辐射防护 ›› 2025, Vol. 45 ›› Issue (4): 419-427.

• 放射生态学 • 上一篇    下一篇

137Cs-γ辐照对拟南芥子一代的影响研究

原寒1,2, 乔新燕1,2, 曹少飞1,2, 李建国1,2, 于志翔1,2   

  1. 1.中国辐射防护研究院,太原 030006;
    2.生态环境部辐射环境与健康重点实验室,太原 030006
  • 收稿日期:2025-03-19 发布日期:2025-07-28
  • 作者简介:原寒(1993—),女,2019年毕业于中国科学院生态学专业,硕士,助理研究员。E-mail:944718305@qq.com

Effects of 137Cs γ irradiation on Arabidopsis thaliana progeny

YUAN Han1,2, QIAO Xinyan1,2, CAO Shaofei1,2, LI Jianguo1,2, YU Zhixiang1,2   

  1. 1. China Institute for Radiation Protection, Taiyuan 030006;
    2. Key Laboratory of Radiation Environment & Health of the Ministry of Ecology and Environment, Taiyuan 030006
  • Received:2025-03-19 Published:2025-07-28

摘要: 为评价核设施对陆生生态系统的辐射影响,探讨γ辐射对植物种群的辐射效应,分析γ射线辐照引起子一代植物的诱变效应和诱变机制,选取哥伦比亚生态型拟南芥进行不同剂量率137Cs-γ辐照,并测定辐照后拟南芥子一代生长参数、生理生化指标和荧光参数。结果表明:不同剂量率γ辐照后,子一代拟南芥生长发育存在差异,株高整体呈现随剂量率的增加先升高后降低的趋势,50 mGy/h辐照后的拟南芥子一代叶片最小,丙二醛含量、过氧化物酶比活力、有效光化学量子产量最低,20 mGy/h的超氧化物歧化酶和过氧化氢酶比活力最低,谷胱甘肽还原酶、脯氨酸表现为辐照后的拟南芥子代植株均显著低于对照组,10 mGy/h、50 mGy/h辐照后叶绿素a和叶绿素b含量显著低于其他处理组,非光淬灭系数整体表现出随剂量率的增加呈先降低后升高的趋势,表明低剂量率辐照未对拟南芥子代光合作用反应中心PS Ⅱ造成不可逆伤害,植株主要通过调控抗氧化酶系统和渗透调节物质,对电离辐射做出应答。

关键词: 137Cs-γ辐照, 拟南芥, 子一代, 生理指标, 荧光参数

Abstract: In order to evaluate the radiation impact of nuclear facilities on terrestrial ecosystems, and to explore the effects and biological mechanisms of γ radiation on the offspring of Arabidopsis thaliana, the Col-0 Arabidopsis thaliana was selected and irradiated at different dose rates (0 mGy/h, 10 mGy/h, 20 mGy/h, 50 mGy/h, 100 mGy/h). The plant height, leaf length, leaf width, chlorophyll content, superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), glutathione reductase (GR), malondialdehyde (MDA), proline (PRO), and chlorophyll fluorescence indicators were measured. The results indicated that there were differences in the growth and development of Arabidopsis thaliana progeny after irradiation. The overall plant height showed a trend of increasing first and then decreasing. Plant leaves, MDA, POD, and effective photochemical quantum yield were the minimum points after 50 mGy/h irradiation. The SOD and CAT specific activity were the lowest at 20 mGy/h. GR and PRO showed that the irradiated Arabidopsis thaliana offspring plants were significantly lower than the control group. The content of chlorophyll a and chlorophyll b in 10 mGy/h and 50 mGy/h irradiation was significantly lower than other treatments. The non-photoquenching coefficient tendency indicates that low-dose rate irradiation did not cause irreversible damage to the photosynthetic response center PS Ⅱ in the offspring of Arabidopsis thaliana. Plants mainly respond to ionizing radiation by regulating the antioxidant enzyme system and osmolyte substances.

Key words: γ irradiation, Arabidopsis thaliana, first generation, physiological indicators, fluorescence parameters

中图分类号: 

  • X591