Welcome Workshop for Tondel-san’s visit in Osaka
April 21, 2019
Maru-biru Bekkan, Shin-Osaka

Various effects observed on animals
and plants around Fukushima after
the FDNPP accident
Imanaka T.
Institute for Integrated Radiation and Nuclear ScienceKyoto University

Basic motivation for presentation
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Various effects on birds and wild mice etc havebeen reported around Chernobyl.
However, it seemed to be difficult to conclude
something from ecological observations.
Several studies at the early stage after theFukushima accident indicated something
shocking to me on animals.
Anyway, we have to collect data and record
what occurred in the environment after theFukushima NPP accident.
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Today’s topics
1. Mutation/modification of blue butterfly,
SHIJIMICHO.
- Research by a group of Ryukyu University.

2. Mutation/modification of aphid, WATAMUSHI.
- Research by a group of Hokkaido University.

3. Mutation/modification of fir trees, MOMINOKI.
-Research by a group of NIRS.

4. Mutation/modification of Japanese monkeys.
-Research by groups of Veterinary Univ and Tohoku
Univ.

5. Our experiment using rice, NIPPONBARE.
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Blue butterfly, YAMATO-SHIJIMI

Scientific Reports 2012

Observation in May 2011

Hiyama et al, Scientific Reports 2012

Observation of abnormality in May 2011

Hiyama et al, BMC Evolutionary Biology 2015

Abnormality tends toward normal after
two years later

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Ecology and Evolution 2014

Abnormality of aphid in 20127

Akimoto et al, J Heredity 2018

Experiment at my lab, irradiating
aphid eggs for three months inwinter 2015.
A small earlier hatching was observed
for the irradiated group of eggs.

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Ochiai et al,
Scientific Reports 2014

Monkeys were captured
around Fukushima city
between April 2011 andJune 2012.

Decreasing tendency ofWBCC was observed withincreasing radio-caesium
concentration in muscle.
9Hayama et al,
Scientific Reports 2017

▲ Ｂｅｆｏｒｅ the accident● After the accident

Slower development ofmonkey fetuses wasobserved after the accident
than observed before.

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Urushihara et al,
Scientific Reports 2018

Histological image of bone marrow

Extraordinary degenerationof born marrow wasobserved in the righthighly-contamination case.
Male, 9 yr old.
Captured in Aug 2013
Cs134+137 in muscle: 479 Bq/kg

Female, 8 yr old.
Captured in Jan 2014
Cs134+137 in muscle: 11,400 Bq/kg

Watanabe et al, Scientific Reports 2015

Abnormal frequency increased
with the level of contamination.

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Our previous experiment observing gene expression in rice leaves
after exposing low level gamma-ray from Cs-137 of 40 Gy/day

Expression of stress-related genes significantly increased after 72 hr
Cs-137 gamma-ray exposure of 40 Gy/day.

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After the Fukushima accident, we did experiment using Iitate
village as artificial gamma-ray field for rice gene expression
Hayashi et al,J Heredity 2014

３ levels of exposure rate:
H: ～100 Sv/day
M： ～60 Sv/day
L： ～40 Sv/day

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Temporal expression pattern of 22 genes

OsPR10a: stress-related gene

Gene expression is very sensitive and complicated being affected by various
environmental factor. It seems to be a difficult task to draw something
conclusive from one or two experiments.

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Anyway, we have to continue our works to record
what is happening around Fukushima-1st workshop. August 10-11, 2014. KUR Kumatori-2nd workshop. August 10-11, 2015. KUR Kumatori
https://www.rri.kyoto-u.ac.jp/PUB/report/04_kr/img/ekr004.pdf-3rd workshop. August 3-4, 2016. KUR Kumatori
https://www.rri.kyoto-u.ac.jp/PUB/report/04_kr/img/ekr015.pdf-4th workshop. August 2-3, Tokusyu-kai, Narita-5th workshop. August 3-4, Tokyo Univ, Tokyo●Special issue of J. Radiation Research, 2015
https://academic.oup.com/jrr/issue/56/suppl_1●Springer book “Low-Dose-Rate Radiation Effects on Animals andEcosystem -Long-Term Study on the Fukushima Daiichi Nuclear Power
Plant Accident” (to be published on-line soon)
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