Journal of Plant Research

, Volume 127, Issue 1, pp 5–10 | Cite as

Radioactive pollution and accumulation of radionuclides in wild plants in Fukushima

  • Tetsuro Mimura
  • Mari Mimura
  • Daisuke Kobayashi
  • Chiyo Komiyama
  • Hitoshi Sekimoto
  • Masaaki Miyamoto
  • Akira Kitamura
JPR Symposium Current status and future control of cesium contamination in plants and algae in Fukushima

Abstract

The radionuclide status of wild plants and soil in the Fukushima area was investigated during the period May 2011 to October 2012, using an imaging plate (autoradiograms) or a high purity germanium detector. Analyses of autoradiograms showed that wild plants grown in March 2011 were strongly polluted with fallout released from the Fukushima 1 Nuclear Power Plant. The radioactivity was mostly due to fallout adsorbed on the surface of the plants. On the other hand, a number of herbaceous plants were regularly collected in the Fukushima area and their radionuclide concentrations were measured with a high-purity germanium detector. Plants grown in March 2011 showed very high levels of 134Cs and 137Cs, but these radioactivity levels decreased rapidly after July 2011 and eventually became lower than that of endogenous 40K. During this period, the radioactivity of the soil remained high. We therefore suppose that a significant proportion of the radioactivity detected from plants harvested after July 2011 was most likely derived from soil dust attached on the plant surface. Autoradiograms of rice plants were virtually identical between plants cultivated in Fukushima and Osaka area, reflecting the background radiation due to 40K.

Keywords

Contamination of wild plants 137Cs 134Cs Fukushima Daiichi Nuclear Power Plant Radionuclides 

Abbreviation

F1NPP

Fukushima 1 Nuclear Power Plant

Notes

Acknowledgments

We thank Mr. Toshiyasu Okochi, Family Ouchi and Ms. Kazumi Tsutsui for their kind permission to collect plant and soil samples from their fields. We are grateful to Dr. Robert Reid, The University of Adelaide, Australia, for his kind assistance with the English text. The present work was supported in part by a grant from the Mitsui & Co., Ltd. Environment Fund, a grant from Japan Society for the Promotion of Science and a grant from the Ministry of Education, Culture, Sports, Science and Technology of Japan (Grant-in-Aid no. 24110007).

Supplementary material

10265_2013_599_MOESM1_ESM.doc (50 kb)
Supplementary material 1 (DOC 49 kb)

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Copyright information

© The Botanical Society of Japan and Springer Japan 2013

Authors and Affiliations

  • Tetsuro Mimura
    • 1
  • Mari Mimura
    • 1
  • Daisuke Kobayashi
    • 2
  • Chiyo Komiyama
    • 3
  • Hitoshi Sekimoto
    • 4
  • Masaaki Miyamoto
    • 5
  • Akira Kitamura
    • 3
  1. 1.Department of Biology, Graduate School of ScienceKobe UniversityKobeJapan
  2. 2.Cellular and Integrative Physiology, School of MedicineFukushima Medical UniversityFukushimaJapan
  3. 3.Department of Marine Engineering, Graduate School of Maritime SciencesKobe UniversityKobeJapan
  4. 4.Faculty of AgricultureUtunomiya UniversityUtunomiyaJapan
  5. 5.Radioisotope Division, Center for Supports to Research and Educational ActivitiesKobe UniversityKobeJapan

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