The comparative uptake and translocation by plants of calcium, strontium, barium and radium
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Calcium, strontium, barium, Ra228 and Ra226 were measured in tissues of the Brazil nut tree from different areas; ammonium acetate extracts of the underlying soil were also examined. The concentrations of radium found in the leaves and fruit were higher than had been previously reported, the highest values (up to 6600 Pc Ra226/kg) occurring in the endosperm; the soils, however, did not contain abnormally high levels of radioactivity. Strontium and barium also accumulated in the endosperm, and the ratios of all the heavy alkaline earth ions to calcium in this tissue were 20 times higher than in some stem tissues.
Evidence is presented that the time taken for the transfer of the heavy alkaline earths from roots to shoots was very short compared with the age of the trees. Specific chelation of these ions is suggested as a possible explanation of the abnormally high concentrations occurring in the fruit.
KeywordsBarium Strontium Bark Soil Extract Mature Fruit
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- 1.Biddulph, O., Translocation of inorganic solutes.In Plant Physiology Vol.II, edited by F. C. Steward, Academic Press, New York (1959).Google Scholar
- 2.Bowen, H. J. M. and Cawse, P. A., The determination of inorganic elements in biological tissue by activation analysis. U.K. Atomic Energy Authority Report AERE-R 4309 (1963).Google Scholar
- 3.Bowen, H. J. M. and Dymond, J. A., Strontium and barium in plants and soils. Proc. Roy. Soc., B.144, 355–368 (1955).Google Scholar
- 4.Bradshaw, A. D., McNeilly, T. S. and Gregory, R. P. G., Industrialization, evolution and the development of heavy metal tolerance in plants.In Ecology and the Industrial Society, edited by G. T. Goodman, R. W. Edwards and J. M. Lambert, Blackwell's, Oxford, pp. 327–343 (1965).Google Scholar
- 7.Hansen, R. O., Dios Vidal, R. and Stout, P. R., Radioisotopes in soils: physicochemical composition.In Radioisotopes in the Biosphere, edited by R. S. Caldecott and L. A. Snyder, Univ. of Minnesota, Minneapolis, pp. 23–36 (1960).Google Scholar
- 12.Martin, R. P., Newbould, P. and Russell, R. S., Discrimination between strontium and calcium in plants and soils.In Radioisotopes in Scientific Research4, edited by R. C. Extermann, Pergamon Press, London, pp. 173–190 (1958).Google Scholar
- 15.Millikan, C. R. and Hanger, B. C., Effects of chelation and of certain cations on the mobility of foliar-applied45Ca in stock, broad bean, peas, and subterranean clover. Australian J. Biol. Sci.18, 211–226 (1965).Google Scholar
- 16.Mistry, K. B., Behaviour of radium in plants and soils — preliminary studies. Agricultural Research Council Radiobiological Laboratory Report ARCRL10, 86–89 (1963).Google Scholar
- 17.Newbould, P., Some effects of calcium on the uptake of other ions by plants grown in soil. D. Phil. Thesis, Univ. Oxford (1957).Google Scholar
- 18.Penna-Franca, E., Fiszman, M., Lobao, N., Costa Ribeiro, C., Trindade, H., Dos Santos, P. L. and Batista, D., Radioactivity of Brazil nuts. Health Phys.14, 95–99 (1968).Google Scholar
- 19.Robinson, W. O., Whetstone, R. R. and Edgington, G., The occurrence of barium in soils and plants. Tech. Bull. U.S. Dept. Agr. No.1013 (1950).Google Scholar
- 20.Russell, R. S., Schofield, R. K. and Newbould, P., The availability to plants of divalent cations in the soil. Proc. 2nd Int. Conf. Peaceful Uses of Atomic Energy27, 146–148 (1958).Google Scholar
- 22.Smith, K. A. and Mercer, E. R., The determination of radium-226 and radium-228 in soils and plants, using radium-225 as a yield tracer. J. Radioanal. Chem.5, 303–312 (1970).Google Scholar
- 25.United Nations, Report of Scientific Committee on the Effects of Atomic Radiation, 21st Session, Suppl. No.14 (A/6314), New York (1966).Google Scholar