Analyses and countermeasures for decreasing radioactive cesium in buckwheat in areas affected by the nuclear accident in 2011

Kubo, Katashi; Nemoto, Kazutoshi; Kobayashi, Hiroyuki; Kuriyama, Yasushi; Harada, Hirohide; Matsunami, Hisaya; Eguchi, Tetsuya; Kihou, Nobuharu; Ota, Tetsuji; Keitoku, Shoji; Kimura, Takeshi; Shinano, Takuro

doi:10.1016/j.fcr.2014.10.001

Cited by 34 publications

(27 citation statements)

References 18 publications

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“…Grains of nonlodged plants were harvested from 1.5 m 2 area for each plot. Grain samples were collected with threshing and winnowing (TW) from effect on the grain R-Cs concentration compared with lodging because the R-Cs concentration in shoots is not high (Kubo et al, 2015). From these results, we inferred that the reasons for high R-Cs in grain samples from lodged plants were (1) adherence of soil with high R-Cs to grain and/or (2) difference in degree of grain fertility.…”

Section: Resultsmentioning

confidence: 98%

“…The lodging resistance of 'Aizunokaori' is estimated as high because it has short plant height compared with conventional cultivars (Osawa, 2011). Characteristics of the field and experimental design were described in Kubo et al (2015). The lodging of buckwheat in the field was caused by the typhoon No.18 (Man-yi), which had 13.2 m s −1 of the greatest wind velocity in Fukushima prefecture (Japan Meteorological Agency, 2013), in 16 September 2013 (around flowering stage of buckwheat).…”

Section: Resultsmentioning

confidence: 99%

“…Soil R-Cs concentration was 4,085 Bq kg −1 before sowing (Kubo et al, 2015). Buckwheat cultivar 'Aizunokaori' developed in Fukushima prefecture in 2007 (Yamauchi, 2012) was used in the experiment.…”

Section: Resultsmentioning

confidence: 99%

“…A survey of R-Cs of buckwheat grain samples in 2011 (330 samples) and 2012 (2918 samples) revealed that 0.9 and 0.5% of buckwheat samples exceeded 100 Bq kg −1 (the standard limit of radioactive nuclides for food materials from April, 2012), respectively (MAFF, 2013;MHLW, 2012). Since then, countermeasure was rapidly developed to decrease R-Cs in buckwheat grain by the application of potassium (Kubo et al, 2015). No samples from the surveys of 1394 and 848 samples taken respectively in 2013 and 2014 exceeded the standard limit (MAFF 2015a, 2015b).…”

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confidence: 99%

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Decreasing radioactive cesium in lodged buckwheat grain after harvest

Kubo

Kobayashi

Nemoto

et al. 2016

Plant Production Science

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Decreasing radioactive cesium in lodged buckwheat grain after harvest

Kubo

Kobayashi

Nemoto

et al. 2016

Plant Production Science

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“…As a result of increasing potassium (K) applications to decrease RCs transfer from soil to grain, wheat samples that exceed the standard have not been detected since 2012. Increasing K applications has resulted in decreased RCs transfers from the soil to the plants of various species, such as rice (Oryza sativa L.) 12,13 , soybean (Glycine max L.) 14 , buckwheat (Fagopyrum esculentum Moench) [15][16][17][18] and cypress (Chamaecyparis obtusa (Sieb. et Zucc.)…”

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confidence: 99%

Variations in radioactive cesium accumulation in wheat germplasm from fields affected by the 2011 Fukushima nuclear power plant accident

Kubo

Kobayashi

Nitta

et al. 2020

Sci Rep

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Decreasing the transfer of radioactive cesium (RCs) from soil to crops has been important since the deposition of RCs in agricultural soil owing to the Fukushima nuclear power plant accident of 2011. We investigated the genotypic variation in RCs accumulation in 234 and 198 hexaploid wheat (Triticum spp.) varieties in an affected field in 2012 and 2013, respectively. The effects of soil exchangeable potassium (ExK) content to RCs accumulation in wheat varieties were also evaluated. A test field showed fourfold differences in soil ExK contents based on location, and the wheat varieties grown in areas with lower soil ExK contents tended to have higher grain RCs concentrations. RCs concentrations of shoots, when corrected by the soil ExK content, were positively significantly correlated between years, and RCs concentrations of shoots were significantly correlated with the grain RCs concentration corrected by the soil ExK content. These results indicated that there were genotypic variations in RCs accumulation. The grain to shoot ratio of RCs also showed significant genotypic variation. Wheat varieties with low RCs accumulations were identified. They could contribute to the research and breeding of low RCs accumulating wheat and to agricultural production in the area affected by RCs deposition. Radioactive cesium (RCs) isotopes 134 Cs and 137 Cs, which can be incorporated into the food chain, becoming a threat to human health 1 , are two of the major radionuclides released by the accident at the Tokyo Electric Power Company's Fukushima Dai-ichi (No. 1) nuclear power plant (TEPCO's FDNPP), caused by the Great East Japan Earthquake and subsequent tsunami on 11 March 2011 2. They dispersed into the environment, including agricultural land in eastern Japan, leading to concerns regarding the contamination of food with radioactive materials and their effects on human health. The Japanese Ministry of Health, Labor and Welfare established a provisional maximum regulatory value for RCs in agricultural products at 500 Bq kg −1 on 17 March 2011. This was changed to 100 Bq kg −1 on 1 April 2012 3. Although incidents of RCs contamination greater than the regulatory value in agricultural products have been limited 4 , the radioactivity monitoring of agricultural products has continued in the affected areas because of the relatively long half-life (30.2 years) of 137 Cs. Studies and countermeasures to decrease RCs in agricultural products have been important in allowing the resumption of agricultural practices in the areas affected by RCs.

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