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Composition of hydroponic medium affects thorium uptake by tobacco plants

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    0399221 - ÚEB 2014 RIV GB eng J - Journal Article
    Soudek, Petr - Kufner, Daniel - Petrová, Šárka - Mihaljevič, M. - Vaněk, Tomáš
    Composition of hydroponic medium affects thorium uptake by tobacco plants.
    Chemosphere. Roč. 92, č. 9 (2013), s. 1090-1098. ISSN 0045-6535. E-ISSN 1879-1298
    R&D Projects: GA MŠk LH12162; GA MŠk(CZ) LD13029; GA MPO FR-TI3/778
    Institutional research plan: CEZ:AV0Z50380511
    Keywords : Thorium * Plant uptake * Polyamines
    Subject RIV: DN - Health Impact of the Environment Quality
    Impact factor: 3.499, year: 2013

    The ability of thorium uptake as well as responses to heavy metal stress were tested in tobacco cultivar La Burley 21. Thorium was accumulated preferentially in the root system. The presence of citric, tartaric and oxalic acids in hydroponic medium increased thorium accumulation in all plant organs. On the other hand, the addition of diamines and polyamines, the important antioxidants in plants, resulted in decrease of thorium accumulation, especially in the root system. Negative correlation was found between putrescine concentration and thorium accumulation. Nevertheless, the most important factor influencing the accumulation of thorium was the absence of phosphate ions in a hydroponic medium that caused more than 10-fold increase of thorium uptake in all plant parts. Accumulation and distribution of thorium was followed in six cultivars and 14 selected transformants. Cultivar La Barley 21 represented an average between the tested genotypes, having a very good distribution ratio between roots, stems and leaves.
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