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LIU Qingfang; YU Lixia; DU Yan; ZHOU Libin QU Ying LU Dong JIN Wenjie LI Wenjian

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更新时间：2021-12-01

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- Journal of Radiation Research and Radiation Processing Vol. 31, Issue 1, Pages: 6-010205(2013)
- 作者机构：
  
  1. 1（中国科学院近代物理研究所）,兰州,730000
  2. 2（中国科学院大学）,北京,100049
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LIU Qingfang, YU Lixia, DU Yan, et al. [J]. Journal of Radiation Research and Radiation Processing 31(1):6-010205(2013)
DOI：

LIU Qingfang, YU Lixia, DU Yan, et al. [J]. Journal of Radiation Research and Radiation Processing 31(1):6-010205(2013) DOI：

摘要

采用12C6+离子束对小麦（Triticum aestivum L）种子进行不同剂量（0、10、20、30、60、120、150和200 Gy）辐照处理，考察种子萌发率、幼苗根长及株高、有丝分裂活动及存活率等生物学特性。结果表明：试验剂量范围内，大多数种子能够正常萌发；低剂量（10 Gy和20 Gy）辐照对幼苗生长具有促进作用，而高剂量辐照则表现出明显的抑制作用；根的生长与分生组织细胞有丝分裂指数密切相关，低剂量时有丝分裂指数略有增加，而高剂量则相反，分裂细胞被选择性阻滞在中期和后期。存活率曲线呈“抛物线”状，半致死剂量（LD50）为55 Gy。

Abstract

Wheat (Triticum aestivum L) seeds were irradiated with different doses of 12C6+ ion beams. Several biological endpoints including seeds germination rate, seedling root length and plant height, mitotic activities and survival rate were investigated. The results showed that in all dose range, most irradiated seeds were able to germinate normally. Low doses radiation (10–20 Gy) had a stimulation effect on seedling growth, while high doses radiation played an inhibition role. Especially root growth was strongly related to mitotic index. MI increased in low doses and decreased in high doses, and the mitotic cells were arrested in metaphase and anaphase. The survival curve showed that the “parabola” trend and the median lethal dose (LD50) was 55 Gy.Cited

关键词

12C 6+离子束小麦种子幼苗生长存活率半致死剂量

Keywords

12C6+ ion beamsWheat seedsSeedling growthSurvival rateLD50

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