Dimethylsulfoxide (DMSO) and related sulfur compounds in the Saguenay Fjord, Quebec

Lee, P A; Haase, R; Mora, Stephen J. de; Chanut, Jean-Pierre; Gosselin, Michel

doi:10.1139/f99-094

Cited by 18 publications

(4 citation statements)

References 22 publications

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“…These results suggest that DMSO could act to scavenge ROS under potential conditions of photo-oxidative stress within phytoplankton cells. The role of cellular ROSscavenging by DMSO has been previously proposed to explain variation in DMSPp : DMSOp ratios in phytoplankton (Vila-Costa et al 2006), DMSO concentrations in coral endosymbionts (Gardner et al 2017) and negative correlations between DMSO and Chl a (Lee et al 1999). Our results provide the first direct set of photo-physiological observations correlating DMSO concentrations with several proxies of oxidative stress in phytoplankton.…”

Section: Diel Cyclingsupporting

confidence: 65%

Potential roles of dimethysulfoxide in regional sulfur cycling and phytoplankton physiological ecology in the NE Subarctic Pacific

Herr

Dacey

Kiene

et al. 2020

Limnology & Oceanography

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We measured the concentration and turnover rates of dimethylsulfoxide (DMSO) across the northeast Subarctic Pacific (NESAP) to better understand the role of this compound in regional sulfur cycling and phytoplankton physiological ecology. Using ship-track observations and Lagrangian drifter surveys, we examined the spatial and temporal components of DMS and DMSO variability, comparing rates of DMSO reduction with simultaneous measurements of dimethylsulfide (DMS) oxidation and dimethylsulfoniopropionate (DMSP) cleavage. Our results show high concentrations and rapid turnover of DMSO across much of our NESAP survey region. DMS and DMSO concentrations ranged from < 1 nM to maxima of 26 nM and 183 nM, respectively, and exhibited a nonlinear positive relationship. Rate constants for DMSO reduction to DMS ranged from < 1 to 6.5 d −1 and were correlated to bacterial production and phytoplankton taxonomic composition. DMSO reduction rates exceeded dissolved DMSP cleavage at nearly all stations, and exceeded DMS oxidation rates at four stations where DMSO reduction and DMS oxidation were measured simultaneously. At these stations, net DMS production from DMSO ranged from 0.50 to 7.18 nM d −1. During our Lagrangian survey, DMSO concentrations decreased during periods of peak midday irradiance. A strong correlation between DMSO concentrations, nonphotochemical quenching and photochemical efficiency of photosystem II (F v /F m) suggest a potential role for DMSO in photo-protection, supporting previous suggestions of an anti-oxidant function for this molecule. Our findings highlight the potential contribution of DMSO to net DMS production in the NESAP, and suggest a role for this compound in phytoplankton physiological ecology.

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Section: Diel Cyclingsupporting

confidence: 65%

Potential roles of dimethysulfoxide in regional sulfur cycling and phytoplankton physiological ecology in the NE Subarctic Pacific

Herr

Dacey

Kiene

et al. 2020

Limnology & Oceanography

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“…These correlations were somewhat weak, which may result from a dependency on certain algae taxon and not on phytoplankton in general for both DMSP and DMSO. In contrast, Lee et al (1999b) found a negative correlation between DMSO p and Chl a in a Canadian fjord. They explained this observation with an increase in photosynthetic activity and, therefore, an increase in free radicals that reacted with DMSO.…”

Section: Influence Of Phytoplankton On the Dms Dmsp And Dmso Distribmentioning

confidence: 66%

“…Field measurements conducted by Lee et al (1999b) and culture experiments with dinoflagellates and haptophytes that showed high DMSO p production (Simó et al, 1998) suggested that DMSO p might be produced by a broad range of phytoplankton comparable to that of DMSP producing algae groups. The authors did not exclude that other species, which are not known as DMSP producers, might also be responsible for a significant amount of DMSO.…”

Section: Dmso and Phytoplankton Groupsmentioning

confidence: 99%

Sulphur compounds, methane, and phytoplankton: interactions along a north–south transit in the western Pacific Ocean

et al. 2013

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Abstract. Here we present results of the first comprehensive study of sulphur compounds and methane in the oligotrophic tropical western Pacific Ocean. The concentrations of dimethylsuphide (DMS), dimethylsulphoniopropionate (DMSP), dimethylsulphoxide (DMSO), and methane (CH4), as well as various phytoplankton marker pigments in the surface ocean were measured along a north–south transit from Japan to Australia in October 2009. DMS (0.9 nmol L−1), dissolved DMSP (DMSPd, 1.6 nmol L−1) and particulate DMSP (DMSPp, 2 nmol L−1) concentrations were generally low, while dissolved DMSO (DMSOd, 4.4 nmol L−1) and particulate DMSO (DMSOp, 11.5 nmol L−1) concentrations were comparably enhanced. Positive correlations were found between DMSO and DMSP as well as DMSP and DMSO with chlorophyll a, which suggests a similar source for both compounds. Similar phytoplankton groups were identified as being important for the DMSO and DMSP pool, thus, the same algae taxa might produce both DMSP and DMSO. In contrast, phytoplankton seemed to play only a minor role for the DMS distribution in the western Pacific Ocean. The observed DMSPp : DMSOp ratios were very low and seem to be characteristic of oligotrophic tropical waters representing the extreme endpoint of the global DMSPp : DMSOp ratio vs SST relationship. It is most likely that nutrient limitation and oxidative stress in the tropical western Pacific Ocean triggered enhanced DMSO production leading to an accumulation of DMSO in the sea surface. Positive correlations between DMSPd and CH4, as well as between DMSO (particulate and total) and CH4, were found along the transit. We conclude that DMSP and DMSO and/or their degradation products might serve as potential substrates for CH4 production in the oxic surface layer of the western Pacific Ocean.

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“…For DMSP and DMSO the same algae groups were identified as important sulphur producers but in different compositions dependent on the sulphur compound and the region. Field measurements conducted by Lee et al (1999b) and culture experiments with dinoflagellates and haptophytes that showed high DMSO p production (Simó et al, 1998) suggested that DMSO p might be produced by a broad range of phytoplankton comparable to that of DMSP producing algae groups. The authors did not exclude that other species, which are not known as DMSP producers, might also be responsible for a significant amount of DMSO.…”

Section: Dmso and Phytoplankton Groupsmentioning

confidence: 99%

Sulphur compounds, methane, and phytoplankton: interactions along a north-south transit in the western Pacific Ocean

Zindler¹,

Bracher²,

Marandino³

et al. 2012

Preprint

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Heterotrophic prokaryotic production (BP) was studied in the Western Tropical South Pacific using the leucine technique. Integrated over the euphotic zone, BP ranged from 58-120 mg C m-2 d-1 within the 20 Melanesian Archipelago, and from 31-50 mg C m-2 d-1 within the subtropical gyre. Nitrogen was often one of the main factor controlling BP on short time scale as shown using enrichment experiments, followed by dissolved inorganic phosphate (DIP) near the surface and labile organic carbon deeper in the euphotic zone. WithN 2 fixation being one of the most important fluxes fueling new production, we explored relationships between BP, primary production (PP) and N 2 fixation rates. BP variability was better explained by the variability of N 2 25 fixation rates than by that of PP in surface waters of the Melanesian Archipelago, which were characterized by N depleted layers, and low DIP turnover times (T DIP < 100 h). However, BP was more significantly correlated with PP but not with N 2 fixation rates where DIP was more available (T DIP > 100 h), i.e. in a layer deeper than the euphotic zone-including the deep chlorophyll maximum depths-in the Melanesian Archipelago, or within the entire euphotic zone in the subtropical gyre. Bacterial growth efficiency (BGE) ranged from 6-10 %. Applying 30 correcting factors to estimate gross primary production and correcting BP for Prochlorococcus assimilation of leucine, we showed a large variability in the contribution of gross primary production to bacterial C demand. Exploration of a bloom collapse at one site south of Vanuatu showed the importance of blooms, which can persist over extensive distance for long periods of time, and can maintaining net autotrophy where they occur. Using a Lagragian sampling strategy during 6 days, long duration sites allowed for the study of the rapid 35 changes including BP, primary production and BGE, that occurred during the bloom collapse.

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Dimethylsulfoxide (DMSO) and related sulfur compounds in the Saguenay Fjord, Quebec

Cited by 18 publications

References 22 publications

Potential roles of dimethysulfoxide in regional sulfur cycling and phytoplankton physiological ecology in the NE Subarctic Pacific

Potential roles of dimethysulfoxide in regional sulfur cycling and phytoplankton physiological ecology in the NE Subarctic Pacific

Sulphur compounds, methane, and phytoplankton: interactions along a north–south transit in the western Pacific Ocean

Sulphur compounds, methane, and phytoplankton: interactions along a north-south transit in the western Pacific Ocean

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