TY - JOUR

T1 - Thorium uptake by wheat at different stages of plant growth

AU - Shtangeeva, I.

AU - Ayrault, S.

AU - Jain, J.

PY - 2005/4/8

Y1 - 2005/4/8

N2 - Data on biogeochemistry of thorium are rather limited. So far little is known about toxic effects of small amounts of the radionuclide on higher plants. In this study the uptake of thorium by wheat seedlings was measured by greenhouse experiments. Germination of wheat seeds for 6 days in the presence of thorium resulted in accumulation of the metal in all parts of the seedlings. When the Th-rich seedlings were transferred to normal soil and were grown there further for 7 days, Th concentrations in roots and leaves decreased significantly (in leaves the Th content decreased up to the level of Th in the control plants). In seeds, however, Th content remained unchanged. An increase of Th content in roots and seeds was also observed as a result of addition of thorium to soil but in this case the concentration of Th in leaves did not change. The accumulation of Th in plants affected the uptake of other elements including essential macro-nutrients. The most strongly affected part of the plants was leaf.

AB - Data on biogeochemistry of thorium are rather limited. So far little is known about toxic effects of small amounts of the radionuclide on higher plants. In this study the uptake of thorium by wheat seedlings was measured by greenhouse experiments. Germination of wheat seeds for 6 days in the presence of thorium resulted in accumulation of the metal in all parts of the seedlings. When the Th-rich seedlings were transferred to normal soil and were grown there further for 7 days, Th concentrations in roots and leaves decreased significantly (in leaves the Th content decreased up to the level of Th in the control plants). In seeds, however, Th content remained unchanged. An increase of Th content in roots and seeds was also observed as a result of addition of thorium to soil but in this case the concentration of Th in leaves did not change. The accumulation of Th in plants affected the uptake of other elements including essential macro-nutrients. The most strongly affected part of the plants was leaf.

KW - Macro-nutrients

KW - Thorium

KW - Toxic effects

KW - Trace elements

KW - Wheat seedlings

UR - http://www.scopus.com/inward/record.url?scp=15744405308&partnerID=8YFLogxK

U2 - 10.1016/j.jenvrad.2004.01.041

DO - 10.1016/j.jenvrad.2004.01.041

M3 - Article

C2 - 15795040

AN - SCOPUS:15744405308

VL - 81

SP - 283

EP - 293

JO - Journal of Environmental Radioactivity

JF - Journal of Environmental Radioactivity

SN - 0265-931X

IS - 2-3

ER -