RRC ID 64953
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.
ジャーナル Sci Rep
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