New and important roles for DMSP in marine microbial communities

Kiene, Ronald P.; Linn, Laura J.; Bruton, Jody A.

doi:10.1016/s1385-1101(00)00023-x

Cited by 523 publications

(538 citation statements)

References 57 publications

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“…DMSP is typically considered a preferred source of sulfur (S) for marine microorganisms (Simó , 2001), as it can be demethylated and then demethiolated to MeSH and used to synthesize methionine and cysteine (Kiene et al, 2000). Although sulfate is much more abundant than DMSP in seawater (mM concentrations instead of nM), there are energetic advantages to taking up S that is already reduced.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic analysis of a marine bacterial community enriched with dimethylsulfoniopropionate

et al. 2010

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Dimethylsulfoniopropionate (DMSP) is an important source of reduced sulfur and carbon for marine microbial communities, as well as the precursor of the climate-active gas dimethylsulfide (DMS). In this study, we used metatranscriptomic sequencing to analyze gene expression profiles of a bacterial assemblage from surface waters at the Bermuda Atlantic Time-series Study (BATS) station with and without a short-term enrichment of DMSP (25 nM for 30 min). An average of 303 143 reads were obtained per treatment using 454 pyrosequencing technology, of which 51% were potential protein-encoding sequences. Transcripts from Gammaproteobacteria and Bacteroidetes increased in relative abundance on DMSP addition, yet there was little change in the contribution of two bacterioplankton groups whose cultured members harbor known DMSP degradation genes, Roseobacter and SAR11. The DMSP addition led to an enrichment of transcripts supporting heterotrophic activity, and a depletion of those encoding light-related energy generation. Genes for the degradation of C3 compounds were significantly overrepresented after DMSP addition, likely reflecting the metabolism of the C3 component of DMSP. Mapping these transcripts to known biochemical pathways indicated that both acetyl-CoA and succinyl-CoA may be common entry points of this moiety into the tricarboxylic acid cycle. In a short time frame (30 min) in the extremely oligotrophic Sargasso Sea, different gene expression patterns suggest the use of DMSP by a diversity of marine bacterioplankton as both carbon and sulfur sources.

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Section: Discussionmentioning

confidence: 99%

Transcriptomic analysis of a marine bacterial community enriched with dimethylsulfoniopropionate

et al. 2010

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“…Early research focused on the production of DMS, as it is the major source of non-sea salt aerosol over areas of ocean remote from the continents (Stefels & van Boekel, 1993;Gondwe et al, 2003), it affects cloud formation and has a hypothetical role in climate regulation (Charlson et al, 1987;Ayers & Cainey, 2007;Quinn & Bates, 2011). However, recent research has focused on DMSP, which is often a significant component of the carbon quota of phytoplankton cells and may play a significant role in prokaryote production and the microbial loop (Kiene et al, 2000). Major determinants of DMSP and DMS concentrations in the ocean are phytoplankton biomass and community composition (Malin et al, 1998).…”

Section: Dimethylsulfoniopropionate (Dmsp) and Dimethysulfide (Dms)mentioning

confidence: 99%

“…Simó et al (2002) found that DMSP synthesis was proportional to photosynthesis in the North Atlantic and that phytoplankton invested 7% of net primary production into DMSP production. Compiling data from a range of in situ experiments and culture work, Kiene et al (2000) concluded that DMSP forms <1 to 39% of the cell carbon quota of phytoplankton, with most values lying in the range of 1-5%. Dissolved DMSP concentrations in surface waters were in the range 0.1-25 nM, with a turnover rate of 0.3-129 nM day -1 (Kiene et al, 2000).…”

Section: Dimethylsulfoniopropionate (Dmsp) and Dimethysulfide (Dms)mentioning

confidence: 99%

“…Compiling data from a range of in situ experiments and culture work, Kiene et al (2000) concluded that DMSP forms <1 to 39% of the cell carbon quota of phytoplankton, with most values lying in the range of 1-5%. Dissolved DMSP concentrations in surface waters were in the range 0.1-25 nM, with a turnover rate of 0.3-129 nM day -1 (Kiene et al, 2000). DMS production was associated with high in situ phytoplankton productivity during the Southern Ocean Iron enrichment Experiment (SOFeX).…”

Section: Dimethylsulfoniopropionate (Dmsp) and Dimethysulfide (Dms)mentioning

confidence: 99%

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Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean

Thornton

2014

European Journal of Phycology

356

311

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The partitioning of organic matter (OM) between dissolved and particulate phases is an important factor in determining the fate of organic carbon in the ocean. Dissolved organic matter (DOM) release by phytoplankton is a ubiquitous process, resulting in 2-50% of the carbon fixed by photosynthesis leaving the cell. This loss can be divided into two components: passive leakage by diffusion across the cell membrane and the active exudation of DOM into the surrounding environment. At present there is no method to distinguish whether DOM is released via leakage or exudation. Most explanations for exudation remain hypothetical; as while DOM release has been measured extensively, there has been relatively little work to determine why DOM is released. Further research is needed to determine the composition of the DOM released by phytoplankton and to link composition to phytoplankton physiological status and environmental conditions. For example, the causes and physiology of phytoplankton cell death are poorly understood, though cell death increases membrane permeability and presumably DOM release. Recent work has shown that phytoplankton interactions with bacteria are important in determining both the amount and composition of the DOM released. In response to increasing CO 2 in the atmosphere, climate change is creating increasingly stressful conditions for phytoplankton in the surface ocean, including relatively warm water, low pH, low nutrient supply and high light. As ocean physics and chemistry change, it is hypothesized that a greater proportion of primary production will be released directly by phytoplankton into the water as DOM. Changes in the partitioning of primary production between the dissolved and particulate phases will have bottom-up effects on ecosystem structure and function. There is a need for research to determine how these changes affect the fate of organic matter in the ocean, particularly the efficiency of the biological carbon pump.

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“…Both DMSP and DMS are S-and C-containing organic compounds that are biosynthesized by phytoplankton (DMSP) and assimilated and degraded by bacterioplankton (Kiene et al, 2000). DMSP is transformed to DMS, a volatile compound influencing global temperature but with a cooling effect, through its effects on cloud cover (Andreae, 1990).…”

Section: Introductionmentioning

confidence: 99%

Methane production induced by dimethylsulfide in surface water of an upwelling ecosystem

Florez-Leiva¹,

Damm

Farı́as

2013

Progress in Oceanography

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a b s t r a c tCoastal upwelling ecosystems are areas of high productivity and strong outgassing, where most gases, such as N 2 O and CH 4 , are produced in subsurface waters by anaerobic metabolisms. We describe seasonal CH 4 variation as well as potential mechanisms producing CH 4 in surface waters of the central Chile upwelling ecosystem (36°S). Surface waters were always supersaturated in CH 4 (from 125% up to 550%), showing a clear seasonal signal triggered by wind driven upwelling processes (austral springsummer period), that matched with the periods of high chlorophyll-a and dimethylsulfoniopropionate (DMSP) levels. Methane cycling experiments, with/without the addition of dimethylsulfide (including 13 C-DMS) and acetylene (a nonspecific inhibitor of CH 4 oxidation) along with monthly measurements of CH 4 , DMSP and other oceanographic variables revealed that DMS can be a CH 4 precursor. Net CH 4 cycling rates (control) fluctuated between À0.64 and 1.44 nmol L À1 d À1 . After the addition of acetylene, CH 4 cycling rates almost duplicated relative to the control, suggesting a strong methanotrophic activity. With a spike of DMS, the net CH 4 cycling rate significantly increased relative to the acetylene and control treatment. Additionally, the d 13 C values of CH 4 at the end of the incubations (after addition of 13 C enriched-DMS) were changed, reaching À32‰ PDB compared to natural values between À44‰ and À46‰ PDB. These findings indicate that, in spite of the strong CH 4 consumption by methanotrophs, this upwelling area is an important source of CH 4 to the atmosphere. The effluxes are derived partially from in situ surface production and seem to be related to DMSP/DMS metabolism.

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New and important roles for DMSP in marine microbial communities

Cited by 523 publications

References 57 publications

Transcriptomic analysis of a marine bacterial community enriched with dimethylsulfoniopropionate

Transcriptomic analysis of a marine bacterial community enriched with dimethylsulfoniopropionate

Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean

Methane production induced by dimethylsulfide in surface water of an upwelling ecosystem

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