RRC ID |
64953
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著者 |
Tanaka S, Kinouchi T, Fujii T, Imanaka T, Takahashi T, Fukutani S, Maki D, Nohtomi A, Takahashi S.
|
タイトル |
Observation of morphological abnormalities in silkworm pupae after feeding 137CsCl-supplemented diet to evaluate the effects of low dose-rate exposure.
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ジャーナル |
Sci Rep
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Abstract |
Since the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, morphological abnormalities in lepidopteran insects, such as shrinkage and/or aberration of wings, have been reported. Butterflies experimentally exposed to radiocesium also show such abnormalities. However, because of a lack of data on absorbed dose and dose-effect relationship, it is unclear whether these abnormalities are caused directly by radiation. We conducted a low dose-rate exposure experiment in silkworms reared from egg to fully developed larvae on a 137CsCl-supplemented artificial diet and estimated the absorbed dose to evaluate morphological abnormalities in pupal wings. We used 137CsCl at 1.3 × 103 Bq/g fresh weight to simulate 137Cs contamination around the FDNPP. Absorbed doses were estimated using a glass rod dosimeter and Monte Carlo particle transport simulation code PHITS. Average external absorbed doses were approximately 0.24 (on diet) and 0.016 mGy/day (near diet); the average internal absorbed dose was approximately 0.82 mGy/day. Pupal wing structure is sensitive to radiation exposure. However, no significant differences were observed in the wing-to-whole body ratio of pupae between the 137CsCl-exposure and control groups. These results suggest that silkworms are insensitive to low dose-rate exposure due to chronic ingestion of high 137Cs at a high concentration.
|
巻・号 |
10(1)
|
ページ |
16055
|
公開日 |
2020-9-29
|
DOI |
10.1038/s41598-020-72882-y
|
PII |
10.1038/s41598-020-72882-y
|
PMID |
32994421
|
PMC |
PMC7524783
|
MeSH |
Animals
Bombyx / metabolism*
Butterflies
Cesium / metabolism
Cesium Radioisotopes / adverse effects*
Cesium Radioisotopes / metabolism
Chlorides / metabolism
Diet
Dietary Supplements
Fukushima Nuclear Accident
Insecta
Japan
Nuclear Power Plants
Pupa / metabolism
Radiation Exposure / adverse effects*
Radiation Monitoring / methods
Soil Pollutants, Radioactive / analysis
|
IF |
3.998
|
リソース情報 |
カイコ |
NB2 |