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dc.contributor.authorNybakken, Line
dc.contributor.authorLee, YeonKyeong
dc.contributor.authorBrede, Dag Anders
dc.contributor.authorMageroy, Melissa
dc.contributor.authorLind, Ole Christian
dc.contributor.authorSalbu, Brit
dc.contributor.authorKashparov, Valerii
dc.contributor.authorOlsen, Jorunn Elisabeth
dc.date.accessioned2023-10-31T07:06:01Z
dc.date.available2023-10-31T07:06:01Z
dc.date.created2023-10-05T11:14:49Z
dc.date.issued2023
dc.identifier.citationScience of the Total Environment. 2023, 904 1-11.
dc.identifier.issn0048-9697
dc.identifier.urihttps://hdl.handle.net/11250/3099555
dc.description.abstractThe Chernobyl Nuclear Power Plant (ChNPP) accident in 1986 resulted in extremely high levels of acute ionising radiation, that killed or damaged Scots pine (Pinus sylvestris) trees in the surrounding areas. Dead trees were cleared and buried, and new plantations established a few years later. Today, more than three decades later, gamma and beta-radiation near the ChNPP is still elevated compared with ambient levels but have decreased by a factor of 300 and 100, respectively. In the present work, Scots pine-trees growing at High (220 μGy h−1), Medium (11 μGy h−1), and Low (0.2 μGy h−1) total (internal + external) dose rates of chronically elevated ionising radiation in the Chernobyl Exclusion zone were investigated with respect to possible damage to DNA, cells and organelles, as well as potentially increased levels of phenolic and terpenoid antioxidants. Scots pine from the High and Medium radiation sites had elevated levels of DNA damage in shoot tips and needles as shown by the COMET assay, as well as increased numbers of resin ducts and subcellular abnormalities in needles. Needles from the High radiation site showed elevated levels of monoterpenes and condensed tannins compared with those from the other sites. In conclusion, more than three decades after the ChNPP accident substantial DNA damage and (sub)cellular effects, but also mobilisation of stress-protective substances possessing antioxidant activity were observed in Scots pine trees growing at elevated levels of ionising radiation. This demonstrates that the radiation levels in the Red Forest still significantly impact the plant community.
dc.language.isoeng
dc.titleLong term effects of ionising radiation in the Chernobyl Exclusion zone on DNA integrity and chemical defence systems of Scots pine (Pinus sylvestris)
dc.title.alternativeLong term effects of ionising radiation in the Chernobyl Exclusion zone on DNA integrity and chemical defence systems of Scots pine (<i>Pinus sylvestris</i>)
dc.title.alternativeLong term effects of ionising radiation in the Chernobyl Exclusion zone on DNA integrity and chemical defence systems of Scots pine (Pinus sylvestris)
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersion
dc.source.pagenumber1-11
dc.source.volume904
dc.source.journalScience of the Total Environment
dc.identifier.doi10.1016/j.scitotenv.2023.166844
dc.identifier.cristin2181971
dc.relation.projectNorges forskningsråd: 223268
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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