, Nevien; Razem, Mutasem; Veres, Szilvia; Fári, Miklós; Koroknai, Judit; Alshaal, Tarek; Domokos-Szabolcsy, Éva

doi:10.1007/s11104-023-05917-8

Cited by 4 publications

(2 citation statements)

References 39 publications

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“…Biofortification and stimulation were seen not only to enhance plant growth but also to aid in the reduction of the usage of chemical fertilizers and aid resistance by plants against various abiotic stresses and pathogens. According to [106], alfalfa biofortified with selenium fed to livestock daily is one of the most effective ways to improve selenium levels in animals, especially meat, which provides enough selenium to humans when consumed. Furthermore, it is important to note that concentrations of selenium in meat have been observed to be directly proportional to the selenium levels in feed and pastures, making biofortification a useful tool in increasing selenium levels for both humans and animals [2].…”

Section: Pasture and Cropsmentioning

confidence: 99%

Selenium Status of Southern Africa

Chilala,

Skalickova,

Horky

2024

Nutrients

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Selenium is an essential trace element that exists in inorganic forms (selenite and selenates) and organic forms (selenoamino acids, seleno peptides, and selenoproteins). Selenium is known to aid in the function of the immune system for populations where human immunodeficiency virus (HIV) is endemic, as studies suggest that a lack of selenium is associated with a higher risk of mortality among those with HIV. In a recent study conducted in Zambia, adults had a median plasma selenium concentration of 0.27 μmol/L (IQR 0.14–0.43). Concentrations consistent with deficiency (<0.63 μmol/L) were found in 83% of adults. With these results, it can be clearly seen that selenium levels in Southern Africa should be investigated to ensure the good health of both livestock and humans. The recommended selenium dietary requirement of most domesticated livestock is 0.3 mg Se/kg, and in humans above 19 years, anRDA (recommended daily allowance) of 55 mcg Se/per dayisis recommended, but most of the research findings of Southern African countries have recorded low levels. With research findings showing alarming low levels of selenium in soils, humans, and raw feed materials in Southern Africa, further research will be vital in answering questions on how best to improve the selenium status of Southern African soils and plants for livestock and humans to attain sufficient quantities.

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Section: Pasture and Cropsmentioning

confidence: 99%

Selenium Status of Southern Africa

Chilala,

Skalickova,

Horky

2024

Nutrients

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“…The main organic Se form was SeMet in maize, groundnut and cowpea. SeMet had the largest ratio in durum wheat (Poblaciones et al 2014b), rice grain (Yuan et al 2023) and alfalfa (Kovács et al 2023). In general, non-accumulator crop species, such as cereal crops, contain organic Se mainly in the form of SeMet, while in Se-accumulator species, like species in the Brassicaceae family, higher molecular mass Se species such as selenohomolanthionine, selenocystathionine and selenolanthionine are also found in higher ratios (Schiavon et al 2020;Schiavon and Pilon-Smits 2017;Ogra et al 2007;Both et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of selenium species in the edible parts of cabbage, carrot, tomato and green pea treated with selenate-enriched irrigation water

Ragályi,

Takács,

Soós

et al. 2023

Plant Soil

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Background and aims Selenium (Se)-biofortified foods are able to compensate for Se deficient diets, but the proportion of different Se species varies among plant species, and the bioavailability of Se species also varies. This study aims to examine the Se species composition of four vegetables. Methods The effect of Se-enriched irrigation water on the concentrations of Se species in the edible parts of cabbage, carrots, tomatoes and green peas grown on different soil types was investigated and quantified using HPLC-ICP-MS with either standard addition or isotope dilution. Results Cabbage leaf and carrot root contained a high proportion (88 and 92%, respectively) of selenate (SeVI), while in tomato fruit and green pea seed selenomethionine (SeMet) was found in the highest proportion (33% and 48%, respectively), but elemental Se was also detected. The elemental Se concentration of peas was significantly higher on sandy soil (2.29 mg kg−1) than on sandy silt (1.38 mg kg−1) or silt soil (1.34 mg kg−1). In 100 g of fresh edible parts, the largest amount of Se species was found in cabbage leaves, but organic Se in the form of SeMet was the most abundant in green peas, being significantly higher than in carrots or tomatoes. Tomatoes contained a nearly three-fold ratio of organic Se to inorganic Se, the latter being mostly comprised of the elemental form, which is unusually high in vegetables. The highest rate of unknown Se species exceeded 66% in the case of peas, while the highest identification rate (> 95%) of Se could be achieved in tomato. Conclusion Tomatoes converted the absorbed Se into organic Se in the highest ratio, while green peas had the highest amount of organic Se in fresh biomass, so biotransformation was the most effective for these vegetables without any significant biomass reduction. These vegetables may be adapted to soils with a higher Se content.

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