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<p>To investigate the impact of low-dose radiation from fallout from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident on plants, inflorescences of Somei-yoshino cherry trees (Cerasus × yedoensis) were collected just before blooming from 2014 to 2021 at three locations: Tsushima Elementary School (TE), Tsushima Junior High School (TJ), and Namie High School (NH) in the Tsushima area of Namie town, Fukushima Prefecture. The immature pollen ratio (IPR) was examined. We modeled the annual changes in spatial dose rates (SDR) and the IPR to verify whether SDR affected the IPR. Our results showed that the low-dose radiation from FDNPP accident increased IPR in Somei-yoshino cherry trees at the study sites in Fukushima Prefecture. The relative increase of IPR was highest in the range from 30 to 60% in 2014, when the SDR was at its highest, and then decreased to 20–40% with the decline in the SDR in 2016, and remained in 15 to 35% range thereafter. The increase of IPR at the Fukushima sites over the extended period of time suggests negative impacts on pollen formation in other perennial species and accordingly long-term cumulative effects on biodiversity across the affected region.</p> Graphical Abstract <p></p>

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Effect of low-dose radiation from the Fukushima Daiichi Nuclear Power Plant accident on cherry blossom pollen formation

  • 期刊论文

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  • 发表日期：

    2025年6月23日

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  • Nobuyoshi Nakajima,
  • Kazuhiko Kobayashi,
  • Masanori Tamaoki,
  • Mitsuko Aono

摘要

To investigate the impact of low-dose radiation from fallout from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident on plants, inflorescences of Somei-yoshino cherry trees (Cerasus × yedoensis) were collected just before blooming from 2014 to 2021 at three locations: Tsushima Elementary School (TE), Tsushima Junior High School (TJ), and Namie High School (NH) in the Tsushima area of Namie town, Fukushima Prefecture. The immature pollen ratio (IPR) was examined. We modeled the annual changes in spatial dose rates (SDR) and the IPR to verify whether SDR affected the IPR. Our results showed that the low-dose radiation from FDNPP accident increased IPR in Somei-yoshino cherry trees at the study sites in Fukushima Prefecture. The relative increase of IPR was highest in the range from 30 to 60% in 2014, when the SDR was at its highest, and then decreased to 20–40% with the decline in the SDR in 2016, and remained in 15 to 35% range thereafter. The increase of IPR at the Fukushima sites over the extended period of time suggests negative impacts on pollen formation in other perennial species and accordingly long-term cumulative effects on biodiversity across the affected region.

Graphical Abstract