Uptake of radioactive strontium and cesium in rice plants. I. Accumulation of Sr and Cs in rice grains through roots
Water-cultured rice plants were exposed to /sup 89/Sr or /sup 137/Cs through roots for five days at their various growth stages and continued to grow until harvest. The harvested grains were radiochemically analyzed and the concentration factors were calculated. The maximum uptake of /sup 137/Cs in the grains was found at the booting stage, while that of /sup 89/Sr was at the flowering stage. The Cs uptake was 400 times higher at the booting stage, and 30 times at the flowering stage than those with Sr. The growth stage dependency of the uptake of Sr and Cs was the most important factor for a selective enrichment of Cs in rice grains. The specific affinity of Cs to cell sap and that of Sr for membrane substances of rice grains probably caused a selective redistribution inside the plant body. (auth)
- Research Organization:
- National Inst. of Agricultural Sciences, Tokyo
- NSA Number:
- NSA-29-008102
- OSTI ID:
- 4364410
- Journal Information:
- J. Radiat. Res., v. 14, no. 1, pp. 31-39, Journal Name: J. Radiat. Res., v. 14, no. 1, pp. 31-39; ISSN JRARA
- Country of Publication:
- Japan
- Language:
- English
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