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  • 1
    Publication Date: 1989-06-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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  • 2
    Publication Date: 1986-02-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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  • 3
    Publication Date: 1985-10-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 117 (1989), S. 129-133 
    ISSN: 1573-5036
    Keywords: Co-transport-substance ; glucose ; gramicidin ; selenite uptake ; selenite distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Three hours after the absorption of selenite by the roots ofPhaseolus vulgaris a major part of the Se accumulates in the roots while the fraction conveyed towards the aerial organs is unevenly distributed. Uptake and distribution are enhanced when plants are kept in darkness or when the nutritive solution is supplied with glucose, suggesting an active transport of selenite. However, when roots are soaked in a low temperature solution or supplied with metabolic inhibitors, the level of Se decreased by about 35% in the roots and in the aerial organs. So, part of the selenite enters the roots by diffusion, while another part is metabolically linked. Sugar translocated from the leaves is implicated as a co-transport-substance for selenite. Antibiotics, such as gramicidin, synthetised by micro-organisms, can also increase the level of Se within the bean plant.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 92 (1986), S. 29-36 
    ISSN: 1573-5036
    Keywords: Al ; Distribution ; Eléments ; Fe ; Feuilles ; P ; Racines ; Se ; Trifolium repens ; A1 ; Distribution ; Elements ; Fe ; Leaves ; P ; Roots ; Se ; Trifolium repens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Sandy clay loam soils in the La Roche-Posay area, and the different parts ofTrifolium repens growing on 9 locations, were analyzed for their contents of selenium and 16 other elements. The level of K, P, Se in the young leaves was 2 or 3 times higher than in the old organs. The roots showed the lowest contents for these three elements. By contrast, their content of Al, Fe, As were 10 times higher than in the young leaves. When the content of Se in leaves and roots was low, the contents of P, Al and Fe increased with increasing contents of Se. When the level of Se was high, the reverse was the case.
    Notes: Résumé Nous avons analysé les teneurs en sélénium et en seize autres éléments minéraux dans des sols sablo-argileux de la région de La Roche-Posay (France) ainsi que celles des différents organes de 9 lots deTrifolium repens collectésin situ. Les jeunes feuilles accumulent 2 à 3 fois plus de K, P et Se que les organes agés. Le système radiculaire constitute l'une des parties les moins bien pourvues en ces trois éléments. Inversement avec une teneur près de 10 fois supérieure à celle des jeunes feuilles, les racines retienent une forte proportion de Al, Fe et As. Compte tenu d'une concentration croissante en Se dans le feuillage et les racines, il s'avère qu'aux plus faibles teneurs correspondent parallèlement des augmentations de concentrations en P, Al et Fe alors qu'elles s'effondrent aux plus forts niveaux de Se. Le phosphore est l'élément le moins sensible à ces fluctuations.
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  • 6
    ISSN: 1573-5036
    Keywords: Argile ; Corrélation ; Eléments ; Helminthia echioides ; Sélénium ; Trifolium repens ; Clay loam ; Correlation ; Elements ; Helminthia echioïdes ; Selenium ; Trifolium repens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Clay loam soils on La Roche-Posay area andHelminthia echioïdes andTrifolium repens growing on them were analyzed for selenium content. On thirty sites, total soil Se concentration varied from 1.7 to 4.5 ppm and soil pH varied from 6.1 to 7.2. The selenium content in plants was high: from 2 to 32.5 ppm, but showed no correlation with soil pH or with total Se content in soil. Both species were also analyzed for their sixteen element contents. They contained high concentrations of Al, Fe, Ni, Co and Cr. The higher Se contents were found in plants presenting the lower Al, Fe, As and Mn levels. In Trifolium, the Se content showed a negative correlation with the concentration of Al (r=−0.44), of Fe (r=−0.47) and of As (r=−0.47). Moreover, there were high positive correlations between the levels of Al, Fe and As in both species. A positive correlation between the concentration of Se and P was seen for Helminthia, but for Trifolium, the lower concentrations of Se were noted both in samples that had the lower and the higher levels of P. Some other positive correlations were noted between Se concentrations and those of Co, Mo or Mn when it is present in relatively high amounts in the plant species.
    Notes: Résumé Nous avons analysé la teneur en sélénium de sols argileux de la région de La Roche-Posay ainsi que celle deHelminthia echioïdes etTrifolium repens qui s'y développent. Sur trente emplacements, la concentration en Se total du sol varie de 1,7 à 4,5 ppm et le pH oscille de 6,1 à 7,2. La teneur en sélénium des plantes est élevée: de l'ordre de 2 à 32,5 ppm, mais aucune corrélation n'a été notée entre ces valeurs et d'une part le pH du sol ou d'autre part la teneur totale en Se du sol. Seize éléments minéraux ont également été dosés. Les deux espèces présentent des concentrations élevées en Al, Fe, Ni, Co et Cr. Les Teneurs les plus fortes en Se ont été retrouées dans les plantes possédant les taux les plus bas en Al, Fe, As et Mn. Chez Trifolium, une corrélation négative est observée entre la concentration en Se et celle en Al (r=−0,44), en Fe (r=−0,47) et en As (r=−0,47). Par ailleurs, des corrélations positives sont obtenues entre les teneurs en Al, Fe et As chez les deux espèces. Une corrélation positive existe entre la teneur en Se et celle en P chez Helminthia, mais chez Trifolium les plus faibles concentrations en Se se retrouvent à la fois dans les échantillons présentant les niveaux les plus faibles et les plus forts en P. Chez l'une ou l'autre des espèces étudiées, des corrélations positives apparaissent entre les teneurs en Se et celles en Co, Mo ou même Mn lorsqu'il est présent à des taux relativement élevés dans la plante.
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