ABSORPTION OF RADIONUCLIDES THROUGH THE ABOVE-GROUND PARTS OF PLANTS, WITH SPECIAL REFERENCE TO PRODUCTS OF NUCLEAR FISSION

The above ground, or aerial, parts of plants were found to absorb radionuclides readily from external spray applications. Entry through leaves, stems, fruit, and bark were demonstrated. The rate of absorption, extent of subsequent transport, and pattern of distribution within the plant was found to be dependent upon the nature of the radionuclide and many internal and external factors. These factors are discussed. It is concluded that the above ground parts of plants can absorb radionuclides which occur as fission products in an atomic fall-out, and that the hazard exists that these substances may be incorporated into plant tissues. (C.H.)