Nutrient Imbalance of the Host Plant for Larvae of the Pale Grass Blue Butterfly May Mediate the Field Effect of Low-Dose Radiation Exposure in Fukushima: Dose-Dependent Changes in the Sodium Content.

摘要: The pale grass blue butterfly Zizeeria maha is sensitive to low-dose radioactive pollution from the Fukushima nuclear accident in field but also highly tolerant cesium (137Cs) an artificial diet laboratory experiments. To resolve this field-laboratory paradox, we hypothesize that shows vulnerability through biochemical changes larval host plant, creeping wood sorrel Oxalis corniculata, response radiation stress. test field-effect hypothesis, examined nutrient contents plant leaves Tohoku (mostly polluted areas including Fukushima), Niigata, and Kyushu, Japan. Leaves showed significantly lower sodium lipid than those Niigata. In samples, content (but not content) was negatively correlated with radioactivity concentration of ground dose. other factors. These results suggest imbalance may be caused by stress one reasons monophagous high mortality morphological abnormalities shortly after Fukushima.