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  • 1
    Electronic Resource
    Electronic Resource
    Studies on mobilization of chromium with reference to its plant availability – Role of organic acids (1999)
    Springer
    BioMetals 12 (1999), S. 201-207 
    Details
    ISSN: 1572-8773
    Keywords: organic acids ; complexation ; CrIII ; solubilization ; maize plant ; chromium enrichment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Metal-organic acid interactions with special reference to their plant availability have been studied. The role of organic acids in the mobilization of Cr by converting it into labile organically bound form, enhancing its availability, is highlighted. Pot experiments are conducted to investigate the effect of various organic acids on the uptake and translocation of root absorbed trivalent and hexavalent chromium by maize (z. mays) plants grown in sand and soil culture. Statistically significant increases in chromium accumulation from CrIII-treated plants in the presence of increasing concentrations of organic acid suggest the existence of CrIII – organic acid interactions in the soil plant system. In order to support the above mentioned hypothesis of formation of organically bound CrIII in the presence of various organic acids (carboxylic and amino acids), separate experiments have been performed to synthesize and estimate its respective organically bound forms. Amendments with organic acids, however, do not appear to markedly affect chromium accumulation from CrVI treatment. The results are discussed on the basis of the potential of organic acids to form complexes with CrIII.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009262609373
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  • 2
    Electronic Resource
    Electronic Resource
    Chromium mobilization and plant availability — the impact of organic complexing ligands (1999)
    Springer
    Plant and soil 212 (1999), S. 201-206 
    Details
    ISSN: 1573-5036
    Keywords: complexation ; CrIII ; organic acids ; root exudates ; solubilization ; tomato
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Pot experiments were conducted to investigate the effect of various organic acids (carboxylic and amino acids) on the uptake and translocation of root-absorbed trivalent chromium by tomato ( Lycopersicum esculentum) plants grown in sand and soil culture. Statistically significant increases in chromium accumulation from Cr(III) treated plants in the presence of increasing concentrations of organic acid suggest the existence of Cr(III) — organic acid interactions in the soil-plant system. However, the amino acids have been less effective in the mobilization of chromium compared to carboxylic acids. The results are discussed on the basis of the potential of organic acids to form complexes with Cr(III).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004691217480
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    Paper (German National Licenses)
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