Polivanova Oksana B, Tiurin Kirill N, Sivolapova Anastasia B, Goryunova Svetlana V, Zhevora Sergey V
Laboratory of Cell and Genomic Technologies, Russian Potato Research Center, 140051 Kraskovo, Russia.
Department of Biotechnology, Russian State Agrarian University, Moscow Timiryazev Agricultural Academy, Timiryazevskaya Str., 49, 127550 Moscow, Russia.
Antioxidants (Basel). 2023 Apr 18;12(4):956. doi: 10.3390/antiox12040956.
As a result of the accident at the Chornobyl Nuclear Power Plant, significant territories were exposed to ionizing radiation. Some isotopes, such as Cs, are capable of making a significant impact on living organisms in the long-term perspective. The generation of reactive oxygen species is one mechanism by which ionizing radiation affects living organisms, initiating mechanisms of antioxidant protection. In this article, the effect of increased ionizing radiation on the content of non-enzymatic antioxidants and the activity of antioxidant defense enzymes of L. was studied. This plant is widely distributed in Europe and characterized by high adaptability to abiotic factors. We found that the activity of antioxidant defense enzymes, such as catalase and peroxidase, weakly correlated with radiation exposure. The activity of ascorbate peroxidase, on the contrary, is strongly positively correlated with radiation exposure. The samples growing on the territory with constant low exposure to ionizing radiation were also characterized by an increased concentration of ascorbic acid and water-soluble phenolic compounds compared to the controls. This study may be useful for understanding the mechanisms underlying the adaptive reactions of plants under prolonged exposure to ionizing radiation.
由于切尔诺贝利核电站事故，大片区域遭受了电离辐射。一些同位素，如铯，从长远来看能够对生物产生重大影响。活性氧的产生是电离辐射影响生物的一种机制，引发了抗氧化保护机制。在本文中，研究了增加的电离辐射对L.的非酶抗氧化剂含量和抗氧化防御酶活性的影响。这种植物在欧洲广泛分布，具有对非生物因素的高度适应性。我们发现，过氧化氢酶和过氧化物酶等抗氧化防御酶的活性与辐射暴露的相关性较弱。相反，抗坏血酸过氧化物酶的活性与辐射暴露呈强烈正相关。与对照相比，在持续低剂量电离辐射区域生长的样本还具有抗坏血酸和水溶性酚类化合物浓度增加的特征。这项研究可能有助于理解植物在长期暴露于电离辐射下适应性反应的潜在机制。
