The effect of coral bleaching on the cellular concentration of dimethylsulphoniopropionate in reef corals

Jones, Graham B; Fischer, Esther; Deschaseaux, Elisabeth; Harrison, Peter Lynton

doi:10.1016/j.jembe.2014.06.003

Cited by 26 publications

(34 citation statements)

References 91 publications

(172 reference statements)

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“…Changes in intracellular DMSP concentrations in this coral have been recently reported [31]. In contrast to Nelly Bay no bleaching of corals at Pioneer Bay was observed during our study period.…”

Section: Coral Bleachingsupporting

confidence: 53%

“…These researchers have also observed that when convective rain falls onto exposed coral reefs in the GBR at low tides even higher spikes of DMS a can occur over reefs, possibly caused by intracellular changes in DMSP in corals [31]. It is thought that these natural stress events (low tides, high SSTs, rainfall) cause the coral to utilize intracellular DMSP to cope with the resultant osmotic, solar radiation and temperature stresses [10] [31] [32] [33], and in the process produce enhanced levels of seawater and atmospheric DMS.…”

Section: Discussionmentioning

confidence: 85%

“…It is apparent that natural stress events (e.g. low tides, high SSTs, rainfall) cause the coral to utilize intracellular DMSP to cope with the resultant osmotic, solar radiation and tem-perature stresses [31] [32] [33], and in the process produce enhanced levels of seawater and atmospheric DMS [10] [28] [30] [34].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dimethylsulfide and Coral Bleaching: Links to Solar Radiation, Low Level Cloud and the Regulation of Seawater Temperatures and Climate in the Great Barrier Reef

Jones¹,

Curran²,

Swan³

et al. 2017

AJCC

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Section: Coral Bleachingsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 85%

See 1 more Smart Citation

Dimethylsulfide and Coral Bleaching: Links to Solar Radiation, Low Level Cloud and the Regulation of Seawater Temperatures and Climate in the Great Barrier Reef

Jones¹,

Curran²,

Swan³

et al. 2017

AJCC

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“…In contrast, S. pistillata and P. damicornis showed no regulation of DMSP with changing salinity, suggesting it was less effective in regulating the corals osmotic potential, as indicated by the greater physiological stress. With respect to its role in oxidative stress, increased DMSP production is usually associated with increased ROS levels in Symbiodinium [6,21,29]. The lack of upregulation of DMSP production, irrespective of the increased antioxidant activity measured here, suggests that the corals primary response to hyposaline conditions was to reduce its osmotic potential.…”

Section: Discussionmentioning

confidence: 61%

Dimethylsulfoniopropionate, superoxide dismutase and glutathione as stress response indicators in three corals under short-term hyposalinity stress

et al. 2016

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Corals are among the most active producers of dimethylsulfoniopropionate (DMSP), a key molecule in marine sulfur cycling, yet the specific physiological role of DMSP in corals remains elusive. Here, we examine the oxidative stress response of three coral species (Acropora millepora, Stylophora pistillata and Pocillopora damicornis) and explore the antioxidant role of DMSP and its breakdown products under short-term hyposalinity stress. Symbiont photosynthetic activity declined with hyposalinity exposure in all three reef-building corals. This corresponded with the upregulation of superoxide dismutase and glutathione in the animal host of all three species. For the symbiont component, there were differences in antioxidant regulation, demonstrating differential responses to oxidative stress between the Symbiodinium subclades. Of the three coral species investigated, only A. millepora provided any evidence of the role of DMSP in the oxidative stress response. Our study reveals variability in antioxidant regulation in corals and highlights the influence life-history traits, and the subcladal differences can have on coral physiology. Our data expand on the emerging understanding of the role of DMSP in coral stress regulation and emphasizes the importance of exploring both the host and symbiont responses for defining the threshold of the coral holobiont to hyposalinity stress.

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“…[48] This instant production of DMSP highlights the role of this molecule as a stress response osmolyte [6] and an antioxidant, [28] a conclusion supported by the great variation in DMSP concentrations when corals are recovering from stress events such as mass bleaching. [49] Recent studies have explicitly implicated DMSP and its enzymatic breakdown products in the stress response of corals, as scavengers of cellular reactive oxygen species (ROS) generated upon thermal stress [7,28] or upon direct addition of oxidative stressors such as copper. [50] These recent findings add to others postulating a protective role of DMSP and its degradation products dimethylsulfide (DMS), acrylate, dimethylsulfoxide (DMSO) and methane sulfinic acid (MSNA) as efficient scavengers of hydroxyl radicals and other ROS in free-living algae.…”

Section: Dmsp Concentration In Coral Tissue and De Novo Productionmentioning

confidence: 99%

Dimethylsulfoniopropionate in corals and its interrelations with bacterial assemblages in coral surface mucus

Frade¹,

Schwaninger²,

Glasl³

et al. 2016

Environ. Chem.

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Environmental context. Corals produce copious amounts of dimethylsulfoniopropionate (DMSP), a sulfur compound implicated in climate regulation. We studied DMSP concentrations inside corals and unveiled the linkage between DMSP availability and the abundance of DMSP-degrading bacterial groups inhabiting the corals' surface. Our findings suggest that DMSP mediates the interplay between corals and microbes, highlighting the importance of sulfur compounds for microbial processes in corals and for the resilience of coral reef ecosystems.Abstract. Corals produce copious amounts of dimethylsulfoniopropionate (DMSP), a sulfur compound thought to play a role in structuring coral-associated bacterial communities. We tested the hypothesis that a linkage exists between DMSP availability in coral tissues and the community dynamics of bacteria in coral surface mucus. We determined DMSP concentrations in three coral species (Meandrina meandrites, Porites astreoides and Siderastrea siderea) at two sampling depths (5 and 25 m) and times of day (dawn and noon) at Curaçao, Southern Caribbean. DMSP concentration (4-409 nmol cm À2 coral surface) varied with host species-specific traits such as Symbiodinium cell abundance, but not with depth or time of sampling. Exposure of corals to air caused a doubling of their DMSP concentration. The phylogenetic affiliation of mucus-associated bacteria was examined by clone libraries targeting three main subclades of the bacterial DMSP demethylase gene (dmdA). dmdA gene abundance was determined by quantitative Polymerase Chain Reaction (qPCR) against a reference housekeeping gene (recA). Overall, a higher availability of DMSP corresponded to a lower relative abundance of the dmdA gene, but this pattern was not uniform across all host species or bacterial dmdA subclades, suggesting the existence of distinct DMSP microbial niches or varying dmdA DMSP affinities. This is the first study quantifying dmdA gene abundance in corals and linking related changes in the community dynamics of DMSP-degrading bacteria to DMSP availability. Our study suggests that DMSP mediates the regulation of microbes by the coral host and highlights the significance of sulfur compounds for microbial processes in coral reefs.

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The effect of coral bleaching on the cellular concentration of dimethylsulphoniopropionate in reef corals

Cited by 26 publications

References 91 publications

Dimethylsulfide and Coral Bleaching: Links to Solar Radiation, Low Level Cloud and the Regulation of Seawater Temperatures and Climate in the Great Barrier Reef

Dimethylsulfide and Coral Bleaching: Links to Solar Radiation, Low Level Cloud and the Regulation of Seawater Temperatures and Climate in the Great Barrier Reef

Dimethylsulfoniopropionate, superoxide dismutase and glutathione as stress response indicators in three corals under short-term hyposalinity stress

Dimethylsulfoniopropionate in corals and its interrelations with bacterial assemblages in coral surface mucus

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