ABSORPTION OF RADIONUCLIDES BY ABOVEGROUND PLANT PARTS AND MOVEMENT WITHIN THE PLANT
The aboveground pants of plants readily absorb radionuclides from external spray applications. Entry occurs through the leaves, stem, fruit, and bark. The rate of absorption, extent of subsequent transport, and pattern of distribution within the plant is dependent upon the nature of the radionuclide and many internal and external factors. Not only are radionuclides absorbed by aboveground plant parts, but they may be lost therefrom into the external environment from leaching induced by rain and dew. Both acropetal and basipetal transport occur following application of P/sup 32/, K/sup 42/, Rb/sup 86/, and Cs/ sup 137/ to aerial plant pants. This is in marked contrast to Ca4/sup 45/, Sr/ sup 89/, Sr/sup 90/-Y/sup 90/, Ru/sup 103/, and Ba/sup 140/. These latter radionuclides do not move freely from the absorbing aerial organ (leaf, fruit), and basipetal transpont is negligible. The hazard exists that fission product radionuclides may be directly incorporated into plant tissues. (auth)
- Research Organization:
- Michigan State Univ., East Lansing
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-014109
- OSTI ID:
- 4054137
- Journal Information:
- J. Agr. Food Chem., Journal Name: J. Agr. Food Chem. Vol. Vol: 9
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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