Trade-Off Between Dimethyl Sulfide and Isoprene Emissions from Marine Phytoplankton

Dani, K. G. Srikanta; Loreto, Francesco

doi:10.1016/j.tplants.2017.01.006

Cited by 75 publications

(74 citation statements)

References 99 publications

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“…Therefore we used isoprene measurements as well as different phytoplankton marker pigment measurements to derive in-field production rates for haptophytes, cyanobacteria, Prochlorococcus, chlorophytes, and diatoms in different regions. The results confirm findings from previous laboratory studies that the isoprene production is influenced by light and ocean temperature, due to stress, and by nutrients, due to their effect on changing phytoplankton communities and their abundances (e.g., Dani and Loreto, 2017;Shaw et al, 2010). Moreover, our data lead to the conclusion that isoprene production rates in the field, irrespective of phytoplankton communities and their abundance, are influenced by nutrient levels, which has never been shown before.…”

Section: Discussionsupporting

confidence: 91%

“…Laboratory culture experiments show that stress factors, like temperature and light, also influence the emission rate within one species (Shaw et al, 2003;Exton et al, 2013;Meskhidze et al, 2015). Srikanta Dani et al (2017) showed that in a light regime of 100-600 µmol m −2 s −1 the isoprene emission rate was constantly increasing with higher light levels for the diatom Chaetoceros calcitrans, whereas the diatom Phaeodactylum tricornutum was highest at 200 µmol m −2 s −1 and decreased at higher light levels. Furthermore, health conditions (Shaw et al, 2003), as well as the growth stage of the phytoplankton species (Milne et al, 1995), can also influence the isoprene emission rate.…”

Section: Modeling Chl-a-normalized Isoprene Production Ratesmentioning

confidence: 99%

“…However, this trend cannot easily be generalized to all species, because each species-specific growth requirement is linked differently to the environmental conditions. For example, Srikanta Dani et al (2017) showed that two diatom species, Chaetoceros calcitrans and Phaeodactylum tricornutum, have their maximum isoprene production rate at light levels of 600 and 200 µmol m −2 s −1 , respectively, which decreases at even higher light levels. Furthermore, Meskhidze et al (2015) measured the isoprene production rates of different diatoms at different temperature and light levels on two consecutive days.…”

Section: Introductionmentioning

confidence: 99%

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Marine isoprene production and consumption in the mixed layer of the surface ocean – a field study over two oceanic regions

et al. 2018

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Abstract. Parameterizations of surface ocean isoprene concentrations are numerous, despite the lack of source/sink process understanding. Here we present isoprene and related field measurements in the mixed layer from the Indian Ocean and the eastern Pacific Ocean to investigate the production and consumption rates in two contrasting regions, namely oligotrophic open ocean and the coastal upwelling region. Our data show that the ability of different phytoplankton functional types (PFTs) to produce isoprene seems to be mainly influenced by light, ocean temperature, and salinity.Our field measurements also demonstrate that nutrient availability seems to have a direct influence on the isoprene production. With the help of pigment data, we calculate in-field isoprene production rates for different PFTs under varying biogeochemical and physical conditions. Using these new calculated production rates, we demonstrate that an additional significant and variable loss, besides a known chemical loss and a loss due to air-sea gas exchange, is needed to explain the measured isoprene concentration. We hypothesize that this loss, with a lifetime for isoprene between 10 and 100 days depending on the ocean region, is potentially due to degradation or consumption by bacteria.

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Section: Discussionsupporting

confidence: 91%

Section: Modeling Chl-a-normalized Isoprene Production Ratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Marine isoprene production and consumption in the mixed layer of the surface ocean – a field study over two oceanic regions

et al. 2018

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“…Previous analyses of DMSP have focused on marine phytoplankton and plants where it is found in higher concentrations. This has led to a hypothesis that DMSP formation competes with the emission of isoprene during stress (Dani and Loreto, 2017). If replicated in vascular plants, this would have major implications for our understanding of the regulation VOC emissions during stress.…”

Section: Introductionmentioning

confidence: 99%

Moderate Drought Stress Induces Increased Foliar Dimethylsulphoniopropionate (DMSP) Concentration and Isoprene Emission in Two Contrasting Ecotypes of Arundo donax

et al. 2017

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The function of dimethylsulphoniopropionate (DMSP) in plants is unclear. It has been proposed as an antioxidant, osmolyte and overflow for excess energy under stress conditions. The formation of DMSP is part of the methionine (MET) pathway that is involved in plant stress responses. We used a new analytical approach to accurately quantify the changes in DMSP concentration that occurred in two ecotypes of the biomass crop Arundo donax subject to moderate drought stress under field conditions. The ecotypes of A. donax were from a hot semi-arid habitat in Morocco and a warm-humid environment in Central Italy. The Moroccan ecotype showed more pronounced reductions in photosynthesis, stomatal conductance and photochemical electron transport than the Italian ecotype. An increase in isoprene emission occurred in both ecotypes alongside enhanced foliar concentrations of DMSP, indicative of a protective function of these two metabolites in the amelioration of the deleterious effects of excess energy and oxidative stress. This is consistent with the modification of carbon within the methyl-erythritol and MET pathways responsible for increased synthesis of isoprene and DMSP under moderate drought. The results of this study indicate that DMSP is an important adaptive component of the stress response regulated via the MET pathway in A. donax. DMSP is likely a multifunctional molecule playing a number of roles in the response of A. donax to reduced water availability.

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“…The principal cause of bleaching is the overproduction of harmful reactive oxygen species (ROS) mostly originating from the photoinhibition of Photosystem II at increased temperature and irradiance (Tchernov et al, 2011), and Symbiodinium can provide clade-specific defences to harmful ROS including enhanced protection against UV radiation (Baker, 2003), higher growth (Little et al, 2004), and increased thermal tolerance (Baker et al, 2004). Since DMSP and DMS readily scavenge ROS (Sunda et al, 2002) and algae are known to use DMS to mitigate ROS-induced metabolic damage under sublethal environmental stresses (Archer et al, 2010;Dani and Loreto, 2017), it is possible that they are part of an antioxidant mechanism that leads to the scavenging of ROS and production of DMSO in symbiotic cnidarians (Gardner et al, 2016;Jones and King, 2015).…”

mentioning

confidence: 99%

Quantification of dimethyl sulfide (DMS) production in the sea anemone <i>Aiptasia</i> sp. to simulate the sea-to-air flux from coral reefs

Franchini

Steinke

2017

Biogeosciences

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Abstract. The production of dimethyl sulfide (DMS) is poorly quantified in tropical reef environments but forms an essential process that couples marine and terrestrial sulfur cycles and affects climate. Here we quantified net aqueous DMS production and the concentration of its cellular precursor dimethylsulfoniopropionate (DMSP) in the sea anemone Aiptasia sp., a model organism to study coral-related processes. Bleached anemones did not show net DMS production whereas symbiotic anemones produced DMS concentrations (mean ± standard error) of 160.7 ± 44.22 nmol g −1 dry weight (DW) after 48 h incubation. Symbiotic and bleached individuals showed DMSP concentrations of 32.7 ± 6.00 and 0.6 ± 0.19 µmol g −1 DW, respectively. We applied these findings to a Monte Carlo simulation to demonstrate that net aqueous DMS production accounts for only 20 % of gross aqueous DMS production. Monte Carlo-based estimations of sea-to-air fluxes of gaseous DMS showed that reefs may release 0.1 to 26.3 µmol DMS m −2 coral surface area (CSA) d −1 into the atmosphere with 40 % probability for rates between 0.5 and 1.5 µmol m −2 CSA d −1 . These predictions were in agreement with directly quantified fluxes in previous studies. Conversion to a flux normalised to sea surface area (SSA) (range 0.1 to 17.4, with the highest probability for 0.3 to 1.0 µmol DMS m −2 SSA d −1 ) suggests that coral reefs emit gaseous DMS at lower rates than the average global oceanic DMS flux of 4.6 µmol m −2 SSA d −1 (19.6 Tg sulfur per year). The large difference between simulated gross and quantified net aqueous DMS production in corals suggests that the current and future potential for its production in tropical reefs is critically governed by DMS consumption processes. Hence, more research is required to assess the sensitivity of DMS-consumption pathways to ongoing environmental change in order to address the impact of predicted degradation of coral reefs on DMS production in tropical coastal ecosystems and its impact on future atmospheric DMS concentrations and climate.

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Trade-Off Between Dimethyl Sulfide and Isoprene Emissions from Marine Phytoplankton

Cited by 75 publications

References 99 publications

Marine isoprene production and consumption in the mixed layer of the surface ocean – a field study over two oceanic regions

Marine isoprene production and consumption in the mixed layer of the surface ocean – a field study over two oceanic regions

Moderate Drought Stress Induces Increased Foliar Dimethylsulphoniopropionate (DMSP) Concentration and Isoprene Emission in Two Contrasting Ecotypes of Arundo donax

Quantification of dimethyl sulfide (DMS) production in the sea anemone <i>Aiptasia</i> sp. to simulate the sea-to-air flux from coral reefs

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Trade-Off Between Dimethyl Sulfide and Isoprene Emissions from Marine Phytoplankton

Cited by 75 publications

References 99 publications

Marine isoprene production and consumption in the mixed layer of the surface ocean – a field study over two oceanic regions

Marine isoprene production and consumption in the mixed layer of the surface ocean – a field study over two oceanic regions

Moderate Drought Stress Induces Increased Foliar Dimethylsulphoniopropionate (DMSP) Concentration and Isoprene Emission in Two Contrasting Ecotypes of Arundo donax

Quantification of dimethyl sulfide (DMS) production in the sea anemone &lt;i&gt;Aiptasia&lt;/i&gt; sp. to simulate the sea-to-air flux from coral reefs

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Quantification of dimethyl sulfide (DMS) production in the sea anemone <i>Aiptasia</i> sp. to simulate the sea-to-air flux from coral reefs