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Dimethylsulfoniopropionate and dimethylsulfoxide in Posidonia oceanica

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Abstract

The present work aims at determining the natural variability of dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) contents in the seagrass Posidonia oceanica, which is the largest producer of these molecules reported to date among coastal autotrophs. Seagrass leaf samples were collected during a period of 3.5 years in the pristine Revellata Bay (Calvi, northwestern Corsica, France). The DMSP content ranged from 25 to 265 µmol.gfw−1; DMSO from 1.0 to 13.9 µmol.gfw−1. The dynamics of the two molecules were closely linked, the DMSO content being equivalent to 3.5% of the DMSP content, all leaf samples considered (n = 423 samples and 414 DMSP(O) data pairs). The annual growth cycle of the seagrass diluted the initial stocks of the two molecules. Temperature indirectly affected molecule content dynamics through their direct effect on the seagrass productivity and biomass. Inter-annual variations in DMSP(O) content in relation to shallow water temperature might further indicate that DMSP(O) could have been involved in the physiological response of P. oceanica to heat stress. Finally, middle-aged leaf tissues with an organosulfur molecule content similar to the average value calculated for the seagrass leaf bundle appeared to be the best choice of sample material to study DMSP and DMSO in that species. More research is needed to elucidate the biosynthetic pathways of these molecules in seagrasses, the evolutionary reasons for such a high production in P. oceanica and the physiological functions they play.

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Data availability

DMSP(O) and temperature data are published alongside the paper (Mendeley Data repository, https://doi.org/10.17632/y65hzhbfsk.1).

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Out of scope.

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Acknowledgements

This work was funded by the Fonds National de la Recherche Scientifique (FNRS) (Fellowship-Grant 1237018F and contract 2.4.637.10). Authors thank Pr R. Koenker from the Department of Economics, University College London, UK for his help in quantile regression. At the time of this study, J. Richir was a postdoctoral researcher at the FNRS. J. Richir current affiliation is Centre d′Ecologie et des Sciences de la Conservation (CESCO), Muséum national d′Histoire naturelle, Station de Biologie Marine, Concarneau, France. A. V. Borges is a research director at the FNRS. JdF was supported by NWO Open Competition #ALWOP.203.

Funding

Funding was provided by F.R.S-FNRS for salary and material, and by the STARESO via the STARECAPMED program for fieldwork.

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Contributions

JR: conceptualization, data curation, formal analysis, funding acquisition, investigation, validation, visualization, writing—original draft, writing—review and editing. WC: conceptualization, investigation, validation, writing—review and editing. JF: formal analysis, investigation, writing—review and editing. AVB: conceptualization, funding acquisition, methodology, resources, supervision, writing—review and editing.

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Correspondence to Jonathan Richir or Alberto V. Borges.

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No conflict of interest.

Ethical approval

Authors had all the necessary authorizations for seagrass sampling, and used a little invasive, non-destructive technique that ensures the post-regrowth of sampled tissues.

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Richir, J., Champenois, W., de Fouw, J. et al. Dimethylsulfoniopropionate and dimethylsulfoxide in Posidonia oceanica. Mar Biol 168, 159 (2021). https://doi.org/10.1007/s00227-021-03961-5

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  • DOI: https://doi.org/10.1007/s00227-021-03961-5

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