Study of micronucleus induction in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by <sup>252</sup>Cf fission neutrons

ZHANG Wenyi; JIAO Ling; HOSHI Masaharu

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Study of micronucleus induction in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by ²⁵²Cf fission neutrons

更新时间：2023-03-30

- Study of micronucleus induction in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by ²⁵²Cf fission neutrons
- Journal of Radiation Research and Radiation Processing Vol. 23, Issue 1, Pages: 15-18(2005)
- 作者机构：
  
  1.中国医学科学院中国协和医科大学放射医学研究所　天津　300192
  2.广岛大学原爆放射线医科学研究所　日本广岛　734-8553
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ZHANG Wenyi, JIAO Ling, HOSHI Masaharu. Study of micronucleus induction in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by ²⁵²Cf fission neutrons. [J]. Journal of Radiation Research and Radiation Processing 23(1):15-18(2005)
DOI：

ZHANG Wenyi, JIAO Ling, HOSHI Masaharu. Study of micronucleus induction in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by ²⁵²Cf fission neutrons. [J]. Journal of Radiation Research and Radiation Processing 23(1):15-18(2005) DOI：

摘要

用,252,Cf中子γ射线混合照射观察了不同剂量对洋葱根尖细胞微核诱发率的差异，研究,252,Cf裂变中子的相对生物效应（Relative biological effectivencess, RBE）。结果表明，单位剂量,252,Cf中子γ射线混合照射的微核诱发率为（1.84±0.10）%Gy,-1,，而归因于单位剂量,252,Cf裂变中子的微核诱发率为（2.74±0.15）%Gy,-1,；单位剂量,60,Co γ射线的微核诱发率为（0.022±0.002）%Gy,-1,。,252,Cf中子γ射线混合照射的RBE值为84±9，,252,Cf裂变中子的RBE值为124±13。单位剂量,252,Cf中子γ射线混合照射在,Allium cepa,洋葱种子根尖细胞内的微核诱发率约为,60,Co γ射线的84倍，中子照射所致DNA损伤的修复效率，可能不同于由γ射线照射所致DNA损伤的修复效率。

Abstract

The work is for a better understanding of relative biological effectiveness (RBE) of ,252,Cf fission neutrons. The frequency of micronuclei induced in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by unit dose of ,252,Cf neutron-γ mixed irradiation is different from that by ,60,Co γ-ray irradiation. The frequency of micronuclei induced by unit dose of ,252,Cf neutron-γ mixed irradiation and ,60,Co γ-ray irradiation are 1.84±0.10 and 0.022±0.002 (%Gy,-1,), respectively; and the frequency of micronuclei induced by unit dose of ,252,Cf fission neutrons is 2.74±0.15 (%Gy,-1,). The RBE values for ,252,Cf neutron-γ mixed irradiation and ,252,Cf fission neutrons are 84±9 and 124±13, respectively. The frequency of micronuclei induced in the root-tip cells of ,Allium cepa, onion seedlings irradiated as dry dormant seeds by unit dose of ,252,Cf neutron-γ mixed irradiation is about 84 times as that by ,60,Co γ-ray irradiation. The findings suggested that repair efficiency of DNA damage induced by neutrons might be different from that by γ-ray.

关键词

252Cf中子微核洋葱种子相对生物效应

Keywords

252CfNeutronMicronucleusOnion seedRelative biological effectiveness (RBE)

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Department of Radiation Medicine, Faculty of Navy Medicine, Second Military Medical University

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Study of micronucleus induction in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by 252Cf fission neutrons

DOI：

摘要

Abstract

关键词

Keywords

references

Study of micronucleus induction in the root-tip cells of onion seedlings after irradiation as dry dormant seeds by ²⁵²Cf fission neutrons