Translocation, accumulation and distribution of 137Cs in spring wheat after foliage contamination

The foliage absorption of 137Cs by spring wheat and the accumulation and distribution of 137Cs in non-contaminated parts of the plant were studied. The results showed that there was a linear relationship between the content of 137Cs and the amount of the contamination in each part of the plant. The distribution of 137Cs in each part of the plant was related with the phyllotaxis of the contaminated leaf, but the majority of 137Cs in the ear was distributed in the husk. The accumulation of 137Cs in non-contaminated leaves gradually decrease with the increasing of the relative phyllotaxy distance between non-contaminated leaves and the contaminated leaf. The order of the specific activity of 137Cs is the leaf>the stem>the ear in the tillering. The translocation rate of 137Cs to seeds is in direct proportion to physiological metabolic activity of the treated leaf and is also related to its phyllotaxis. (11 tabs., 4 figs.)