Investigations on selenium in wheat

Olson, O. E.; Novacek, E. J.; Whitehead, E. I.; Palmer, I. S.

doi:10.1016/s0031-9422(00)85306-6

Cited by 235 publications

(75 citation statements)

References 15 publications

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“…In plants such as wheat most of the selenium is incorporated into protein as selenomethionine (Olson et al 1970), while in selenium accumulator plants it is in the form of selenocystathionine and selenium methylselenocysteine (Shrift 1969). The selenium of wheat, fish meal and soybean meal produces considerably higher tissue levels of selenium in chicks and poults than equivalent amounts of sodium selenite (Scott and Thompson 1971).…”

Section: Introductionmentioning

confidence: 99%

Comparative effects of barley feed and sodium selenite on selenium levels in hen eggs and tissues

Kääntee¹,

Kurkela²

1980

AFSci

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Abstract. An investigation was made into the effects of barleys with varying levels of selenium, and of sodium selenite, on the selenium content of organs in laying hens (blood, spleen, breast muscle, liver, kidney, lung, heart, gizzard and ovary) and in the yolks and whites of their eggs.The results indicated that grain Se affects the Se level of organs far more than sodium selenite supplementation. The Se concentrations of feed and organs correlate logarithmically, and blood Se in hen is the most reliable indicator of the Se level in other organs.It was typically observed that while variations in grain Se caused similar changes in the Se level of both egg yolk and white, sodium selenite primarily affected the yolk Se level. This contrasting effect is similar to that found in earlier published reports

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Section: Introductionmentioning

confidence: 99%

Comparative effects of barley feed and sodium selenite on selenium levels in hen eggs and tissues

Kääntee¹,

Kurkela²

1980

AFSci

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“…Nonaccumulator plants metabolize much of the Se into proteinbound selenomethionine or selenocystine (Olson et al 1970, Yasumoto et al 1988. Organic Se may be volatilized from shoots, actively excreted from roots of growing plants, or mineralized from decaying vegetation (Abrams et al 1990a).…”

mentioning

confidence: 99%

Selenium Absorption by Two-Grooved Milkvetch and Western Wheatgrass from Selenomethionine, Selenocystine, and Selenite

Williams¹,

Mayland²

1992

Journal of Range Management

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Selenium (Se) occurs in various forms in soils, including inorganic selenite and selenate and organic selenomethionine. Plant uptake of the inorganic, but not the organic forms, has been studied extensively. Organic-Se uptake was therefore examined in two-grooved milkvetch (Astragalus bisulcatus (Hook.) Gray), a Se-accumulating forb, and western wheatgrass (Pascopyrum (Rydb.) Love), a non-Se accumulating grass. Plants were grown for 56 days in nutrient culture enriched with 1 or 2 mg Se literl as sodium selenite or 0.3 or 0.6 mg Se liter-1 as Se-DLmethionine or Se-DL-cystine. Growth was not affected by the Se treatments. Selenium concentrations in shoots were proportional to nutrient-solution concentrations for both species grown in sodium selenite and selenocystine, and for wheatgrass when grown in selenomethionine. Selenium concentrations in milkvetch were not increased by the higher concentration of selenomethionine. Shoots of milkvetch, growing in the low-Se treatment contained 243, 283, and 47 mg Se g-1, for the sodium selenite, selenomethionine, and selenocystine treatments, respectively, whereas values for the wheatgrass were 20, 32, and 17. Shoot:root Se concentrations were 1.2, 0.7, and 0.4 in milkvetch and 0.1, 0.5, and 0.1 in wheatgrass for the sodium selenite, selenomethionine, and selenocystine, respectively. Selenium is more readily transported to shoots in the accumulator plant, or conversely; there is a barrier to Se movement to shoots in the nonaccumulator plant. Wheatgrass contained sufficient Se to be of concern in animal toxicosis and because of greater dry matter yield accumulated as much or more Se than did the milkvetch.

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“…The predominant form of Se in accumulator plant species such as A. bisulcatus is nonprotein, whereas the predominant form in nonaccumulator plant species such as wheat is protein bound. Olson et al (1970) confirmed that much of the Se in naturally seleniferous wheat (up to 31 ppm) occurred in the gluten fraction and almost half was in the form of selenomethionine. Unfortunately, very little information is available concerning the chemical forms of the Se in plant tissues of nonaccumulator species.…”

Section: Discussionmentioning

confidence: 60%

Comparative Toxicity of Selenium from Seleno-DL-methionine, Sodium Selenate, and Astragalus bisulcatus in Pigs

et al. 1996

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Investigations on selenium in wheat

Cited by 235 publications

References 15 publications

Comparative effects of barley feed and sodium selenite on selenium levels in hen eggs and tissues

Comparative effects of barley feed and sodium selenite on selenium levels in hen eggs and tissues

Selenium Absorption by Two-Grooved Milkvetch and Western Wheatgrass from Selenomethionine, Selenocystine, and Selenite

Comparative Toxicity of Selenium from Seleno-DL-methionine, Sodium Selenate, and Astragalus bisulcatus in Pigs

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