1
|
Mishra S, Duarte GT, Horemans N, Ruytinx J, Gudkov D, Danchenko M. Complexity of responses to ionizing radiation in plants, and the impact on interacting biotic factors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171567. [PMID: 38460702 DOI: 10.1016/j.scitotenv.2024.171567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/20/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
In nature, plants are simultaneously exposed to different abiotic (e.g., heat, drought, and salinity) and biotic (e.g., bacteria, fungi, and insects) stresses. Climate change and anthropogenic pressure are expected to intensify the frequency of stress factors. Although plants are well equipped with unique and common defense systems protecting against stressors, they may compromise their growth and development for survival in such challenging environments. Ionizing radiation is a peculiar stress factor capable of causing clustered damage. Radionuclides are both naturally present on the planet and produced by human activities. Natural and artificial radioactivity affects plants on molecular, biochemical, cellular, physiological, populational, and transgenerational levels. Moreover, the fitness of pests, pathogens, and symbionts is concomitantly challenged in radiologically contaminated areas. Plant responses to artificial acute ionizing radiation exposure and laboratory-simulated or field chronic exposure are often discordant. Acute or chronic ionizing radiation exposure may occasionally prime the defense system of plants to better tolerate the biotic stress or could often exhaust their metabolic reserves, making plants more susceptible to pests and pathogens. Currently, these alternatives are only marginally explored. Our review summarizes the available literature on the responses of host plants, biotic factors, and their interaction to ionizing radiation exposure. Such systematic analysis contributes to improved risk assessment in radiologically contaminated areas.
Collapse
Affiliation(s)
- Shubhi Mishra
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, 950 07 Nitra, Slovakia
| | - Gustavo Turqueto Duarte
- Unit for Biosphere Impact Studies, Belgian Nuclear Research Centre SCK CEN, 2400 Mol, Belgium
| | - Nele Horemans
- Unit for Biosphere Impact Studies, Belgian Nuclear Research Centre SCK CEN, 2400 Mol, Belgium; Centre for Environmental Sciences, Hasselt University, 3590 Diepenbeek, Belgium
| | - Joske Ruytinx
- Department of Bio-engineering Sciences, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Dmitri Gudkov
- Institute of Hydrobiology, National Academy of Sciences of Ukraine, 04210 Kyiv, Ukraine
| | - Maksym Danchenko
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, 950 07 Nitra, Slovakia.
| |
Collapse
|
2
|
Geras'kin S. Plant adaptation to ionizing radiation: Mechanisms and patterns. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170201. [PMID: 38246389 DOI: 10.1016/j.scitotenv.2024.170201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/21/2023] [Accepted: 01/14/2024] [Indexed: 01/23/2024]
Abstract
Adaptation to environmental stressors is an essential property of plants that allows them, despite an immobile lifestyle, to survive in a changeable environment. The chain of successive events culminating in the final radiobiological reaction begins with the absorption of energy of ionizing radiation in the cell. Starting from stochastic acts of molecular injury formation, radiation damage gradually acquires deterministic features, which are expressed in a limited number of phenomena that complete plant radiation damage. As plants undergo specialization, the differences between plants and animals become more pronounced, leading to distinct responses to radiation. Chronic radiation exposure may activate biological mechanisms resulting in increased radioresistance of the population. The higher the level of radiation exposure and the sensitivity of plants to radiation, the more intensive the selection. Depending on the circumstances, enhanced radioresistance of a population can be achieved in different ways or has not evolved at all. High dose rates of chronic irradiation leаd to selection for the efficiency of repair systems, while low dose rates activate epigenetic mechanisms that lead to the maintenance of oxidative balance, additional synthesis of chaperones, and control of TEs transposition. Due to huge differences in the radiosensitivity of organisms that make up the ecosystem, irradiation can result in disruption of connections between components of ecosystems which may lead to consequences that can differ drastically from those expected at the organismal and population levels. Therefore, the use of ecological knowledge is essential for understanding the responses of populations and ecosystems to radiation exposure.
Collapse
Affiliation(s)
- Stanislav Geras'kin
- Russian Institute of Radiology and Agroecology of NRC "Kurchatov Institute", Kievskoe shosse, 109 km, Obninsk, Kaluga Region 249032, Russia.
| |
Collapse
|
3
|
Georgieva M, Vassileva V. Stress Management in Plants: Examining Provisional and Unique Dose-Dependent Responses. Int J Mol Sci 2023; 24:ijms24065105. [PMID: 36982199 PMCID: PMC10049000 DOI: 10.3390/ijms24065105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/05/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023] Open
Abstract
The purpose of this review is to critically evaluate the effects of different stress factors on higher plants, with particular attention given to the typical and unique dose-dependent responses that are essential for plant growth and development. Specifically, this review highlights the impact of stress on genome instability, including DNA damage and the molecular, physiological, and biochemical mechanisms that generate these effects. We provide an overview of the current understanding of predictable and unique dose-dependent trends in plant survival when exposed to low or high doses of stress. Understanding both the negative and positive impacts of stress responses, including genome instability, can provide insights into how plants react to different levels of stress, yielding more accurate predictions of their behavior in the natural environment. Applying the acquired knowledge can lead to improved crop productivity and potential development of more resilient plant varieties, ensuring a sustainable food source for the rapidly growing global population.
Collapse
|
4
|
Cadavid IC, Balbinott N, Margis R. Beyond transcription factors: more regulatory layers affecting soybean gene expression under abiotic stress. Genet Mol Biol 2023; 46:e20220166. [PMID: 36706026 PMCID: PMC9881580 DOI: 10.1590/1678-4685-gmb-2022-0166] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 11/18/2022] [Indexed: 01/28/2023] Open
Abstract
Abiotic stresses such as nutritional imbalance, salt, light intensity, and high and low temperatures negatively affect plant growth and development. Through the course of evolution, plants developed multiple mechanisms to cope with environmental variations, such as physiological, morphological, and molecular adaptations. Epigenetic regulation, transcription factor activity, and post-transcriptional regulation operated by RNA molecules are mechanisms associated with gene expression regulation under stress. Epigenetic regulation, including histone and DNA covalent modifications, triggers chromatin remodeling and changes the accessibility of transcription machinery leading to alterations in gene activity and plant homeostasis responses. Soybean is a legume widely produced and whose productivity is deeply affected by abiotic stresses. Many studies explored how soybean faces stress to identify key elements and improve productivity through breeding and genetic engineering. This review summarizes recent progress in soybean gene expression regulation through epigenetic modifications and circRNAs pathways, and points out the knowledge gaps that are important to study by the scientific community. It focuses on epigenetic factors participating in soybean abiotic stress responses, and chromatin modifications in response to stressful environments and draws attention to the regulatory potential of circular RNA in post-transcriptional processing.
Collapse
Affiliation(s)
- Isabel Cristina Cadavid
- Universidade Federal do Rio Grande do Sul, Centro de Biotecnologia, Programa de Pós-graduação em Biologia Celular e Molecular (PPGBCM), Porto Alegre, Brazil
| | - Natalia Balbinott
- Universidade Federal do Rio Grande do Sul, Departamento de Genética, Programa de Pós-graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, Brazil
| | - Rogerio Margis
- Universidade Federal do Rio Grande do Sul, Centro de Biotecnologia, Programa de Pós-graduação em Biologia Celular e Molecular (PPGBCM), Porto Alegre, Brazil.,Universidade Federal do Rio Grande do Sul, Departamento de Genética, Programa de Pós-graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, Brazil.,Universidade Federal do Rio Grande do Sul, Departamento de Biofisica, Porto Alegre, Brazil
| |
Collapse
|
5
|
Katsidi EC, Avramidou EV, Ganopoulos I, Barbas E, Doulis A, Triantafyllou A, Aravanopoulos FA. Genetics and epigenetics of Pinus nigra populations with differential exposure to air pollution. FRONTIERS IN PLANT SCIENCE 2023; 14:1139331. [PMID: 37089661 PMCID: PMC10117940 DOI: 10.3389/fpls.2023.1139331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/20/2023] [Indexed: 05/03/2023]
Abstract
Forest species in the course of their evolution have experienced several environmental challenges, which since historic times include anthropogenic pollution. The effects of pollution on the genetic and epigenetic diversity in black pine (Pinus nigra) forests were investigated in the Amyntaio - Ptolemais - Kozani Basin, which has been for decades the largest lignite mining and burning center of Greece, with a total installed generating capacity of about 4.5 GW, operating for more than 70 years and resulting in large amounts of primary air pollutant emissions, mainly SO2, NOx and PM10. P. nigra, a biomarker for air pollution and a keystone species of affected natural ecosystems, was examined in terms of phenology (cone and seed parameters), genetics (283 AFLP loci) and epigenetics (606 MSAP epiloci), using two populations (exposed to pollution and control) of the current (mature trees) and future (embryos) stand. It was found that cone, seed, as well as genetic diversity parameters, did not show statistically significant differences between the exposed population and the control. Nevertheless, statistically significant differences were detected at the population epigenetic level. Moreover, there was a further differentiation regarding the intergenerational comparison: while the epigenetic diversity does not substantially change in the two generations assessed in the control population, epigenetic diversity is significantly higher in the embryo population compared to the parental stand in the exposed population. This study sheds a light to genome dynamics in a forest tree population exposed to long term atmospheric pollution burden and stresses the importance of assessing both genetics and epigenetics in biomonitoring applications.
Collapse
Affiliation(s)
- Elissavet Ch. Katsidi
- Laboratory of Forest Genetics & Tree Breeding, Faculty of Agriculture, Forestry & Environmental Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evangelia V. Avramidou
- Laboratory of Forest Genetics & Tree Breeding, Faculty of Agriculture, Forestry & Environmental Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ioannis Ganopoulos
- Laboratory of Forest Genetics & Tree Breeding, Faculty of Agriculture, Forestry & Environmental Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evangelos Barbas
- Laboratory of Forest Genetics & Tree Breeding, Faculty of Agriculture, Forestry & Environmental Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Andreas Doulis
- Laboratory of Plant Biotechnology – Genomic Resources, Hellenic Agricultural Organization DEMETER, Institute of Viticulture, Floriculture and Vegetable Crops, Heraklion, Greece
| | - Athanasios Triantafyllou
- Laboratory of Atmospheric Pollution and Environmental Physics (LALEP), Faculty of Engineering, University of Western Macedonia, Kozani, Greece
| | - Filippos A. Aravanopoulos
- Laboratory of Forest Genetics & Tree Breeding, Faculty of Agriculture, Forestry & Environmental Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
- *Correspondence: Filippos A. Aravanopoulos,
| |
Collapse
|
6
|
Shimalina NS, Pozolotina VN, Orekhova NA. Stress memory in two generations of Plantago major from radioactive and chemical contaminated areas after the cessation of exposure. Int J Radiat Biol 2022:1-11. [PMID: 36353750 DOI: 10.1080/09553002.2023.2146232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
HYPOTHESIS The differences in viability, root length, and pro/antioxidant features of Plantago major seedlings identified in seed progeny formed in areas of radioactive and chemical contamination can persist in subsequent generations after the elimination of the stress. MATERIALS AND METHODS The seed mixtures of F1 generation were collected from P. major natural populations (P plants) growing for a long time in the East Ural Radioactive Trace, the Karabash Copper Smelter zone, and background area. The seeds of F2 generation were obtained from F1 generation plants grown on experimental plots with 'clean' agricultural background; F3 generation was grown from F2 generation on the same plots. The viability of seed progeny was estimated by survival rate and root length. Pro/antioxidant features were determined spectrophotometrically by malondialdehyde content, superoxide dismutase and catalase activities, and total content of low molecular weight antioxidants in seedlings. RESULTS AND CONCLUSIONS The hypothesis about the persistence of effects from chronic exposure to ionizing radiation and chemical contamination in the generations' sequence of P. major after the removal of stress was confirmed only partially. The data obtained indicated that changes in the prooxidant and antioxidant features of plants in response to low doses of ionizing radiation can persist for at least in two generations after the stress removal. In the case of long-term exposure to chemical contaminants, we observed the persistence of the effect in a succession of generations only on the morphological indicator of root length.
Collapse
Affiliation(s)
- Nadezhda S. Shimalina
- Laboratory of Population Radiobiology, Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 8 Marta str. 202, Yekaterinburg 620144, Russia
| | - Vera N. Pozolotina
- Laboratory of Population Radiobiology, Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 8 Marta str. 202, Yekaterinburg 620144, Russia
| | - Natalya A. Orekhova
- Laboratory of Population Radiobiology, Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 8 Marta str. 202, Yekaterinburg 620144, Russia
| |
Collapse
|
7
|
Kuzmina NS, Lapteva NS, Rubanovich AV. Hypermethylation of Gene Promoters in Blood Leukocytes of Irradiated Individuals—Final Research Results. RUSS J GENET+ 2022. [DOI: 10.1134/s1022795422110060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
8
|
Jopčík M, Libantová J, Lancíková V. Effect of chronic radiation on the flax (Linum usitatissimum L.) genome grown for six consecutive generations in the radioactive Chernobyl area. PHYSIOLOGIA PLANTARUM 2022; 174:e13745. [PMID: 35780328 DOI: 10.1111/ppl.13745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/01/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
The growth of plants under chronic radiation stress in the Chernobyl area may cause changes in the genome of plants. To assess the extent of genetic and epigenetic changes in nuclear DNA, seeds of the annual crop flax (Linum usitatissimum L.) of the Kyivskyi variety, sown 21 years after the accident and grown for six generations in radioactive (RAD) and remediated (REM) fields were analysed. Flaxseed used for sowing first generation, which served as a reference (REF), was also analysed. The AFLP (Amplified Fragment Length Polymorphism) revealed a higher number of specific EcoRI-MseI loci (3.4-fold) in pooled flaxseed samples harvested from the RAD field compared with the REM field, indicating a link between the mutation process in the flax genome and the ongoing adaptation process. MSAP (Methylation-Sensitive Amplified Polymorphism) detecting EcoRI-MspI and EcoRI-HpaII loci in flax nuclear DNA genome showed no significant differences in methylation level, reaching about 33% in each of the groups studied. On the other hand, significant changes in the DNA methylation pattern of flaxseed samples harvested from the RAD field compared with controls were detected. Pairwise FST comparison revealed within both, EcoRI-MspI and transformed methylation-Sensitive data sets more than a 3-fold increase of genetic divergence in the RAD field compared with both controls. These results indicate that the nuclear genome of flax exposed to chronic radiation for six generations has more mutations and uses DNA methylation as one of the adaptation mechanisms for sustainability under adverse conditions.
Collapse
Affiliation(s)
- Martin Jopčík
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Nitra, Slovakia
| | - Jana Libantová
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Nitra, Slovakia
| | - Veronika Lancíková
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Nitra, Slovakia
| |
Collapse
|
9
|
Li B, Zhao L, Zhang S, Cai H, Xu L, An B, Wang R, Liu G, He Y, Jiao C, Liu L, Xu Y. The Mutational, Epigenetic, and Transcriptional Effects Between Mixed High-Energy Particle Field (CR) and 7Li-Ion Beams (LR) Radiation in Wheat M 1 Seedlings. FRONTIERS IN PLANT SCIENCE 2022; 13:878420. [PMID: 35646033 PMCID: PMC9131052 DOI: 10.3389/fpls.2022.878420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/04/2022] [Indexed: 06/15/2023]
Abstract
Ionizing radiation (IR) is an effective approach for mutation breeding. Understanding the mutagenesis and transcriptional profiles induced by different mutagens is of great significance for improving mutation breeding efficiency. Here, using RNA sequencing and methylation-sensitive amplification polymorphism (MSAP) approaches, we compared the genetic variations, epigenetics, and transcriptional responses induced by the mixed high-energy particle field (CR) and 7Li-ion beam (LR) radiation in M1 seedlings of two wheat genotypes (Yangmai 18 and Yangmai 20). The results showed that, in both wheat genotypes, CR displayed significantly a higher mutation efficiency (1.79 × 10-6/bp) than that by LR (1.56 × 10-6/bp). The induced mutations were not evenly distributed across chromosomes and varied across wheat genotypes. In Y18 M1, the highest number of mutations were detected on Chr. 6B and Chr. 6D, whilst in Y20 M1, Chr. 7A and Chr. 3A had the highest mutations. The transcript results showed that total of 4,755 CR-regulated and 1,054 LR-regulated differentially expressed genes (DEGs) were identified in the both genotypes. Gene function enrichment analysis of DEGs showed that these DEGs overlapped or diverged in the cascades of molecular networks involved in "phenylpropanoid biosynthesis" and "starch and sucrose metabolism" pathways. Moreover, IR type specific responses were observed between CR an LR irradiation, including specific TFs and response pathways. MSAP analysis showed that DNA methylation level increased in LR treatment, while decreased at CR. The proportion of hypermethylation was higher than that of hypomethylation at LR, whereas a reverse pattern was observed at CR, indicating that DNA methylation plays critical roles in response to IR irradiation. All these results support that the response to different IRs in wheat includes both common and unique pathways, which can be served as a useful resource to better understand the mechanisms of responses to different IRs in other plants.
Collapse
Affiliation(s)
- Bo Li
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
- Hubei Collaborative Innovation Centre for the Industrialization of Major Grain Crops, Yangtze University, Jingzhou, China
| | - Linshu Zhao
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shuo Zhang
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Haiya Cai
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Le Xu
- Hubei Collaborative Innovation Centre for the Industrialization of Major Grain Crops, Yangtze University, Jingzhou, China
| | - Bingzhuang An
- Hubei Collaborative Innovation Centre for the Industrialization of Major Grain Crops, Yangtze University, Jingzhou, China
| | - Rong Wang
- Hubei Collaborative Innovation Centre for the Industrialization of Major Grain Crops, Yangtze University, Jingzhou, China
| | - Gang Liu
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Yonggang He
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Chunhai Jiao
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Luxiang Liu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yanhao Xu
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| |
Collapse
|
10
|
Kuzmina NS. Radiation-Induced DNA Methylation Disorders: In Vitro and In Vivo Studies. BIOL BULL+ 2022. [DOI: 10.1134/s1062359021110066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
Georgieva M, Bonchev G, Zehirov G, Vasileva V, Vassileva V. Neonicotinoid insecticides exert diverse cytotoxic and genotoxic effects on cultivated sunflower. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:53193-53207. [PMID: 34023994 DOI: 10.1007/s11356-021-14497-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 05/17/2021] [Indexed: 06/12/2023]
Abstract
Contamination with neonicotinoids is a global problem affecting environment and target and non-target organisms including plants. The present study explored the potential genotoxic and cytotoxic effects of the insecticides Actara 25 WD and Nuprid 200 SL containing the active substances thiamethoxam (TMX) and imidacloprid (IMI), respectively, on cultivated sunflower (Helianthus annuus L.). The half maximal effective concentration (½EC50) of the tested substances was calculated using a dose-response inhibition analysis of the growth of plant roots relative to the corresponding controls. Application of approximately ½EC50 or higher TMX doses significantly increased the antioxidant activity in sunflower leaves, whereas IMI led to a significant decrease in root antioxidant capacity, indicating organ-specific insecticide effects on sunflower plants. Even low doses (½EC50) of the studied neonicotinoids led to irregularities in mitotic phases and abnormalities in the cytokinesis and chromosome segregation, such as bridges, laggards, stickiness, and C-mitosis. Genotoxic effects manifested by a dose-independent induction of primary DNA damages and retrotransposon dynamics were also observed. The used set of physiological, biochemical, and genetic traits provides new information about the organ-specific effects of neonicotinoids in sunflower plants and elaborates on the complexity of mechanisms underpinning these effects that include DNA damages, cytokinesis defects, and genome instability.
Collapse
Affiliation(s)
- Mariyana Georgieva
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bldg. 21, 1113 Sofia, Bulgaria
| | - Georgi Bonchev
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bldg. 21, 1113 Sofia, Bulgaria
| | - Grigor Zehirov
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bldg. 21, 1113 Sofia, Bulgaria
| | - Vesela Vasileva
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bldg. 21, 1113 Sofia, Bulgaria
| | - Valya Vassileva
- Department of Molecular Biology and Genetics, Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bldg. 21, 1113, Sofia, Bulgaria.
| |
Collapse
|
12
|
Application of Gamma Ray-Responsive Genes for Transcriptome-Based Phytodosimetry in Rice. PLANTS 2021; 10:plants10050968. [PMID: 34067996 PMCID: PMC8152246 DOI: 10.3390/plants10050968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/25/2021] [Accepted: 05/12/2021] [Indexed: 11/26/2022]
Abstract
Transcriptome-based dose–response curves were recently applied to the phytodosimetry of gamma radiation in a dicot plant, Arabidopsis thaliana, as an alternative biological assessment of genotoxicity using DNA damage response (DDR) genes. In the present study, we characterized gamma ray-responsive marker genes for transcriptome-based phytodosimetry in a monocot plant, rice (Oryza sativa L.), and compared different phytodosimetry models between rice and Arabidopsis using gamma-H2AX, comet, and quantitative transcriptomic assays. The transcriptome-based dose–response curves of four marker genes (OsGRG, OsMutS, OsRAD51, and OsRPA1) were reliably fitted to quadratic or exponential decay equations (r2 > 0.99). However, the single or integrated dose–response curves of these genes were distinctive from the conventional models obtained by the gamma-H2AX or comet assays. In comparison, rice displayed a higher dose-dependency in the comet signal and OsRAD51 transcription, while the gamma-H2AX induction was more dose-dependent in Arabidopsis. The dose-dependent transcriptions of the selected gamma-ray-inducible marker genes, including OsGRG, OsMutS, OsRAD51, and OsRPA1 in rice and AtGRG, AtPARP1, AtRAD51, and AtRPA1E in Arabidopsis, were maintained similarly at different vegetative stages. These results suggested that the transcriptome-based phytodosimetry model should be further corrected with conventional genotoxicity- or DDR-based models despite the high reliability or dose-dependency of the model. In addition, the relative weighting of each gene in the integrated transcriptome-based dose–response model using multiple genes needs to be considered based on the trend and amplitude of the transcriptional change.
Collapse
|
13
|
Laanen P, Saenen E, Mysara M, Van de Walle J, Van Hees M, Nauts R, Van Nieuwerburgh F, Voorspoels S, Jacobs G, Cuypers A, Horemans N. Changes in DNA Methylation in Arabidopsis thaliana Plants Exposed Over Multiple Generations to Gamma Radiation. FRONTIERS IN PLANT SCIENCE 2021; 12:611783. [PMID: 33868326 PMCID: PMC8044457 DOI: 10.3389/fpls.2021.611783] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 03/09/2021] [Indexed: 05/05/2023]
Abstract
Previous studies have found indications that exposure to ionising radiation (IR) results in DNA methylation changes in plants. However, this phenomenon is yet to be studied across multiple generations. Furthermore, the exact role of these changes in the IR-induced plant response is still far from understood. Here, we study the effect of gamma radiation on DNA methylation and its effect across generations in young Arabidopsis plants. A multigenerational set-up was used in which three generations (Parent, generation 1, and generation 2) of 7-day old Arabidopsis thaliana plants were exposed to either of the different radiation treatments (30, 60, 110, or 430 mGy/h) or to natural background radiation (control condition) for 14 days. The parental generation consisted of previously non-exposed plants, whereas generation 1 and generation 2 plants had already received a similar irradiation in the previous one or two generations, respectively. Directly after exposure the entire methylomes were analysed with UPLC-MS/MS to measure whole genome methylation levels. Whole genome bisulfite sequencing was used to identify differentially methylated regions (DMRs), including their methylation context in the three generations and this for three different radiation conditions (control, 30 mGy/h, and 110 mGy/h). Both intra- and intergenerational comparisons of the genes and transposable elements associated with the DMRs were made. Taking the methylation context into account, the highest number of changes were found for cytosines followed directly by guanine (CG methylation), whereas only limited changes in CHG methylation occurred and no changes in CHH methylation were observed. A clear increase in IR-induced DMRs was seen over the three generations that were exposed to the lowest dose rate, where generation 2 had a markedly higher number of DMRs than the previous two generations (Parent and generation 1). Counterintuitively, we did not see significant differences in the plants exposed to the highest dose rate. A large number of DMRs associated with transposable elements were found, the majority of them being hypermethylated, likely leading to more genetic stability. Next to that, a significant number of DMRs were associated with genes (either in their promoter-associated region or gene body). A functional analysis of these genes showed an enrichment for genes related to development as well as various stress responses, including DNA repair, RNA splicing, and (a)biotic stress responses. These observations indicate a role of DNA methylation in the regulation of these genes in response to IR exposure and shows a possible role for epigenetics in plant adaptation to IR over multiple generations.
Collapse
Affiliation(s)
- Pol Laanen
- Biosphere Impact Studies, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Centre for Environmental Research, Hasselt University, Diepenbeek, Belgium
| | - Eline Saenen
- Biosphere Impact Studies, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Mohamed Mysara
- Biosphere Impact Studies, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Jorden Van de Walle
- Biosphere Impact Studies, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Centre for Environmental Research, Hasselt University, Diepenbeek, Belgium
| | - May Van Hees
- Biosphere Impact Studies, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Robin Nauts
- Biosphere Impact Studies, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Filip Van Nieuwerburgh
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ghent, Belgium
- NXTGNT, Ghent University, Ghent, Belgium
| | | | - Griet Jacobs
- Vlaamse Instelling voor Technologisch Onderzoek, VITO, Mol, Belgium
| | - Ann Cuypers
- Centre for Environmental Research, Hasselt University, Diepenbeek, Belgium
| | - Nele Horemans
- Biosphere Impact Studies, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Centre for Environmental Research, Hasselt University, Diepenbeek, Belgium
- *Correspondence: Nele Horemans,
| |
Collapse
|
14
|
Gombeau K, Bonzom JM, Cavalié I, Camilleri V, Orjollet D, Dubourg N, Beaugelin-Seiller K, Bourdineaud JP, Lengagne T, Armant O, Ravanat JL, Adam-Guillermin C. Dose-dependent genomic DNA hypermethylation and mitochondrial DNA damage in Japanese tree frogs sampled in the Fukushima Daiichi area. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 225:106429. [PMID: 33059178 DOI: 10.1016/j.jenvrad.2020.106429] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
The long-term consequences of the nuclear disaster at the Fukushima Daiichi Nuclear Power Plant (FDNPP) that occurred on March 2011, have been scarcely studied on wildlife. We sampled Japanese tree frogs (Dryophytes japonicus), in a 50 -km area around the FDNPP to test for an increase of DNA damages and variation of DNA methylation level. The ambient dose rate ranged between 0.4 and 2.8 μGy h-1 and the total estimated dose rate absorbed by frogs ranged between 0.3 and 7.7 μGy h-1. Frogs from contaminated sites exhibited a dose-dependent increase of global genomic DNA methylation level (5-mdC and 5-hmdC) and of mitochondrial DNA damages. Such DNA damages may indicate a genomic instability, which may induce physiological adaptations governed by DNA methylation changes. This study stresses the need for biological data combining targeted molecular methods and classic ecotoxicology, in order to better understand the impacts on wildlife of long term exposure to low ionizing radiation levels.
Collapse
Affiliation(s)
- Kewin Gombeau
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, 13115, France; University of Bordeaux, CNRS, UMR5095 CNRS, Institute for Cellular Biochemistry and Genetics, 1 Rue Camille Saint Saëns, CS 61390, 33077, Bordeaux Cedex, France
| | - Jean-Marc Bonzom
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, 13115, France
| | - Isabelle Cavalié
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, 13115, France
| | - Virginie Camilleri
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, 13115, France
| | - Daniel Orjollet
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LR2T, Cadarache, Saint-Paul-lez-Durance, 13115, France
| | - Nicolas Dubourg
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, 13115, France
| | - Karine Beaugelin-Seiller
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, 13115, France
| | - Jean-Paul Bourdineaud
- University of Bordeaux, CNRS, UMR MFP 5234, European Institute of Chemistry and Biology, 2 Rue Robert Escarpit, 33607, Pessac, France
| | - Thierry Lengagne
- Université de Lyon, UMR5023 Ecologie des Hydrosystèmes Naturels et Anthropisés, Université Lyon 1, ENTPE, CNRS, 6 Rue Raphaël Dubois, 69622, Villeurbanne, France
| | - Olivier Armant
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, 13115, France
| | - Jean-Luc Ravanat
- Univ. Grenoble Alpes, INAC-SCIB, 38000, Grenoble, France; CEA, INAC-SCIB Laboratoire des Lésions des Acides Nucléiques, 38000, Grenoble, France
| | | |
Collapse
|
15
|
Pernis M, Skultety L, Shevchenko V, Klubicova K, Rashydov N, Danchenko M. Soybean recovery from stress imposed by multigenerational growth in contaminated Chernobyl environment. JOURNAL OF PLANT PHYSIOLOGY 2020; 251:153219. [PMID: 32563765 DOI: 10.1016/j.jplph.2020.153219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 05/20/2020] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
Ionizing radiation is a genotoxic anthropogenic stressor. It can cause heritable changes in the plant genome, which can be either adaptive or detrimental. There is still considerable uncertainty about the effects of chronic low-intensity doses since earlier studies reported somewhat contradictory conclusions. Our project focused on the recovery from the multiyear chronic ionizing radiation stress. Soybean (Glycine max) was grown in field plots located at the Chernobyl exclusion zone and transferred to the clean ground in the subsequent generation. We profiled proteome of mature seeds by two-dimensional gel electrophoresis. Overall, 15 differentially abundant protein spots were identified in the field comparison and 11 in the recovery generation, primarily belonging to storage proteins, disease/defense, and metabolism categories. Data suggested that during multigenerational growth in a contaminated environment, detrimental heritable changes were accumulated. Chlorophyll fluorescence parameters were measured on the late vegetative state, pointing to partial recovery of photosynthesis from stress imposed by contaminating radionuclides. A plausible explanation for the observed phenomena is insufficient provisioning of seeds by lower quality resources, causing a persistent effect in the offspring generation. Additionally, we hypothesized that immunity against phytopathogens was compromised in the contaminated field, but perhaps even primed in the clean ground, yet this idea requires direct functional validation in future experiments. Despite showing clear signs of physiological recovery, one season was not enough to normalize biochemical processes. Overall, our data contribute to the more informed agricultural radioprotection.
Collapse
Affiliation(s)
- Miroslav Pernis
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Center, Akademicka 2, 95007 Nitra, Slovakia.
| | - Ludovit Skultety
- Institute of Virology, Biomedical Research Center, Dubravska 9, 84505 Bratislava, Slovakia; Institute of Microbiology, Czech Academy of Sciences, Videnska 1083, 14220 Prague, Czech Republic.
| | - Viktor Shevchenko
- Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine, Vasylkivska 31/17, 03022 Kyiv, Ukraine.
| | - Katarina Klubicova
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Center, Akademicka 2, 95007 Nitra, Slovakia.
| | - Namik Rashydov
- Institute of Cell Biology and Genetic Engineering, National Academy of Sciences of Ukraine, Akademika Zabolotnoho 148, 03143 Kyiv, Ukraine.
| | - Maksym Danchenko
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Center, Akademicka 2, 95007 Nitra, Slovakia; Institute of Virology, Biomedical Research Center, Dubravska 9, 84505 Bratislava, Slovakia.
| |
Collapse
|
16
|
Cannon G, Kiang JG. A review of the impact on the ecosystem after ionizing irradiation: wildlife population. Int J Radiat Biol 2020; 98:1054-1062. [PMID: 32663058 PMCID: PMC10139769 DOI: 10.1080/09553002.2020.1793021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE On 26 April 1986, reactor 4 at the Chernobyl power plant underwent a catastrophic failure leading to core explosions and open-air fires. On 11 March 2011, a combination of earthquake and tsunami led to a similar disaster at the Fukushima Daiichi power plant. In both cases, radioactive isotopes were released and contaminated the air, soil and water in a substantial area around the power plants. Humans were evacuated from the immediate regions but the wildlife stayed and continued to be affected by the ongoing high radiation exposure initially and later decayed amounts of fallout dusts with time. In this review, we will examine the significant effects of the increased radiation on vegetation, insects, fish, birds and mammals. CONCLUSIONS The initial intense radiation in these areas has gradually begun to decrease but still remains high. Adaptation to radiation is evident and the ecosystems have dynamically changed from the periods immediately after the accidents to the present day. Understanding the molecular mechanisms that allow the adaptation and recovery of wildlife to chronic radiation challenges would aid in future attempts at ecosystem remediation in the wake of such incidents.
Collapse
Affiliation(s)
- Georgetta Cannon
- Radiation Combined Injury Program, Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Juliann G Kiang
- Radiation Combined Injury Program, Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.,Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| |
Collapse
|
17
|
Tramontano A, Boffo FL, Russo G, De Rosa M, Iodice I, Pezone A. Methylation of the Suppressor Gene p16INK4a: Mechanism and Consequences. Biomolecules 2020; 10:biom10030446. [PMID: 32183138 PMCID: PMC7175352 DOI: 10.3390/biom10030446] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/09/2020] [Accepted: 03/10/2020] [Indexed: 12/15/2022] Open
Abstract
Tumor suppressor genes in the CDKN2A/B locus (p15INK4b, p16INK4a, and p14ARF) function as biological barriers to transformation and are the most frequently silenced or deleted genes in human cancers. This gene silencing frequently occurs due to DNA methylation of the promoter regions, although the underlying mechanism is currently unknown. We present evidence that methylation of p16INK4a promoter is associated with DNA damage caused by interference between transcription and replication processes. Inhibition of replication or transcription significantly reduces the DNA damage and CpGs methylation of the p16INK4a promoter. We conclude that de novo methylation of the promoter regions is dependent on local DNA damage. DNA methylation reduces the expression of p16INK4a and ultimately removes this barrier to oncogene-induced senescence.
Collapse
Affiliation(s)
- Alfonso Tramontano
- Department of Precision Medicine University of Campania “L. Vanvitelli”, 80131 Naples, Italy;
| | - Francesca Ludovica Boffo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Istituto di Endocrinologia ed Oncologia Sperimentale del C.N.R., Università Federico II, 80131 Napoli, Italy; (F.L.B.); (G.R.); (M.D.R.); (I.I.)
| | - Giusi Russo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Istituto di Endocrinologia ed Oncologia Sperimentale del C.N.R., Università Federico II, 80131 Napoli, Italy; (F.L.B.); (G.R.); (M.D.R.); (I.I.)
| | - Mariarosaria De Rosa
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Istituto di Endocrinologia ed Oncologia Sperimentale del C.N.R., Università Federico II, 80131 Napoli, Italy; (F.L.B.); (G.R.); (M.D.R.); (I.I.)
| | - Ilaria Iodice
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Istituto di Endocrinologia ed Oncologia Sperimentale del C.N.R., Università Federico II, 80131 Napoli, Italy; (F.L.B.); (G.R.); (M.D.R.); (I.I.)
| | - Antonio Pezone
- Department of Precision Medicine University of Campania “L. Vanvitelli”, 80131 Naples, Italy;
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Istituto di Endocrinologia ed Oncologia Sperimentale del C.N.R., Università Federico II, 80131 Napoli, Italy; (F.L.B.); (G.R.); (M.D.R.); (I.I.)
- Correspondence: or ; Tel.: +39-0817-463-614
| |
Collapse
|
18
|
Morozova V, Kashparova E, Levchuk S, Bishchuk Y, Kashparov V. The progeny of Chernobyl Arabidopsis thaliana plants does not exhibit changes in morphometric parameters and cellular antioxidant defence system of shoots. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 211:106076. [PMID: 31630854 DOI: 10.1016/j.jenvrad.2019.106076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/14/2018] [Accepted: 10/10/2019] [Indexed: 06/10/2023]
Abstract
Morphometric parameters and functional state of the cellular antioxidant defence system of shoots were studied in the progeny of Arabidopsis thaliana (L.) Heynh. (A. thaliana) plants, previously and chronically exposed in the Chernobyl Exclusion Zone (ChEZ). Changes in cellular antioxidant enzyme activities in the progeny of exposed plants were assumed because antioxidant status of cell may be altered by inherited epigenetic changes, resulting in changes in antioxidant-response genes expression. These changes can be inferred as induced expression of CAT and SOD genes was found previously for A. thaliana plants by another group of scientists. It is well-known that ionizing radiation may induce changes in hormonal-signalling net-work, shifting balance in growth factors that may cause changes in morphometric parameters of plants. Seeds from A. thaliana plants were collected in the ChEZ at different levels of the external dose rate from 0.28 ± 0.01 to 12.93 ± 0.08 μGy/h. Internal dose rate for parent plants was calculated on the basis of the activity concentration of 90Sr and 137Cs in the plants, using dose conversion coefficients for wild grass. Total dose rate, absorbed by parent plants, was calculated as the sum of the external and internal dose rate and was in a range between 2.8 ± 0.2 and 99 ± 8 μGy/h. Seeds were then grown in the standard laboratory conditions (nutrient-agar, light-dark cycle and appropriate temperature) to analyse morphometric parameters of seedlings and final germination percentage. No significant changes in the morphometric parameters (root length and rosette diameter of shoots) of the seedlings were observed. Changes in the final germination percentage of the studied seeds were found, but low correlation was observed between found changes and the dose rate, absorbed by parent plants. In contrast to the results obtained in A. thaliana plants directly sampled in the field, no effect on the functional state of the cellular antioxidant defence system of shoots in the progeny of Chernobyl A. thaliana plants was observed.
Collapse
Affiliation(s)
- Valeriia Morozova
- Ukrainian Institute of Agricultural Radiology of National University of Life and Environmental Sciences of Ukraine, Mashinobudivnykiv str.7, Chabany, Kyiv region, 08162, Ukraine.
| | - Elena Kashparova
- Ukrainian Institute of Agricultural Radiology of National University of Life and Environmental Sciences of Ukraine, Mashinobudivnykiv str.7, Chabany, Kyiv region, 08162, Ukraine
| | - Sviatoslav Levchuk
- Ukrainian Institute of Agricultural Radiology of National University of Life and Environmental Sciences of Ukraine, Mashinobudivnykiv str.7, Chabany, Kyiv region, 08162, Ukraine
| | - Yeugeniia Bishchuk
- Ukrainian Institute of Agricultural Radiology of National University of Life and Environmental Sciences of Ukraine, Mashinobudivnykiv str.7, Chabany, Kyiv region, 08162, Ukraine
| | - Valery Kashparov
- Ukrainian Institute of Agricultural Radiology of National University of Life and Environmental Sciences of Ukraine, Mashinobudivnykiv str.7, Chabany, Kyiv region, 08162, Ukraine.
| |
Collapse
|
19
|
Kuzmina NS, Lapteva NS, Rusinova GG, Azizova TV, Vyazovskaya NS, Rubanovich AV. Dose Dependence of Hypermethylation of Gene Promoters in Blood Leukocytes in Humans Occupationally Exposed to External γ-Radiation. BIOL BULL+ 2019. [DOI: 10.1134/s1062359019110062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
20
|
Kim JH. Chromatin Remodeling and Epigenetic Regulation in Plant DNA Damage Repair. Int J Mol Sci 2019; 20:ijms20174093. [PMID: 31443358 PMCID: PMC6747262 DOI: 10.3390/ijms20174093] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/19/2019] [Accepted: 08/20/2019] [Indexed: 12/19/2022] Open
Abstract
DNA damage response (DDR) in eukaryotic cells is initiated in the chromatin context. DNA damage and repair depend on or have influence on the chromatin dynamics associated with genome stability. Epigenetic modifiers, such as chromatin remodelers, histone modifiers, DNA (de-)methylation enzymes, and noncoding RNAs regulate DDR signaling and DNA repair by affecting chromatin dynamics. In recent years, significant progress has been made in the understanding of plant DDR and DNA repair. SUPPRESSOR OF GAMMA RESPONSE1, RETINOBLASTOMA RELATED1 (RBR1)/E2FA, and NAC103 have been proven to be key players in the mediation of DDR signaling in plants, while plant-specific chromatin remodelers, such as DECREASED DNA METHYLATION1, contribute to chromatin dynamics for DNA repair. There is accumulating evidence that plant epigenetic modifiers are involved in DDR and DNA repair. In this review, I examine how DDR and DNA repair machineries are concertedly regulated in Arabidopsis thaliana by a variety of epigenetic modifiers directing chromatin remodeling and epigenetic modification. This review will aid in updating our knowledge on DDR and DNA repair in plants.
Collapse
Affiliation(s)
- Jin-Hong Kim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 56212, Korea.
| |
Collapse
|
21
|
Horemans N, Spurgeon DJ, Lecomte-Pradines C, Saenen E, Bradshaw C, Oughton D, Rasnaca I, Kamstra JH, Adam-Guillermin C. Current evidence for a role of epigenetic mechanisms in response to ionizing radiation in an ecotoxicological context. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 251:469-483. [PMID: 31103007 DOI: 10.1016/j.envpol.2019.04.125] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/14/2019] [Accepted: 04/27/2019] [Indexed: 05/22/2023]
Abstract
The issue of potential long-term or hereditary effects for both humans and wildlife exposed to low doses (or dose rates) of ionising radiation is a major concern. Chronic exposure to ionising radiation, defined as an exposure over a large fraction of the organism's lifespan or even over several generations, can possibly have consequences in the progeny. Recent work has begun to show that epigenetics plays an important role in adaptation of organisms challenged to environmental stimulae. Changes to so-called epigenetic marks such as histone modifications, DNA methylation and non-coding RNAs result in altered transcriptomes and proteomes, without directly changing the DNA sequence. Moreover, some of these environmentally-induced epigenetic changes tend to persist over generations, and thus, epigenetic modifications are regarded as the conduits for environmental influence on the genome. Here, we review the current knowledge of possible involvement of epigenetics in the cascade of responses resulting from environmental exposure to ionising radiation. In addition, from a comparison of lab and field obtained data, we investigate evidence on radiation-induced changes in the epigenome and in particular the total or locus specific levels of DNA methylation. The challenges for future research and possible use of changes as an early warning (biomarker) of radiosensitivity and individual exposure is discussed. Such a biomarker could be used to detect and better understand the mechanisms of toxic action and inter/intra-species susceptibility to radiation within an environmental risk assessment and management context.
Collapse
Affiliation(s)
- Nele Horemans
- Belgian Nuclear Research Centre, Boeretang 200, B-2400, Mol, Belgium; Centre for Environmental Research, University of Hasselt, Agoralaan, 3590, Diepenbeek, Belgium.
| | - David J Spurgeon
- Centre for Ecology and Hydrology, MacLean Building, Benson Lane, Wallingford, Oxon, OX10 8BB, UK
| | - Catherine Lecomte-Pradines
- Institut de Radioprotection et de Sûreté Nucléaire, PSE-ENV/SRTE/LECO, Cadarache, Saint Paul Lez Durance, France
| | - Eline Saenen
- Belgian Nuclear Research Centre, Boeretang 200, B-2400, Mol, Belgium
| | - Clare Bradshaw
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91, Stockholm, Sweden
| | - Deborah Oughton
- Centre for Environmental Radioactivity (CERAD), Norwegian University of Life Sciences, 1430, Aas, Norway
| | - Ilze Rasnaca
- Centre for Ecology and Hydrology, MacLean Building, Benson Lane, Wallingford, Oxon, OX10 8BB, UK
| | - Jorke H Kamstra
- Faculty of Veterinary Medicine, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | - Christelle Adam-Guillermin
- Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE, Cadarache, Saint Paul Lez Durance, France
| |
Collapse
|
22
|
Manganese oxide nanoparticles induce genotoxicity and DNA hypomethylation in the moss Physcomitrella patens. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 842:146-157. [DOI: 10.1016/j.mrgentox.2018.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 02/06/2023]
|
23
|
Jovtchev G, Stankov A, Ravnachka I, Gateva S, Dimitrov D, Tyutyundzhiev N, Nikolova N, Angelov C. How can the natural radiation background affect DNA integrity in angiosperm plant species at different altitudes in Rila Mountain (Southwest Bulgaria)? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:13592-13601. [PMID: 30919184 DOI: 10.1007/s11356-019-04872-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 03/13/2019] [Indexed: 06/09/2023]
Abstract
Climate changes and anthropogenic factors are the main factors contributing to the destruction of natural ecosystems. The aim of this study was to investigate the extent to which wild plants adapt to UV, gamma background, and gross beta activity, as well as the possible damage that can be recorded in plants growing at different altitudes in Rila Mountain. We used physicochemical, cytogenetic, and molecular methods. Our investigations were done on the nine plant species characteristic of the ecosystems in Rila Mountain at three altitudes: 1500 m, 1782 m, and 2925 m. The registered beta activity in the plants did not depend on the altitude of the habitats. Our results showed that wild plant species differ in their tolerance to the combined effect of UV and IR radiation as well as climate factors. The genotype plays a more important role than the difference in the habitat altitude. The comet assay adapted by us for these plant species showed that the DNA of Epilobium angustifolium L. (Onagraceae) growing at 1500 m was more susceptible to damage than that of Dactylis glomerata L. (Poaceae). Both these species growing at 1782 m did not show any increase in DNA damage evaluated as the level of DNA migration. The level of DNA damage in Pedicularis orthantha Griseb. (Orobanchaceae) at 2925 m was comparable to that at a lower altitude. Regarding the formation of micronuclei, grass species were more sensitive to UV- and IR-induced DNA damage than cereals. Our data imply the existence of specific protective mechanisms developed by plants to overcome DNA damage induced by stress factors.
Collapse
Affiliation(s)
- Gabriele Jovtchev
- Department of Ecosystem Research, Environmental Risk Assessment and Conservation Biology, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113, Sofia, Bulgaria.
| | - Alexander Stankov
- Department of Ecosystem Research, Environmental Risk Assessment and Conservation Biology, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113, Sofia, Bulgaria
| | - Ivanka Ravnachka
- BEO-Moussala, Institute for Nuclear Researches and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784, Sofia, Bulgaria
| | - Svetla Gateva
- Department of Ecosystem Research, Environmental Risk Assessment and Conservation Biology, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113, Sofia, Bulgaria
| | - Dimitar Dimitrov
- National Museum of Natural History, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd, 1000, Sofia, Bulgaria
| | - Nikolai Tyutyundzhiev
- Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigtadsko Chaussee Blvd, 1784, Sofia, Bulgaria
| | - Nina Nikolova
- BEO-Moussala, Institute for Nuclear Researches and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784, Sofia, Bulgaria
| | - Christo Angelov
- BEO-Moussala, Institute for Nuclear Researches and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784, Sofia, Bulgaria
| |
Collapse
|
24
|
Kryvokhyzha MV, Krutovsky KV, Rashydov NM. Differential expression of flowering genes in Arabidopsis thaliana under chronic and acute ionizing radiation. Int J Radiat Biol 2018; 95:626-634. [PMID: 30570374 DOI: 10.1080/09553002.2019.1562251] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PURPOSE Chronic and acute irradiations have drastic effects on flowering stage that plays an important role in further seed development and can determine seed yield. The expression of the key flowering genes, AP1, CO, GI, FT, FLC, and LFY, sensitive to irradiation repair gene RAD51 and the proliferation gene PCNA2 were studied in the wild-type Arabidopsis thaliana (Columbia ecotype) under chronic and acute irradiations. MATERIALS AND METHODS Chronic irradiation was performed using the radioactive isotope 137СsCl in two total doses of 3 cGy and 17 cGy, with the dose rate of 10-7 cGy/s and 6.8 10-6 cGy/s, respectively. The plants were grown under chronic irradiation during 6 weeks, from seeds till the 6.3 stage of flowering. For acute exposure, the plants were X-ray irradiated one time at the 5.0 development stage (20 days old) by a total dose of 15 Gy with the dose rate of 89 cGy/s. RESULTS After chronic irradiation with the 3 cGy dose the irradiated plants demonstrated 8 ± 2.8 days earlier flowering than in the control group. However, at the 17 cGy chronic and at the 15 Gy acute doses plants showed 14 ± 3.7 and 2 ± 1.4 days later flowering, respectively. The 3 cGy chronic exposure significantly increased the expression of the CO gene by a factor of 1.152 (1.087-1.217 95% C.I.) and decreased the expression of the FT gene by a factor of 0.128 (0.021-0.396 95% C.I.). The 17 cGy chronic exposure decreased expression of the AP1 gene by a factor of 0.872 (0.803-0.940 95% C.I.) and the LFY gene by a factor of 0.471 (0.306-0.687 95% C.I.). The 15 Gy acute exposure decreased the expression of the AP1 gene by a factor of 0.104 (0.074-0.144 95% C.I.) and the PCNA2 gene by a factor of 0.346 (0.238-0.488 95% C.I.). CONCLUSIONS The increased expression of the CO gene and decreased expression of the AP1 and FT genes under the lower dose of chronic exposure were associated with earlier flowering. The acute exposure increased the expression of the PCNA2 gene and decreased the expression of the flowering genes, except AP1. The flowering was delayed under both the higher dose of chronic exposure and under acute exposure, but it was less affected by the latter. Presumably, it was related to the activation of DNA repair under the 3 cGy chronic and 15 Gy acute irradiations.
Collapse
Affiliation(s)
- Maryna V Kryvokhyzha
- a Institute of Cell Biology and Genetic Engineering , National Academy of Sciences of Ukraine , Kiev , Ukraine
| | - Konstantin V Krutovsky
- b Department of Forest Genetics and Forest Tree Breeding , Georg-August University of Göttingen , Göttingen , Germany.,c Vavilov Institute of General Genetics , Russian Academy of Sciences , Moscow , Russia.,d Genome Research and Education Center , Siberian Federal University , Krasnoyarsk , Russia.,e Department of Ecosystem Science and Management , Texas A&M University , College Station , TX , USA
| | - Namik M Rashydov
- a Institute of Cell Biology and Genetic Engineering , National Academy of Sciences of Ukraine , Kiev , Ukraine
| |
Collapse
|
25
|
Liu Y, Zhang J, Feng S, Zhao T, Li Z, Wang L, Wang P, Du H, Yuan S, Sun L. A Novel Camptothecin Derivative 3j Inhibits Nsclc Proliferation Via Induction of Cell Cycle Arrest By Topo I-Mediated DNA Damage. Anticancer Agents Med Chem 2018; 19:365-374. [PMID: 30523769 DOI: 10.2174/1871520619666181207102037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 11/14/2018] [Accepted: 11/20/2018] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The aim of this study is to investigate the inhibitory effect of camptothecin derivative 3j on Non-Small Cell Lung Cancer (NSCLCs) cells and the potential anti-tumor mechanisms. BACKGROUND Camptothecin compounds are considered as the third largest natural drugs which are widely investigated in the world and they suffered restriction because of serious toxicity, such as hemorrhagic cystitis and bone marrow suppression. METHODS Using cell proliferation assay and S180 tumor mice model, a series of 20(S)-O-substituted benzoyl 7- ethylcamptothecin compounds were screened and evaluated the antitumor activities in vitro and in vivo. Camptothecin derivative 3j was selected for further study using flow cytometry in NSCLCs cells. Cell cycle related protein cyclin A2, CDK2, cyclin D and cyclin E were detected by Western Blot. Then, computer molecular docking was used to confirm the interaction between 3j and Topo I. Also, DNA relaxation assay and alkaline comet assay were used to investigate the mechanism of 3j on DNA damage. RESULTS Our results demonstrated that camptothecin derivative 3j showed a greater antitumor effect in eleven 20(S)-O-substituted benzoyl 7-ethylcamptothecin compounds in vitro and in vivo. The IC50 of 3j was 1.54± 0.41 µM lower than irinotecan with an IC50 of 13.86±0.80 µM in NCI-H460 cell, which was reduced by 8 fold. In NCI-H1975 cell, the IC50 of 3j was 1.87±0.23 µM lower than irinotecan (IC50±SD, 5.35±0.38 µM), dropped by 1.8 fold. Flow cytometry analysis revealed that 3j induced significant accumulation in a dose-dependent manner. After 24h of 3j (10 µM) treatment, the percentage of NCI-H460 cell in S-phase significantly increased (to 93.54 ± 4.4%) compared with control cells (31.67 ± 3.4%). Similarly, the percentage of NCI-H1975 cell in Sphase significantly increased (to 83.99 ± 2.4%) compared with control cells (34.45 ± 3.9%) after treatment with 10µM of 3j. Moreover, increased levels of cyclin A2, CDK2, and decreased levels of cyclin D, cyclin E further confirmed that cell cycle arrest was induced by 3j. Furthermore, molecular docking studies suggested that 3j interacted with Topo I-DNA and DNA-relaxation assay simultaneously confirmed that 3j suppressed the activity of Topo I. Research on the mechanism showed that 3j exhibited anti-tumour activity via activating the DNA damage response pathway and suppressing the repair pathway in NSCLC cells. CONCLUSION Novel camptothecin derivative 3j has been demonstrated as a promising antitumor agent and remains to be assessed in further studies.
Collapse
Affiliation(s)
- Yang Liu
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Jingyin Zhang
- Department of Gynaecology and Obstetrics, Southeast University Affiliated Zhongda Hospital, Nanjing, Jiangsu, China
| | - Shuyun Feng
- Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Tingli Zhao
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Zhengzheng Li
- Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Lai Wang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Puhai Wang
- Jiangsu Provincial Institue of Materia Medica, Nanjing Technology University, Nanjing, Jiangsu, China
| | - Hongzhi Du
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Shengtao Yuan
- Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Li Sun
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, Jiangsu, China
| |
Collapse
|
26
|
Horemans N, Nauts R, Vives I Batlle J, Van Hees M, Jacobs G, Voorspoels S, Gaschak S, Nanba K, Saenen E. Genome-wide DNA methylation changes in two Brassicaceae species sampled alongside a radiation gradient in Chernobyl and Fukushima. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 192:405-416. [PMID: 30055441 DOI: 10.1016/j.jenvrad.2018.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 07/04/2018] [Accepted: 07/12/2018] [Indexed: 05/22/2023]
Abstract
The long-term radiological impact to the environment of the nuclear accidents in Chernobyl and Fukushima is still under discussion. In the course of spring of 2016 we sampled two Brassicacea plants, Arabidopsis thaliana and Capsella bursa-pastoris native to Ukraine and Japan, respectively, alongside a gradient of radiation within the exclusion and difficult to return zones of Chernobyl (CEZ) and Fukushima (FEZ). Ambient dose rates were similar for both sampling gradients ranging from 0.5 to 80 μGy/h at plant height. The hypothesis was tested whether a history of several generations of plants growing in enhanced radiation exposure conditions would have led to changes in genome-wide DNA methylation. However, no differences were found in the global percentage of 5-methylated cytosines in Capsella bursa pastoris plants sampled in FEZ. On the other hand a significant decrease in whole genome methylation percentage in Arabidopsis thaliana plants was found in CEZ mainly governed by the highest exposed plants. These data support a link between exposure to changed environmental conditions and changes genome methylation. In addition to methylation the activity concentration of different radionuclides, 137Cs, 90Sr, 241Am and Pu-238,239,240 for CEZ and 137, 134Cs for FEZ, was analysed in both soil and plant samples. The ratio of 5.6 between 137Cs compared to 134Cs was as expected five years after the FEZ accident. For CEZ 137Cs is the most abundant polluting radionuclide in soil followed by 90Sr. Whereas 241Am and Pu-isotopes are only marginally present. In the plant tissue, however, higher levels of Sr than Cs were retrieved due to a high uptake of 90Sr in the plants. The 90Sr transfer factors ranged in CEZ from 5 to 20 (kg/kg) depending on the locality. Based on the activity concentrations of the different radionuclides the ERICA tool was used to estimate the total dose rates to the plants. It was found that for FEZ the doses was mainly contributable to the external Cs-isotopes and as such estimated total dose rates (0.13-38 μGy/h) were in the same range as the ambient measured dose rates. In strong contrast this was not true for CEZ where the total dose rate was mainly due to high uptake of the 90Sr leading to dose rates ranging from 1 to 370 μGy/h. Hence our data clearly indicate that not taking into account the internal contamination in CEZ will lead to considerable underestimation of the doses to the plants. Additionally they show that it is hard to compare the two nuclear accidental sites and one of the main reasons is the difference in contamination profile.
Collapse
Affiliation(s)
- Nele Horemans
- Belgian Nuclear Research Centre (SCK•CEN), Biosphere Impact Studies, Boeretang 200, B-2400, Mol, Belgium; Centre for Environmental Research, University of Hasselt, Universiteitslaan 1, 3590, Diepenbeek, Belgium.
| | - Robin Nauts
- Belgian Nuclear Research Centre (SCK•CEN), Biosphere Impact Studies, Boeretang 200, B-2400, Mol, Belgium
| | - Jordi Vives I Batlle
- Belgian Nuclear Research Centre (SCK•CEN), Biosphere Impact Studies, Boeretang 200, B-2400, Mol, Belgium
| | - May Van Hees
- Belgian Nuclear Research Centre (SCK•CEN), Biosphere Impact Studies, Boeretang 200, B-2400, Mol, Belgium
| | - Griet Jacobs
- Flemish Institute for Technological Research (VITO Nv), Boeretang 200, B-2400, Mol, Belgium
| | - Stefan Voorspoels
- Flemish Institute for Technological Research (VITO Nv), Boeretang 200, B-2400, Mol, Belgium
| | - Sergey Gaschak
- Chernobyl Center for Nuclear Safety, Radioactive Waste and Radioecology, International Radioecology Laboratory, 07100, Slavutych, Ukraine
| | - Kenji Nanba
- Institute of Environmental Radioactivity of Fukushima University, 1 Kanayagawa, Fukushima, 960-1296, Japan
| | - Eline Saenen
- Belgian Nuclear Research Centre (SCK•CEN), Biosphere Impact Studies, Boeretang 200, B-2400, Mol, Belgium
| |
Collapse
|
27
|
Caplin N, Willey N. Ionizing Radiation, Higher Plants, and Radioprotection: From Acute High Doses to Chronic Low Doses. FRONTIERS IN PLANT SCIENCE 2018; 9:847. [PMID: 29997637 PMCID: PMC6028737 DOI: 10.3389/fpls.2018.00847] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/31/2018] [Indexed: 05/09/2023]
Abstract
Understanding the effects of ionizing radiation (IR) on plants is important for environmental protection, for agriculture and horticulture, and for space science but plants have significant biological differences to the animals from which much relevant knowledge is derived. The effects of IR on plants are understood best at acute high doses because there have been; (a) controlled experiments in the field using point sources, (b) field studies in the immediate aftermath of nuclear accidents, and (c) controlled laboratory experiments. A compilation of studies of the effects of IR on plants reveals that although there are numerous field studies of the effects of chronic low doses on plants, there are few controlled experiments that used chronic low doses. Using the Bradford-Hill criteria widely used in epidemiological studies we suggest that a new phase of chronic low-level radiation research on plants is desirable if its effects are to be properly elucidated. We emphasize the plant biological contexts that should direct such research. We review previously reported effects from the molecular to community level and, using a plant stress biology context, discuss a variety of acute high- and chronic low-dose data against Derived Consideration Reference Levels (DCRLs) used for environmental protection. We suggest that chronic low-level IR can sometimes have effects at the molecular and cytogenetic level at DCRL dose rates (and perhaps below) but that there are unlikely to be environmentally significant effects at higher levels of biological organization. We conclude that, although current data meets only some of the Bradford-Hill criteria, current DCRLs for plants are very likely to be appropriate at biological scales relevant to environmental protection (and for which they were intended) but that research designed with an appropriate biological context and with more of the Bradford-Hill criteria in mind would strengthen this assertion. We note that the effects of IR have been investigated on only a small proportion of plant species and that research with a wider range of species might improve not only the understanding of the biological effects of radiation but also that of the response of plants to environmental stress.
Collapse
Affiliation(s)
| | - Neil Willey
- Centre for Research in Biosciences, University of the West of England, Bristol, Bristol, United Kingdom
| |
Collapse
|
28
|
Ryu TH, Kim JK, Kim JI, Kim JH. Transcriptome-based biological dosimetry of gamma radiation in Arabidopsis using DNA damage response genes. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 181:94-101. [PMID: 29128690 DOI: 10.1016/j.jenvrad.2017.11.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 10/20/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
Plants are used as representative reference biota for the biological assessment of environmental risks such as ionizing radiation due to their immobility. This study proposed a faster, more economical, and more effective method than conventional cytogenetic methods for the biological dosimetry of ionizing radiation in plants (phytodosimetry). We compared various dose-response curves for the radiation-induced DNA damage response (DDR) in Arabidopsis thaliana after relatively "low-dose" gamma irradiation (3, 6, 12, 24, and 48 Gy) below tens of Gy using comet (or single-cell gel electrophoresis), gamma-H2AX, and transcriptomic assays of seven DDR genes (AGO2, BRCA1, GRG, PARP1, RAD17, RAD51, and RPA1E) using quantitative real time PCR. The DDR signal from the comet assay was saturated at 6 Gy, while the gamma-H2AX signal increased up to 48 Gy, following a linear-quadratic dose-response model. The transcriptional changes in the seven DDR genes were fitted to linear or supra-linear quadratic equations with significant dose-dependency. The dose-dependent transcriptional changes were maintained similarly until 24 h after irradiation. The integrated transcriptional dose-response model of AGO2, BRCA1, GRG, and PARP1 was very similar to that of gamma-H2AX, while the transcriptional changes in the BRCA1, GRG, and PARP1 DDR genes revealed significant dependency on the dose-rate, ecotype, and radiation dose. These results suggest that the transcriptome-based dose-response model fitted to a quadratic equation could be used practically for phytodosimetry instead of conventional cytogenetic models, such as the comet and gamma-H2AX assays. The effects of dose-rate and ecotype on the transcriptional changes of DDR genes should also be considered to improve the transcriptome-based phytodosimetry model.
Collapse
Affiliation(s)
- Tae Ho Ryu
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 56212, Republic of Korea; Department of Biotechnology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Jin Kyu Kim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 56212, Republic of Korea; Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Jeong-Il Kim
- Department of Biotechnology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Jin-Hong Kim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 56212, Republic of Korea; Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.
| |
Collapse
|
29
|
Volkova PY, Geras'kin SA, Horemans N, Makarenko ES, Saenen E, Duarte GT, Nauts R, Bondarenko VS, Jacobs G, Voorspoels S, Kudin M. Chronic radiation exposure as an ecological factor: Hypermethylation and genetic differentiation in irradiated Scots pine populations. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 232:105-112. [PMID: 28931465 DOI: 10.1016/j.envpol.2017.08.123] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 08/14/2017] [Accepted: 08/24/2017] [Indexed: 05/18/2023]
Abstract
Genetic and epigenetic changes were investigated in chronically irradiated Scots pine (Pinus sylvestris L.) populations from territories that were heavily contaminated by radionuclides as result of the Chernobyl Nuclear Power Plant accident. In comparison to the reference site, the genetic diversity revealed by electrophoretic mobility of AFLPs was found to be significantly higher at the radioactively contaminated areas. In addition, the genome of pine trees was significantly hypermethylated at 4 of the 7 affected sites.
Collapse
Affiliation(s)
- P Yu Volkova
- Institute of Radiology and Agroecology, 249030, Obninsk, Russian Federation.
| | - S A Geras'kin
- Institute of Radiology and Agroecology, 249030, Obninsk, Russian Federation
| | - N Horemans
- Belgian Nuclear Research Centre SCK•CEN, Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium
| | - E S Makarenko
- Institute of Radiology and Agroecology, 249030, Obninsk, Russian Federation
| | - E Saenen
- Belgian Nuclear Research Centre SCK•CEN, Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium
| | - G T Duarte
- Institute of Radiology and Agroecology, 249030, Obninsk, Russian Federation
| | - R Nauts
- Belgian Nuclear Research Centre SCK•CEN, Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium
| | - V S Bondarenko
- Institute of Radiology and Agroecology, 249030, Obninsk, Russian Federation
| | - G Jacobs
- Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400 Mol, Belgium
| | - S Voorspoels
- Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400 Mol, Belgium
| | - M Kudin
- Polessye State Radiation Ecological Reserve, 247618, Belarus
| |
Collapse
|