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Change in the Phytohormonal Status of Japanese Red Pine after the Fukushima Accident
Russian Journal of Ecology ( IF 1.1 ) Pub Date : 2021-04-06 , DOI: 10.1134/s1067413621020041
S. V. Bitarishvili , S. A. Geras’kin , V. I. Yoschenko , A. A. Prazyan , K. Nanba

Abstract

After the accident at the Fukushima Daiichi Nuclear Power Plant, an increased frequency of cancellation of the apical dominance has been revealed in young pine trees. The detected morphoses are most likely to result from radiation damage to the apical meristems of the conifers and also from changes in their phytohormonal status. To test this hypothesis, we have checked Japanese red pine populations from areas contaminated with radionuclides after the Fukushima accident for the frequency of morphoses related to cancellation of the apical dominance and estimated the content of main phytohormone classes: indoleacetic acid (IAA), indolylbutyric acid (IBA), zeatin, gibberellic acid (GA), and abscisic acid (ABA). The concentrations of phytohormones in the needles of young trees (5–8 years) were determined by high performance liquid chromatography. It has been shown for the first time that chronic radiation exposure changes the ratio of the main phytohormone classes in the needles of Japanese red pine: the concentrations of IAA, zeatin, and ABA increase, while the concentrations of GA decreases. The results have allowed us to explain the phenomenon of the increased frequency of cancellation of the apical dominance in the populations of young conifer trees from the zone of the Fukushima accident.



中文翻译:

福岛事故后日本赤松的植物激素状况变化

摘要

在福岛第一核电站发生事故后,幼小的松树中根尖支配地位的消除频率越来越高。所检测到的吗啡最有可能是由于对针叶树顶端分生组织的辐射损害以及其植物激素状态的变化而引起的。为了检验该假设,我们检查了福岛事故后受放射性核素污染的日本赤松种群中与根尖消灭相关的吗啡的频率,并估算了主要植物激素类别的含量:吲哚乙酸(IAA),吲哚基丁酸(IBA),玉米蛋白,赤霉素(GA)和脱落酸(ABA)。通过高效液相色谱法测定幼树(5–8年)的针叶中植物激素的浓度。首次显示,慢性辐射暴露会改变日本红松针中主要植物激素类别的比率:IAA,玉米蛋白和ABA的浓度增加,而GA的浓度减少。这些结果使我们能够解释福岛事故带中幼龄针叶树种群中根尖优势消除频率增加的现象。

更新日期:2021-04-08
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