The effect of sulphate on the selenium content of pasture plants

Pratley, JE; McFarlane, JD

doi:10.1071/ea9740533

Cited by 37 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several researchers reported reductions in SeO 4 concentration in plant tissues ranging from 80% to 100% when sulfate level was increased in the growth medium (Leggett and Epstein 1956;Ulrich and Shrift 1968;Ferrari and Renosto 1972;Barak and Goldman 1997). Previous studies also showed that sulfate has a much greater eect on plant uptake of SeO 4 than SeO 3 (Pratley and McFarlane 1974;Gissel-Nielsen 1973). However, other than the results of this study, there are no data available describing the eects of increasing sulfate levels on SeMeth uptake and volatilization by (Abrams et al 1990).…”

Section: Discussioncontrasting

confidence: 56%

“…2, 4; Table 2). Previous research has shown that SeO 4 uptake and volatilization by plants are strongly inhibited by the presence of high concentrations of sulfate in the growth medium (Pratley and McFarlane 1974;Mikkelsen et al 1988;Mikkelsen and Wan 1990;Zayed andTerry 1992, 1994;Barak and Goldman 1997). Antagonistic sulfate/ selenate interactions have generally been reported in single cells, excised roots, and whole plants (Lauchli 1993).…”

Section: Discussionmentioning

confidence: 94%

See 1 more Smart Citation

Accumulation and volatilization of different chemical species of selenium by plants

Zayed

Lytle

Terry

1998

Planta

391

277

View full text Add to dashboard Cite

inhibited SeO 3 and SeMeth uptake by 33% and 15± 25%, respectively, as compared to an inhibition of 90% of SeO 4 uptake. Similar results were observed with regard to sulfate eects on volatilization. We conclude that reduction from SeO 4 to SeO 3 appears to be a ratelimiting step in the production of volatile Se compounds by plants. Inhibitory eects of sulfate on the uptake and volatilization of Se may be reduced substantially if Se is supplied as, or converted to, SeO 3 and/or SeMeth rather than SeO 4 .

show abstract

Section: Discussioncontrasting

confidence: 56%

Section: Discussionmentioning

confidence: 94%

Accumulation and volatilization of different chemical species of selenium by plants

Zayed

Lytle

Terry

1998

Planta

391

277

View full text Add to dashboard Cite

show abstract

“…The close relationship between Se(VI) and SO42-uptake by plants has been observed many times (Gissel-Nielsen et al, 1984;Mikkelsen et al, 1988b;Pratley and McFarlane, 1974). In general, increasing the concentration of SO ]-in the soil solution reduces Se accumulation by plants (Wan et al, 1988).…”

Section: Introductionmentioning

confidence: 93%

Effect of salinity and its composition on the accumulation of selenium by alfalfa

1988

View full text Add to dashboard Cite

Alfalfa (Medicago sativa L.) was grown in greenhouse sand culture to examine the effect of salinity composition and concentration on Se accumulation by plants. In a 2 • 2 x 4 factorial experiment, salinity was added as either C1-or SO~-salts to the irrigating solution to achieve an electrical conductivity of 0.5, 1.5, 3.0, or 6.0dSm -t Selenium was added to the nutrient solution at a concentration of 0.25 or 1.0 mg Se(VI) 1-t. Following the third cutting, the roots were washed and all plant material analyzed for dry weight and Se. Plant biomass production decreased with additions of either Se or salinity, regardless of composition. In the presence of Se, the yield reduction was greater with C1-salinity than with SO~4-salinity. Plant Se accumulation was reduced from 948 mg Se kg-I to 6 mg Se kg -1 in the presence of SO42-salts (0.5mmol SO 2-1 -l vs. 40mmol SO42-1 -t) due to an apparent Se(VI) -SO42-antagonism. This Se-SO 2-antagonism prevented accumulation of Se and reduced Se-induced toxicity. A lesser antagonistic effect on Se accumulation was observed between C1-and Se. A synergistic interaction between SO 2-and Se(VI) increased plant S concentrations in the presence of the relatively low basal SO~-concentrations but not at the higher solution SO 2-concentrations. In many areas, soil and water containing high Se concentrations also contain large amounts of SO~-. The occurrence of SO~-with Se reduces plant accumulation of Se(VI) and may lower the risk of Se overexposure to animals feeding on forage material grown in high Se-SO 2-regions.

show abstract

“…For example, increasing the intake of dietary Zn protects sheep against the onset of Cu toxicity (Bremner et al 1976) and it was suspected that Cu deficiency in sheep grazing near an industrial smelter was probably induced as a result of excessive intakes of Cd and Zn (Koh and Judson 1986). Sulfur and Se are similar chemically and hence are potentially antagonistic in their uptake in plants and their utilisation in animals (Prattley and McFarlane 1974;Pope et al 1979;Abdel-Rahim et al 1985).…”

Section: Dietary Interactionsmentioning

confidence: 99%

Mineral disorders in grazing livestock and the usefulness of soil and plant analysis in the assessment of these disorders

Judson¹,

McFarlane²

1998

Aust. J. Exp. Agric.

View full text Add to dashboard Cite

Summary. This paper briefly describes common mineral disorders affecting livestock at pasture in Australia, their mineral requirements, factors affecting these requirements and laboratory methods of assessing the mineral status of the animal. The benefits and limitations of mineral analyses of soil and pasture samples for the purposes of identifying and preventing mineral disorders of the grazing animal are discussed. Mineral analyses of pasture are of particular value in the identification of the causes of copper and magnesium deficiency and of acute calcium deficiency in livestock. Selective grazing, adventitious ingestion of soil and variability in the mineral reserves of the animal, however, limit the usefulness of pasture analyses to identify a mineral disorder in the grazing animal.

show abstract

The effect of sulphate on the selenium content of pasture plants

Cited by 37 publications

References 12 publications

Accumulation and volatilization of different chemical species of selenium by plants

Accumulation and volatilization of different chemical species of selenium by plants

Effect of salinity and its composition on the accumulation of selenium by alfalfa

Mineral disorders in grazing livestock and the usefulness of soil and plant analysis in the assessment of these disorders

Contact Info

Product

Resources

About