Effects of a parental exposure to diuron on Pacific oyster spat methylome

Type Article
Date 2017-01
Language English
Author(s) Rondon Sallan Rodolfo1, 2, Grunau ChristophORCID2, Fallet Manon2, Charlemagne Nicolas3, Sussarellu RossanaORCID3, Chaparro CristianORCID2, Montagnani CarolineORCID1, Mitta GuillaumeORCID2, Bachere Evelyne1, Akcha Farida3, Cosseau Celine2
Affiliation(s) 1 : Ifremer, IHPE UMR 5244, Univ. Perpignan Via Domitia, CNRS, Univ. Montpellier, F-34095 Montpellier, France
2 : Univ. Perpignan Via Domitia, IHPE UMR 5244, CNRS, IFREMER, Univ. Montpellier, F-66860 Perpignan, France
3 : Ifremer, Department of Biogeochemistry and Ecotoxicology, Laboratory of Ecotoxicology, Rue de l’ile d’Yeu, BP 21105, 44311 Nantes Cedex 03, France
Source Environmental Epigenetics (2058-5888), 2017-01 , Vol. 3 , N. 1 , P. 13p.
DOI 10.1093/eep/dvx004
WOS© Times Cited 33
Keyword(s) Crassostrea gigas, mollusk, DNA methylation, herbicide, epigenetic

Environmental epigenetic is an emerging field that studies the cause-effect relationship between environmental factors and heritable trait via an alteration in epigenetic marks. This field has received much attentions since the impact of environmental factors on different epigenetic marks have been shown to be associated with a broad range of phenotypic disorders in natural ecosystems. Chemical pollutants have been shown to affect immediate epigenetic information carriers of several aquatic species but the heritability of the chromatin marks and the consequences for long term adaptation remain open questions. In this work, we investigated the impact of the diuron herbicide on the DNA methylation pattern of spat from exposed Crassotrea gigas genitors. This oyster is one of the most important mollusk species produced worldwide and a key coastal economic resource in France. The whole genome bisulfite sequencing (WGBS, BS-Seq) was applied to obtain a methylome at single nucleotide resolution on DNA extracted from spat issued from diuron exposed genitors comparatively to control spat. We showed that the parental diuron exposure has an impact on the DNA methylation pattern of its progeny. Most of the differentially methylated regions occurred within coding sequences and we showed that this change in methylation level correlates with RNA level only in a very small group of genes. Although the DNA methylation profile is variable between individuals, we showed conserved DNA methylation patterns in response to parental diuron exposure. This relevant result opens perspectives for the setting of new markers based on epimutations as early indicators of marine pollutions.

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Rondon Sallan Rodolfo, Grunau Christoph, Fallet Manon, Charlemagne Nicolas, Sussarellu Rossana, Chaparro Cristian, Montagnani Caroline, Mitta Guillaume, Bachere Evelyne, Akcha Farida, Cosseau Celine (2017). Effects of a parental exposure to diuron on Pacific oyster spat methylome. Environmental Epigenetics, 3(1), 13p. Publisher's official version : https://doi.org/10.1093/eep/dvx004 , Open Access version : https://archimer.ifremer.fr/doc/00602/71413/