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- W2948984612 abstract "The accident at Fukushima 1 Nuclear Power Plant in 2011 caused contamination by radioactive cesium (¹³⁴Cs and ¹³⁷Cs) in surrounding areas. After this accident, concerns about Cs contamination, including food safety, have limited industrial activities and reconstruction in Fukushima. Sorghum (Sorghum bicolor (L.) Moench) is an annual C₄ crop that can be used as biofuel feedstock due to its high biomass. Use of Cs-contaminated fields to produce biofuel feedstock would be more acceptable than use for food or feed crops due to the lower risk of human internal exposure to radioactive Cs. In addition, high-biomass sorghum might be suitable for removal of Cs from fields (phytoremediation). For both applications, it is important to use accessions showing the appropriate level of accumulation of radioactive Cs (low for biofuel feedstock, high for phytoremediation). Here, we examined the accumulation of radioactive Cs in the aerial parts of 56 sorghum accessions grown in Fukushima. Accessions were cultivated in a low-level-contaminated field in 2011 and in a highly contaminated field in a planned evacuation zone in 2012. After cultivation, activity concentrations from ¹³⁴Cs and ¹³⁷Cs were measured in the aerial plant parts. In 2011, the activity concentrations of ¹³⁴Cs and ¹³⁷Cs were 58.2–350 and 58.6–450 Bq kg⁻¹ dry weight, respectively. In 2012, the concentrations of ¹³⁴Cs and ¹³⁷Cs were 54.2–1320 and 57.1–1960 Bq kg⁻¹ dry weight, respectively. Relative to the median values of the accessions grown each year, 3 showed lower activity concentrations and 2 showed higher activity concentrations of radioactive Cs under both cultivation conditions. In contrast to a previous report, there was no significant correlation between biomass and Cs activity concentration. Because both biomass and Cs concentration are important in classifying accessions for use in phytoremediation, we also calculated the Cs accumulation index (single-plant biomass × Cs activity concentration) for each accession. The accession AKLMOI WHITE showed the highest values in both years, suggesting that this accession has the high per-plant accumulation capacity for radioactive Cs. Our data collected from actual contaminated fields is irreplaceable for choosing sorghum accessions for cultivation in Cs-polluted sites such as Fukushima." @default.
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- W2948984612 date "2019-05-04" @default.
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- W2948984612 title "Accumulation of radioactive cesium in sorghum (<i>Sorghum bicolor</i> (L.) Moench) accessions cultivated in Fukushima in 2011 and 2012" @default.
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- W2948984612 doi "https://doi.org/10.1080/00380768.2019.1615385" @default.
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