Abstract
The effects of Ni(NO3)2 and Pb(NO3)2 on Amaranthus sp. L. root growth and the effect of calcium on heavy metal (HM) accumulation in the growing root zone and root growth inhibition were studied. The seeds were germinated in the Pb(NO3)2 solutions at concentrations of 50, 100, 200, 500 and 700 μM or Ni(NO3)2 solutions at concentrations of 10, 50, 70, 100, and 500 μM in the presence of 100 μM Ca(NO3)2 or without it. HM toxicity was assesses in 7 days after seed sowing by the root length. Distribution of HM over the tissues of the growing root part was examined histochemically. Ni was more toxic to root growth than Pb. In the presence of Ca, Ni and Pb accumulation in the amaranth root growing part increased markedly, and this enhanced their growth-inhibitory of action. A comparison of results obtained in this work and available from the literature permitted a conclusion that the routes of HM penetration into the root differ in different plant species, and this determines ambiguity of protective Ca action.
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Abbreviations
- HM:
-
heavy metals
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Original Russian Text © I.V. Seregin, A.D. Kozhevnikova, 2009, published in Fiziologiya Rastenii, 2009, vol. 56, No. 1, pp. 92–96.
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Seregin, I.V., Kozhevnikova, A.D. Enhancement of nickel and lead accumulation and their toxic growth-inhibitory effects on amaranth seedlings in the presence of calcium. Russ J Plant Physiol 56, 80–84 (2009). https://doi.org/10.1134/S1021443709010129
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DOI: https://doi.org/10.1134/S1021443709010129