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ICRP International

Conference on Recovery After Nuclear Accidents

Radiological Protection Lessons
from Fukushima and Beyond

December 1 - 18, 2020

A.A. Iavniuk, N.L. Shevtsova, D.I. Gudkov

Updated: Dec 11, 2020

The Common Reed’s Seedlings After Long-term Radiation Exposure: Correlation Between Dose Rate and Vitality Indexes

A.A. Iavniuk (National Aviation University, Ukraine), N.L. Shevtsova (NAS, Ukraine), D.I. Gudkov (NAS, Ukraine)


Nowadays, wildlife of Chernobyl Exclusion zone (CEZ) is living in radionuclide contaminated environment. Consequences of this are still uncertain. Aquatic vascular plants are a good object for investigation because of their significant role in radionuclides transfer in ecosystem. Founding correlation between seedling growth disorders and their survivability is a valuable proofing tool for the plant early ontogenesis assessing. Correlations between reed’s seedling geotropism, organogenesis disorders, leaf chlorophyll abnormalities and germs survivability under low radiation dose rates were studied. Reed seeds were sampled from CEZ and reference reservoirs with dose rates of 1.9–34.0 and 0.05–0.25 μGy h−1, respectively. Reliable inverse correlation between total abnormalities number, organogenesis, geotropism disorders and germs survivability was found – r=-0.93, -0.77, -0.85 respectively (p=0.05). Strongly direct correlation between dose and geotropism disorders was found – r=0.78 (p=0.05). Our data suggest aquatic vascular plants suffer significant negative consequences at low dose rates, that previously thought safe.

長期放射線被ばく後のヨシの実生:線量率と活力の指標との相関関係

A.A. Iavniuk (National Aviation University, Ukraine), N.L. Shevtsova (NAS, Ukraine), D.I. Gudkov (NAS, Ukraine)


現在、チェルノブイリの立入禁止区域(CEZ)の野生生物は放射性核種に汚染された環境で生きている。その影響は未だ不明である。水性維管束植物は生態系における放射性核種の移行に重要な役割を果たすために調査対象として適している。苗の成長障害とその生存率との相関関係を確立することが、植物の早期個体発生評価のための貴重な検証ツールである。低放射線線量率下でのヨシの苗の屈地性、器官形成障害、葉緑素異常、胚芽の生存率の相関が調査された。ヨシの種子がCEZ及び線量率がそれぞれ1.9~34.0及び0.05~0.25 μGy h-1の基準貯水池から採取された。その結果、全異常数、器官形成、屈地性障害、胚芽生存率の間には、それぞれr = - 0.93、- 0.77、- 0.85(p = 0.05)の信頼できる逆相関が認められた。線量と屈地性障害との間には強い正相関が見られ、r = 0.78(p = 0.05)であった。このデータはこれまで安全と考えられていた低線量率でも、水生維管束植物が大きな悪影響を受けることを示唆している。

Paper-C59_AAIavniuk-etal
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