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Car C, Gilles A, Armant O, Burraco P, Beaugelin‐Seiller K, Gashchak S, Camilleri V, Cavalié I, Laloi P, Adam‐Guillermin C, Orizaola G, Bonzom J. Unusual evolution of tree frog populations in the Chernobyl exclusion zone. Evol Appl 2022; 15:203-219. [PMID: 35233243 PMCID: PMC8867709 DOI: 10.1111/eva.13282] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/25/2021] [Accepted: 06/29/2021] [Indexed: 12/03/2022] Open
Abstract
Despite the ubiquity of pollutants in the environment, their long-term ecological consequences are not always clear and still poorly studied. This is the case concerning the radioactive contamination of the environment following the major nuclear accident at the Chernobyl nuclear power plant. Notwithstanding the implications of evolutionary processes on the population status, few studies concern the evolution of organisms chronically exposed to ionizing radiation in the Chernobyl exclusion zone. Here, we examined genetic markers for 19 populations of Eastern tree frog (Hyla orientalis) sampled in the Chernobyl region about thirty years after the nuclear power plant accident to investigate microevolutionary processes ongoing in local populations. Genetic diversity estimated from nuclear and mitochondrial markers showed an absence of genetic erosion and higher mitochondrial diversity in tree frogs from the Chernobyl exclusion zone compared to other European populations. Moreover, the study of haplotype network permitted us to decipher the presence of an independent recent evolutionary history of Chernobyl exclusion zone's Eastern tree frogs caused by an elevated mutation rate compared to other European populations. By fitting to our data a model of haplotype network evolution, we suspected that Eastern tree frog populations in the Chernobyl exclusion zone have a high mitochondrial mutation rate and small effective population sizes. These data suggest that Eastern tree frog populations might offset the impact of deleterious mutations because of their large clutch size, but also question the long-term impact of ionizing radiation on the status of other species living in the Chernobyl exclusion zone.
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Affiliation(s)
- Clément Car
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN)PSE‐ENV/SRTE/LECOCadaracheFrance
| | - André Gilles
- UMR RECOVERINRAEAix‐Marseille Université, Centre Saint‐CharlesMarseilleFrance
| | - Olivier Armant
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN)PSE‐ENV/SRTE/LECOCadaracheFrance
| | - Pablo Burraco
- Animal EcologyDepartment of Ecology and GeneticsEvolutionary Biology CentreUppsala UniversityUppsalaSweden
- Institute of Biodiversity, Animal Health and Comparative MedicineCollege of Medical, Veterinary and Life SciencesUniversity of GlasgowGlasgowUK
| | | | - Sergey Gashchak
- Chornobyl Center for Nuclear SafetyRadioactive Waste and RadioecologySlavutychUkraine
| | - Virginie Camilleri
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN)PSE‐ENV/SRTE/LECOCadaracheFrance
| | - Isabelle Cavalié
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN)PSE‐ENV/SRTE/LECOCadaracheFrance
| | - Patrick Laloi
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN)PSE‐ENV/SRTE/LECOCadaracheFrance
| | | | - Germán Orizaola
- IMIB‐Biodiversity Research Institute (Univ. Oviedo‐CSIC‐Princip. Asturias)Universidad de OviedoMieres‐AsturiasSpain
- Department Biology Organisms and SystemsZoology UnitUniversity of OviedoOviedo‐AsturiasSpain
| | - Jean‐Marc Bonzom
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN)PSE‐ENV/SRTE/LECOCadaracheFrance
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2
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Yang S, Chen Z, Cheng Y, Liu T, Pu Y, Liang G. Environmental toxicology wars: Organ-on-a-chip for assessing the toxicity of environmental pollutants. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115861. [PMID: 33120150 DOI: 10.1016/j.envpol.2020.115861] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 10/13/2020] [Accepted: 10/14/2020] [Indexed: 05/07/2023]
Abstract
Environmental pollution is a widespread problem, which has seriously threatened human health and led to an increase of human diseases. Therefore, it is critical to evaluate environmental pollutants quickly and efficiently. Because of obvious inter-species differences between animals and humans, and lack of physiologically-relevant microenvironment, animal models and in vitro two-dimensional (2D) models can not accurately describe toxicological effects and predicting actual in vivo responses. To make up the limitations of conventional environmental toxicology screening, organ-on-a-chip (OOC) systems are increasingly developing. OOC systems can provide a well-organized architecture with comparable to the complex microenvironment in vivo and generate realistic responses to environmental pollutants. The feasibility, adjustability and reliability of OCC systems make it possible to offer new opportunities for environmental pollutants screening, which can study their metabolism, collective response, and fate in vivo. Further progress can address the challenges to make OCC systems better investigate and evaluate environmental pollutants with high predictive power.
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Affiliation(s)
- Sheng Yang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, PR China, 210009.
| | - Zaozao Chen
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, PR China, 210096.
| | - Yanping Cheng
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, PR China, 210009.
| | - Tong Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, PR China, 210009.
| | - Yuepu Pu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, PR China, 210009.
| | - Geyu Liang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, PR China, 210009.
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3
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Yang W, Ding J, Wang S, Yang Y, Song G, Zhang Y. Variation in genetic diversity of tree sparrow (Passer montanus) population in long-term environmental heavy metal polluted areas. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114396. [PMID: 32222667 DOI: 10.1016/j.envpol.2020.114396] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 03/16/2020] [Accepted: 03/16/2020] [Indexed: 06/10/2023]
Abstract
Genetic diversity is the bedrock of evolution. The "Genetic Erosion" hypothesis posits that environmental pollution could cause reduced genetic diversity. To explore the effects of heavy metal pollution on genetic diversity in natural populations, we selected an area with more than sixty years of heavy metal contamination (Baiyin, BY) and a relatively unpolluted one (Liujiaxia, LJX), and tree sparrow (Passer montanus) as study models. Five tree sparrow populations were sampled in BY at sites differing in heavy metal pollution level. Lower genetic diversity based on seven microsatellite loci was observed in the five tree sparrow populations from BY compared with those from LJX. Analysis of molecular variance indicated no significant genetic differentiation between BY and LJX. However, the observed heterozygosity and allelic richness were negatively correlated to the lead and cadmium concentrations in the primary feathers of tree sparrow. Our results indicated the genetic diversity might have a negative response to long-term environmental heavy metal pollution in tree sparrow, supporting the "Genetic Erosion" hypothesis. Therefore, the findings shed lights on the possible effects of heavy metal pollution on genetic diversity of wild bird populations.
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Affiliation(s)
- Wenzhi Yang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Jian Ding
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Shengnan Wang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Ying Yang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Gang Song
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yingmei Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China.
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Rybak AV, Belykh ES, Maystrenko TA, Shadrin DM, Pylina YI, Chadin IF, Velegzhaninov IO. Genetic analysis in earthworm population from area contaminated with radionuclides and heavy metals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 723:137920. [PMID: 32213403 DOI: 10.1016/j.scitotenv.2020.137920] [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: 09/24/2019] [Revised: 03/12/2020] [Accepted: 03/12/2020] [Indexed: 06/10/2023]
Abstract
This study assessed the effects of environmental contamination by naturally occurring radionuclides and heavy metals on the genetic structure of a population of the earthworm Aporrectodea caliginosa. A. caliginosa were collected from four sites and characterized by amplified fragment length polymorphism (AFLP) analyses. No differences in genetic structure and diversity were found between sites that differed greatly in soil contamination levels of radionuclides and metals. However, when the genetic structure of the A. caliginosa population was analyzed without considering information about the sampling site, a complex intraspecific genetic structure was identified. At least three highly divergent lineages were found, in unequal proportions, of each genetically isolated group from each study site. No associations were found between the distribution of the detected genetic clusters and the geographical origin of the samples. Thus, no noticeable adaptive changes or signs of directional selection were detected, despite the long history of genotoxic waste disposal at the sampling site. These results suggest a combined effect of three factors on the genetic structure and diversity of A. caliginosa in soils: the complexity of the contaminant composition, the heterogeneous spatial distribution of the pollutants, and the complexity of the intraspecific genetic structures of A. caliginosa.
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Affiliation(s)
- Anna V Rybak
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Elena S Belykh
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Tatiana A Maystrenko
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia.
| | - Dmitry M Shadrin
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Yana I Pylina
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Ivan F Chadin
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia.
| | - Ilya O Velegzhaninov
- Institute of Biology of Komi Science Centre of Ural Branch of RAS, Syktyvkar 167982, Russia; Polytechnical Institute of Vyatka State University, Kirov 610020, Russia.
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Veldkornet D, Rajkaran A, Paul S, Naidoo G. Oil induces chlorophyll deficient propagules in mangroves. MARINE POLLUTION BULLETIN 2020; 150:110667. [PMID: 31689609 DOI: 10.1016/j.marpolbul.2019.110667] [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: 06/25/2019] [Accepted: 10/11/2019] [Indexed: 06/10/2023]
Abstract
In Australia, some trees of the mangrove, Avicennia marina, growing in a chronic oil polluted site, produce chlorophyll deficient (albino) propagules. We tested the hypothesis that albinism was due to an oil-induced mutant allele that controls photosynthesis. We determined whether there are genetic differences between normal and chlorophyll deficient propagules. Four gene regions (nuclear 18S-26S cistron; chloroplast - trnH-psbA, rsp16 and matK) were sequenced and analysed for normal and albino propagules. Mutations occurred in both nuclear (ITS) and coding chloroplast (matK) genes of albino propagules. There were 10 mutational differences between normal and albino propagules in the matK samples. Analysis of molecular variation (AMOVA) of the matK dataset indicated highly significant genetic differentiation between normal and albino propagules. Our study suggests for the first time that PAHs from a chronic oil polluted site resulted in mutations in both nuclear and chloroplast genes, resulting in the production of albino propagules.
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Affiliation(s)
- Dimitri Veldkornet
- Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa
| | - Anusha Rajkaran
- Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa
| | - Swapan Paul
- Sydney Olympic Park Authority, Sydney, Australia
| | - Gonasageran Naidoo
- University of KwaZulu-Natal, School of Life Sciences, Westville, South Africa.
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6
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Spurgeon DJ. Higher than … or lower than ….? Evidence for the validity of the extrapolation of laboratory toxicity test results to predict the effects of chemicals and ionising radiation in the field. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 211:105757. [PMID: 29970267 DOI: 10.1016/j.jenvrad.2018.06.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 06/06/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
Single species laboratory tests and associated species sensitivity distributions (SSDs) that utilise the resulting data can make a key contribution to efforts to prospective hazard assessments for pesticides, biocides, metals and ionising radiation for research and regulatory risk assessment. An assumption that underlies the single species based toxicity testing approach when combined in SSD models is that the assessments of sensitivities to chemical and ionising radiation measured across a range of species in the laboratory can inform on the likely effects on communities present in the field. Potential issues with the validity of this assumption were already recognised by Van Straalen and Denneman (1989) in their landmark paper on the SSD methodology. In this work, they identified eight major factors that could potentially compromise the extrapolation of laboratory toxicity data to the field. Factors covered a range of issues related to differences in chemistry (e.g. bioavailability, mixtures); environmental conditions (optimal, variable), ecological (compensatory, time-scale) and population genetic structure (adaptation, meta-population dynamics). This paper outlines the evidence pertaining to the influence of these different factors on toxicity in the laboratory as compared to the field focussing especially on terrestrial ecosystems. Through radiological and ecotoxicological research, evidence of the influence of each factor on the translation of observed toxicity from the laboratory to field is available in all cases. The importance of some factors, such as differences in chemical bioavailability between laboratory tests and the field and the ubiquity of exposure to mixtures is clearly established and has some relevance to radiological protection. However, other factors such as the differences in test conditions (optimal vs sub-optimal) and the development of tolerance may be relevant on a case by case basis. When SSDs generated from laboratory tests have been used to predict chemical and ionising radiation effects in the field, results have indicated that they may often seem to under-predict impacts, although this may also be due to other factors such as the effects of other non-chemical stressors also affecting communities at polluted sites. A better understanding of the main factors affecting this extrapolation can help to reduce uncertainty during risk assessment.
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Affiliation(s)
- David J Spurgeon
- Centre for Ecology and Hydrology, MacLean Building, Benson Lane, Wallingford, Oxon, OX10 8BB, UK.
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7
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Gouin N, Bertin A, Espinosa MI, Snow DD, Ali JM, Kolok AS. Pesticide contamination drives adaptive genetic variation in the endemic mayfly Andesiops torrens within a semi-arid agricultural watershed of Chile. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 255:113099. [PMID: 31600702 DOI: 10.1016/j.envpol.2019.113099] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 08/01/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
Agrichemical contamination can provoke evolutionary responses in freshwater populations. It is a particularly relevant issue in semi-arid regions due to the sensitivity of endemic species to pollutants and to interactions with temperature stress. This paper investigates the presence of pesticides in rivers within a semi-arid agricultural watershed of Chile, testing for their effects on population genetic characteristics of the endemic mayfly Andesiops torrens (Insecta, Ephemeroptera). Pesticides were detected in sediment samples in ten out of the 30 sites analyzed throughout the upper part of the Limarí watershed. To study the evolutionary impact of such contamination on A. torrens, we used a genome-wide approach and analyzed 2056 single nucleotide polymorphisms (SNPs) loci in 551 individuals from all sites. Genetic differentiation was weak between populations, suggesting high gene flow across the study area. While we did not find evidence of pesticide effects on genetic diversity nor on population differentiation, the allele frequency of three outlier SNP loci correlated significantly with pesticide occurrence. Interrogation of genomic resources indicates that two of these SNPs are located within functional genes that encode for the low-density lipoprotein receptor-related protein 2 and Dumpy, both potentially involved in insect cuticle resistance processes. Such genomic signatures of local adaptation are indicative of past adverse effects of pesticide exposure on the locally adapted populations. Our results reveal that A. torrens is sensitive to pesticide exposure, but that a high gene flow may confer resilience to contamination. This research supports the contention that A. torrens is an ideal model organism to study evolutionary responses induced by pesticides on non-target, endemic species.
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Affiliation(s)
- Nicolas Gouin
- Departamento de Biología, Universidad de La Serena, Raúl Bitrán, 1305, La Serena, Chile; Instituto de Investigación Multidisciplinar en Ciencia y Tecnología, Universidad de La Serena, La Serena, Chile; Centro de Estudios Avanzados Zonas en Áridas, Raúl Bitrán, 1305, La Serena, Chile.
| | - Angéline Bertin
- Departamento de Biología, Universidad de La Serena, Raúl Bitrán, 1305, La Serena, Chile.
| | - Mara I Espinosa
- Departamento de Biología, Universidad de La Serena, Raúl Bitrán, 1305, La Serena, Chile.
| | - Daniel D Snow
- Nebraska Water Center, University of Nebraska-Lincoln, Lincoln, NE, 68583-0844, United States.
| | - Jonathan M Ali
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, Omaha, NE, USA.
| | - Alan S Kolok
- Idaho Water Resources Research Institute, University of Idaho, Moscow, ID, 83844-3002, United States.
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8
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Fuller N, Ford AT, Lerebours A, Gudkov DI, Nagorskaya LL, Smith JT. Chronic radiation exposure at Chernobyl shows no effect on genetic diversity in the freshwater crustacean, Asellus aquaticus thirty years on. Ecol Evol 2019; 9:10135-10144. [PMID: 31624541 PMCID: PMC6787803 DOI: 10.1002/ece3.5478] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/19/2019] [Accepted: 07/02/2019] [Indexed: 12/17/2022] Open
Abstract
Analysis of genetic diversity represents a fundamental component of ecological risk assessments in contaminated environments. Many studies have assessed the genetic implications of chronic radiation exposure at Chernobyl, generally recording an elevated genetic diversity and mutation rate in rodents, plants, and birds inhabiting contaminated areas. Only limited studies have considered genetic diversity in aquatic biota at Chernobyl, despite the large number of freshwater systems where elevated dose rates will persist for many years. Consequently, the present study aimed to assess the effects of chronic radiation exposure on genetic diversity in the freshwater crustacean, Asellus aquaticus, using a genome-wide SNP approach (Genotyping-by-sequencing). It was hypothesized that genetic diversity in A. aquaticus would be positively correlated with dose rate. A. aquaticus was collected from six lakes in Belarus and the Ukraine ranging in dose rate from 0.064 to 27.1 µGy/hr. Genotyping-by-sequencing analysis was performed on 74 individuals. A significant relationship between geographical distance and genetic differentiation confirmed the Isolation-by-Distance model. Conversely, no significant relationship between dose rate and genetic differentiation suggested no effect of the contamination gradient on genetic differentiation between populations. No significant relationship between five measures of genetic diversity and dose rate was recorded, suggesting that radiation exposure has not significantly influenced genetic diversity in A. aquaticus at Chernobyl. This is the first study to adopt a genome-wide SNP approach to assess the impacts of environmental radiation exposure on biota. These findings are fundamental to understanding the long-term success of aquatic populations in contaminated environments at Chernobyl and Fukushima.
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Affiliation(s)
- Neil Fuller
- Institute of Marine Sciences, School of Biological SciencesUniversity of PortsmouthPortsmouthUK
| | - Alex T. Ford
- Institute of Marine Sciences, School of Biological SciencesUniversity of PortsmouthPortsmouthUK
| | - Adélaïde Lerebours
- Institute of Marine Sciences, School of Biological SciencesUniversity of PortsmouthPortsmouthUK
| | - Dmitri I. Gudkov
- Department of Freshwater RadioecologyInstitute of HydrobiologyKievUkraine
| | - Liubov L. Nagorskaya
- Applied Science Center for Bioresources of the National Academy of Sciences of BelarusMinskBelarus
| | - Jim T. Smith
- School of Earth & Environmental SciencesUniversity of PortsmouthPortsmouthUK
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9
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Tarnawska M, Kafel A, Augustyniak M, Rost-Roszkowska M, Babczyńska A. Microevolution or wide tolerance? Level of stress proteins in the beet armyworm Spodoptera eqigua hübner (Lepidoptera: Noctuidae) exposed to cadmium for over 150 generations. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 178:1-8. [PMID: 30980963 DOI: 10.1016/j.ecoenv.2019.04.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 04/02/2019] [Accepted: 04/04/2019] [Indexed: 06/09/2023]
Abstract
The aim of this study was to investigate whether the cadmium tolerance developed in the beet armyworm Spodoptera exigua selected for over 150 generations may be related to synthesis of the stress proteins metallothioneins (Mts) and 70 kDa heat shock proteins (HSP70). To achieve this, six S. exigua strains (control, k), 150-generation Cd exposure strain (cd), and four 18-generation Cd exposure strains differing in Cd concentration (cd44, cd22, cd11, cd5) were reared. Stress protein level was measured in the midgut of the 5th larval stage after 1-6, 12 and 18 generations. Cd contents was measured in the pupae. Unlike Cd concentration, which depended on metal contents in food but was not generation-dependent, the pattern of Mts and HSP70 concentrations changed in experimental strains from generation to generation. Stress protein levels in the insects exposed to the highest Cd concentration (the same as in the 150-generation Cd exposure strain), initially higher than in the control strain, after the 12th generation did not differ from the level measured in the control strains. It seems therefore that stress proteins play a protective role in insects of lower tolerance to cadmium. The tolerance developed during multigenerational exposure probably relies on mechanisms other than Mt and HSP70 synthesis.
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Affiliation(s)
- Monika Tarnawska
- Department of Animal Physiology and Ecotoxicology, University of Silesia, Bankowa 9, 40007, Katowice, Poland
| | - Alina Kafel
- Department of Animal Physiology and Ecotoxicology, University of Silesia, Bankowa 9, 40007, Katowice, Poland
| | - Maria Augustyniak
- Department of Animal Physiology and Ecotoxicology, University of Silesia, Bankowa 9, 40007, Katowice, Poland
| | - Magdalena Rost-Roszkowska
- Department of Histology and Animal Histology, University of Silesia, Bankowa 9, 40007, Katowice, Poland
| | - Agnieszka Babczyńska
- Department of Animal Physiology and Ecotoxicology, University of Silesia, Bankowa 9, 40007, Katowice, Poland.
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10
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Evolutionary Toxicogenomics of the Striped Killifish ( Fundulus majalis) in the New Bedford Harbor (Massachusetts, USA). Int J Mol Sci 2019; 20:ijms20051129. [PMID: 30841640 PMCID: PMC6429206 DOI: 10.3390/ijms20051129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/18/2019] [Accepted: 02/23/2019] [Indexed: 12/27/2022] Open
Abstract
In this paper, we used a Genotyping-by-Sequencing (GBS) approach to find and genotype more than 4000 genome-wide SNPs (Single Nucleotide Polymorphisms) from striped killifish exposed to a variety of polychlorinated biphenyls (PCBs) and other aromatic pollutants in New Bedford Harbor (NBH, Massachusetts, USA). The aims of this study were to identify the genetic consequences of exposure to aquatic pollutants and detect genes that may be under selection. Low genetic diversity (HE and π) was found in the site exposed to the highest pollution level, but the pattern of genetic diversity did not match the pollution levels. Extensive connectivity was detected among sampling sites, which suggests that balanced gene flow may explain the lack of genetic variation in response to pollution levels. Tests for selection identified 539 candidate outliers, but many of the candidate outliers were not shared among tests. Differences among test results likely reflect different test assumptions and the complex pollutant mixture. Potentially, selectively important loci are associated with 151 SNPs, and enrichment analysis suggests a likely involvement of these genes with pollutants that occur in NBH. This result suggests that selective processes at genes targeted by pollutants may be occurring, even at a small geographical scale, and may allow the local striped killifish to resist the high pollution levels.
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11
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Vittecoq M, Giraudeau M, Sepp T, Marcogliese DJ, Klaassen M, Renaud F, Ujvari B, Thomas F. Turning natural adaptations to oncogenic factors into an ally in the war against cancer. Evol Appl 2018; 11:836-844. [PMID: 29928293 PMCID: PMC5999213 DOI: 10.1111/eva.12608] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 01/25/2018] [Indexed: 12/14/2022] Open
Abstract
Both field and experimental evolution studies have demonstrated that organisms naturally or artificially exposed to environmental oncogenic factors can, sometimes rapidly, evolve specific adaptations to cope with pollutants and their adverse effects on fitness. Although numerous pollutants are mutagenic and carcinogenic, little attention has been given to exploring the extent to which adaptations displayed by organisms living in oncogenic environments could inspire novel cancer treatments, through mimicking the processes allowing these organisms to prevent or limit malignant progression. Building on a substantial knowledge base from the literature, we here present and discuss this progressive and promising research direction, advocating closer collaboration between the fields of medicine, ecology, and evolution in the war against cancer.
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Affiliation(s)
- Marion Vittecoq
- Institut de Recherche de la Tour du Valat Arles France.,CREEC/MIVEGEC IRD CNRS University of Montpellier Montpellier France
| | - Mathieu Giraudeau
- School of Life Sciences Arizona State University Tempe AZ USA.,Centre for Ecology & Conservation College of Life and Environmental Sciences University of Exeter Penryn UK
| | - Tuul Sepp
- School of Life Sciences Arizona State University Tempe AZ USA.,Department of Zoology University of Tartu Tartu Estonia
| | - David J Marcogliese
- Aquatic Contaminants Research Division Water Science and Technology Directorate Environment and Climate Change Canada St. Lawrence Centre Montreal QC Canada.,Fisheries and Oceans Canada St. Andrews Biological Station St. Andrews NB Canada
| | - Marcel Klaassen
- School of Life and Environmental Sciences Centre for Integrative Ecology Deakin University Deakin Vic. Australia
| | - François Renaud
- CREEC/MIVEGEC IRD CNRS University of Montpellier Montpellier France
| | - Beata Ujvari
- School of Life and Environmental Sciences Centre for Integrative Ecology Deakin University Deakin Vic. Australia.,School of Biological Sciences University of Tasmania Hobart TAS Australia
| | - Frédéric Thomas
- CREEC/MIVEGEC IRD CNRS University of Montpellier Montpellier France
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12
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Cheng LY, Yang CZ, Li HZ, Li M, Bai AM, Ouyang Y, Hu YJ. Probing the interaction of cephalosporin with bovine serum albumin: A structural and comparative perspective. LUMINESCENCE 2017; 33:209-218. [PMID: 28976065 DOI: 10.1002/bio.3403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 08/05/2017] [Accepted: 08/12/2017] [Indexed: 01/03/2023]
Abstract
Cephalosporins belong the largest class of antibiotics used in the treatment of a wide range of infectious diseases caused by susceptible organisms. In the present study, we chose two typical antibiotics cefalexin/cefixime based on their structure, and investigated the interaction of cephalexin/cefixime with bovine serum albumin (BSA) using UV-vis absorption spectra, fluorescence spectroscopy, circular dichroism (CD) spectroscopy and molecular modeling approaches. Spectroscopic experiments revealed the formation of a BSA - cefalexin/cefixime complex. The binding parameters calculated using a modified Stern - Volmer method and the Scatchard method reached 103 -104 L·mol-1 . Thermodynamic parameter studies revealed that binding characteristics by negative enthalpy and positive entropy changes, and electrostatic interactions play a major role. Site marker competitive displacement experiments and molecular modeling approaches demonstrated that cefalexin and cefixime bind with appropriate affinity to site I (subdomain IIA) of BSA. Furthermore, synchronous fluorescence spectra, CD spectra and molecular modeling results indicated that the secondary structure of BSA was changed in the presence of cefalexin and cefixime. Additionally, the effects of metal ions on the BSA - cefalexin/cefixime system were also assessed.
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Affiliation(s)
- Li-Yang Cheng
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi, People's Republic of China
| | - Cheng-Zhang Yang
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi, People's Republic of China
| | - Hui-Zi Li
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi, People's Republic of China
| | - Min Li
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi, People's Republic of China
| | - Ai-Min Bai
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi, People's Republic of China
| | - Yu Ouyang
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi, People's Republic of China
| | - Yan-Jun Hu
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi, People's Republic of China.,Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Wuhan University, Wuhan, People's Republic of China
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Pedrosa JAM, Cocchiararo B, Verdelhos T, Soares AMVM, Pestana JLT, Nowak C. Population genetic structure and hybridization patterns in the cryptic sister species Chironomus riparius and Chironomus piger across differentially polluted freshwater systems. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 141:280-289. [PMID: 28359994 DOI: 10.1016/j.ecoenv.2017.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Revised: 03/02/2017] [Accepted: 03/06/2017] [Indexed: 06/07/2023]
Abstract
Chironomids are an integral and functionally important part of many freshwater ecosystems. Yet, to date, there is limited understanding of their microevolutionary processes under chemically polluted natural environments. In this study, we investigated the genetic variation within populations of the ecotoxicological model species Chironomus riparius and its cryptic sister species Chironomus piger at 18 metal-contaminated and reference sites in northwestern Portugal. Microsatellite analysis was conducted on 909 samples to answer if metal contamination affects genetic variation in natural chironomid populations as previously suggested from controlled laboratory experiments. Similarly high levels of genetic diversity and significant but weak genetic substructuring were found across all sites and temporal replicates, with no effects of metal contamination on the genetic variation or species' abundance, although C. piger tended to be less frequent at highly contaminated sites. Our results indicate that high levels of gene flow and population dynamic processes may overlay potential pollutant effects. At least for our study species, we conclude that the "genetic erosion hypothesis", which suggests that chemical pollution will reduce genome-wide genetic variability in affected populations, does not hold under natural conditions. Interestingly, our study provides evidence of successful hybridization between the two sister species under natural conditions.
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Affiliation(s)
- João A M Pedrosa
- Department of Biology & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal; Conservation Genetics Group, Senckenberg Research Institute and Natural History Museum Frankfurt, Clamecystrasse 12, 63571 Gelnhausen, Germany.
| | - Berardino Cocchiararo
- Conservation Genetics Group, Senckenberg Research Institute and Natural History Museum Frankfurt, Clamecystrasse 12, 63571 Gelnhausen, Germany
| | - Tiago Verdelhos
- MARE - Marine and Environmental Sciences Centre, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Amadeu M V M Soares
- Department of Biology & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - João L T Pestana
- Department of Biology & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Carsten Nowak
- Conservation Genetics Group, Senckenberg Research Institute and Natural History Museum Frankfurt, Clamecystrasse 12, 63571 Gelnhausen, Germany
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14
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Giska I, Sechi P, Babik W. Deeply divergent sympatric mitochondrial lineages of the earthworm Lumbricus rubellus are not reproductively isolated. BMC Evol Biol 2015; 15:217. [PMID: 26438011 PMCID: PMC4595309 DOI: 10.1186/s12862-015-0488-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 09/14/2015] [Indexed: 11/10/2022] Open
Abstract
Background The accurate delimitation of species is essential to numerous areas of biological research. An unbiased assessment of the diversity, including the cryptic diversity, is of particular importance for the below ground fauna, a major component of global biodiversity. On the British Isles, the epigeic earthworm Lumbricus rubellus, which is a sentinel species in soil ecotoxicology, consists of two cryptic taxa that are differentiated in both the nuclear and the mitochondrial (mtDNA) genomes. Recently, several deeply divergent mtDNA lineages were detected in mainland Europe, but whether these earthworms also constitute cryptic species remains unclear. This information is important from an evolutionary perspective, but it is also essential for the interpretation and the design of ecotoxicological projects. In this study, we used genome-wide RADseq data to assess the reproductive isolation of the divergent mitochondrial lineages of L. rubellus that occur in sympatry in multiple localities in Central Europe. Results We identified five divergent (up to 16 % net p-distance) mitochondrial lineages of L. rubellus in sympatry. Because the clustering of the RADseq data was according to the population of origin and not the mtDNA lineage, reproductive isolation among the mtDNA lineages was not likely. Although each population contained multiple mtDNA lineages, subdivisions within the populations were not observed for the nuclear genome. The lack of fixed differences and sharing of the overwhelming majority of nuclear polymorphisms between localities, indicated that the populations did not constitute allopatric species. The nucleotide diversity within the populations was high, 0.7–0.8 %. Conclusions The deeply divergent mtDNA sympatric lineages of L. rubellus in Central Europe were not reproductively isolated groups. The earthworm L. rubellus, which is represented by several mtDNA lineages in continental Europe, apparently is a single highly polymorphic species rather than a complex of several cryptic species. This study demonstrated the critical importance of the use of multilocus nuclear data for the unbiased assessment of cryptic diversity and for the delimitation of species in soil invertebrates. Electronic supplementary material The online version of this article (doi:10.1186/s12862-015-0488-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Iwona Giska
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland.
| | - Pierfrancesco Sechi
- Institute of Ecosystem Study, Sassari, National Research Council, Traversa La Crucca 3, Regione Baldinca, 07100, Sassari, Italy.
| | - Wiesław Babik
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland.
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