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Fertilizing soil with selenium fertilizers: impact on concentration, speciation, and bioaccessibility of selenium in leek (Allium ampeloprasum)

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Abstract
Leek was fertilized with sodium selenite (Na2SeO3) and sodium selenate (Na2SeO4) in a green house to assess the impact of selenium (Se) fertilization on Se uptake by the crop and its speciation in the crop. The bioaccessibility of Se in the Se enriched leek was assessed using an in vitro extraction protocol mimicking the human gastrointestinal tract (stomach, small intestine, and colon). The lowest Se uptake was observed when Na2SeO3 was used as a fertilizer, which results in a higher risk for Se accumulation in the soil on a longer term. When soil was amended with Na2SeO4, 55 +/- 5% of total Se in the leek occurred in an inorganic form, while only 21 +/- 8% was inorganic when Na2SeO3 was applied. Se-methylselenocysteine and selenomethione were the major organic species in both treatments. However, concentrations of Se-methylselenocysteine and gamma-glutamyl-Se-methyl-selenocysteine, which were previously reported to induce positive health effects, were lower as compared to other Album species. The majority of the Se in the leek was found to be bioaccessible in the stomach (around 60%) and small intestine (around 80%). However, a significant fraction also has good chances to reach the colon, where it seems to be taken up by the microbial community and may also induce positive health effects.
Keywords
bioavailability, SELENATE, biofortification, leek, selenium speciation, selenate, selenite, HPLC-ICP-MS, BIOAVAILABILITY, VITRO GASTROINTESTINAL DIGESTION, MASS-SPECTROMETRY, LIQUID-CHROMATOGRAPHY, COLON-CANCER, SCHOENOPRASUM, TRANSLOCATION, FISTULOSUM

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MLA
Lavu, Rama et al. “Fertilizing Soil with Selenium Fertilizers: Impact on Concentration, Speciation, and Bioaccessibility of Selenium in Leek (Allium Ampeloprasum).” JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 60.44 (2012): 10930–10935. Print.
APA
Lavu, R., Du Laing, G., Van de Wiele, T., Pratti, V. L., Willekens, K., Vandecasteele, B., & Tack, F. (2012). Fertilizing soil with selenium fertilizers: impact on concentration, speciation, and bioaccessibility of selenium in leek (Allium ampeloprasum). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 60(44), 10930–10935.
Chicago author-date
Lavu, Rama, Gijs Du Laing, Tom Van de Wiele, Varalakshmi Lalithya Pratti, Koen Willekens, Bart Vandecasteele, and Filip Tack. 2012. “Fertilizing Soil with Selenium Fertilizers: Impact on Concentration, Speciation, and Bioaccessibility of Selenium in Leek (Allium Ampeloprasum).” Journal of Agricultural and Food Chemistry 60 (44): 10930–10935.
Chicago author-date (all authors)
Lavu, Rama, Gijs Du Laing, Tom Van de Wiele, Varalakshmi Lalithya Pratti, Koen Willekens, Bart Vandecasteele, and Filip Tack. 2012. “Fertilizing Soil with Selenium Fertilizers: Impact on Concentration, Speciation, and Bioaccessibility of Selenium in Leek (Allium Ampeloprasum).” Journal of Agricultural and Food Chemistry 60 (44): 10930–10935.
Vancouver
1.
Lavu R, Du Laing G, Van de Wiele T, Pratti VL, Willekens K, Vandecasteele B, et al. Fertilizing soil with selenium fertilizers: impact on concentration, speciation, and bioaccessibility of selenium in leek (Allium ampeloprasum). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY. 2012;60(44):10930–5.
IEEE
[1]
R. Lavu et al., “Fertilizing soil with selenium fertilizers: impact on concentration, speciation, and bioaccessibility of selenium in leek (Allium ampeloprasum),” JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, vol. 60, no. 44, pp. 10930–10935, 2012.
@article{3140676,
  abstract     = {Leek was fertilized with sodium selenite (Na2SeO3) and sodium selenate (Na2SeO4) in a green house to assess the impact of selenium (Se) fertilization on Se uptake by the crop and its speciation in the crop. The bioaccessibility of Se in the Se enriched leek was assessed using an in vitro extraction protocol mimicking the human gastrointestinal tract (stomach, small intestine, and colon). The lowest Se uptake was observed when Na2SeO3 was used as a fertilizer, which results in a higher risk for Se accumulation in the soil on a longer term. When soil was amended with Na2SeO4, 55 +/- 5% of total Se in the leek occurred in an inorganic form, while only 21 +/- 8% was inorganic when Na2SeO3 was applied. Se-methylselenocysteine and selenomethione were the major organic species in both treatments. However, concentrations of Se-methylselenocysteine and gamma-glutamyl-Se-methyl-selenocysteine, which were previously reported to induce positive health effects, were lower as compared to other Album species. The majority of the Se in the leek was found to be bioaccessible in the stomach (around 60%) and small intestine (around 80%). However, a significant fraction also has good chances to reach the colon, where it seems to be taken up by the microbial community and may also induce positive health effects.},
  author       = {Lavu, Rama and Du Laing, Gijs and Van de Wiele, Tom and Pratti, Varalakshmi Lalithya and Willekens, Koen and Vandecasteele, Bart and Tack, Filip},
  issn         = {0021-8561},
  journal      = {JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY},
  keywords     = {bioavailability,SELENATE,biofortification,leek,selenium speciation,selenate,selenite,HPLC-ICP-MS,BIOAVAILABILITY,VITRO GASTROINTESTINAL DIGESTION,MASS-SPECTROMETRY,LIQUID-CHROMATOGRAPHY,COLON-CANCER,SCHOENOPRASUM,TRANSLOCATION,FISTULOSUM},
  language     = {eng},
  number       = {44},
  pages        = {10930--10935},
  title        = {Fertilizing soil with selenium fertilizers: impact on concentration, speciation, and bioaccessibility of selenium in leek (Allium ampeloprasum)},
  url          = {http://dx.doi.org/10.1021/jf302931z},
  volume       = {60},
  year         = {2012},
}

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