Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 54, Issue 13, Pages 7858-7869Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.0c01438
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Funding
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Education [NRF-2019R1A6A1A10073079]
- National Research Foundation of Korea [NRF-2020R11A1A01074607]
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Ocean acidification (OA) is caused by changes in ocean carbon chemistry due to increased atmospheric pCO(2) and is predicted to have deleterious effects on marine ecosystems. While the potential impacts of OA on many marine species have been studied, the multigenerational effects on asexual organisms remain unknown. We found that low seawater pH induced oxidative stress and DNA damage, decreasing growth rates, fecundity, and lifespans in the parental generation, whereas deleterious effects on in vivo endpoints in F1 and F2 offspring were less evident. The findings suggest that multigenerational adaptive effects play a role in antioxidant abilities and other defense mechanisms. OA-induced DNA damage, including double-strand breaks (DSBs), was fully repaired in F1 offspring of parents exposed to OA for 7 days, indicating that an adaptation mechanism may be the major driving force behind multigenerational adaptive effects. Analysis of epigenetic modification in response to OA involved examination of histone modification of DNA repair genes and a chromatin immunoprecipitation assay, as Bornbus koreanus has no methylation pattern for CpG in its genome. We conclude that DSBs, DNA repair, and histone modification play important roles in multigenerational plasticity in response to OA in an asexual monogonont rotifer.
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