Radioactive cesium absorption and accumulation in the root system of a perennial weeds

2016 Fiscal Year Final Research Report

• Project/Area Number: 25850012
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Crop production science
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: Yoshino Namiko 国立研究開発法人農業・食品産業技術総合研究機構, 東北農業研究センター, 主任研究員 (20568547)
• Research Collaborator: MATSUNAMI Hisaya 国立研究開発法人農業・食品産業技術総合研究機構, 東北農業研究センター農業放射線研究センター, 上級研究員 (80504068)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 放射性セシウム / スギナ / 根系

Outline of Final Research Achievements

Equisetum arvense L., a perennial weed, has a rhizomatous root system that is the deepest among the farmland weeds. The present study investigated the accumulation of radioactive materials in the root system of E. arvense by soil layer investigation in the farms of Fukushima Prefecture.
The concentration of radioactive cesium in both the root system of E. arvense and the soil decreased with sampling depth. However, this decrease was more moderate in the root system of E. arvense than in the soil. The concentration of radioactive cesium in the roots of E. arvense was similar to that in the soil at the depth of 40 - 50 cm. Radioactive cesium appeared to accumulate in the root system at a specific depth by absorption from the surrounding soil at the same depth and vertical movement within the root system. However, the radioactive material in E. arvense had little effect on the surrounding soil, because the mass of E. arvense was extremely small.

Free Research Field

雑草学、特に放射性物質と雑草に関する研究および被災地の雑草防除に関する研究