Light induces peridinin and docosahexaenoic acid accumulation in the dinoflagellate Durusdinium glynnii

Oliveira, Carlos Yure B.; Abreu, Jéssika Lima de; Santos, Elizabeth Pereira dos; Matos, Ângelo Paggi; Tribuzi, Giustino; Oliveira, Cícero Diogo Lins de; Veras, Bruno Oliveira de; Bezerra, Railson S.; Müller, Marius; Gálvez, Alfredo Olivera

doi:10.1007/s00253-022-12131-6

Cited by 12 publications

(3 citation statements)

References 82 publications

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“…In the present study, both the POC and PIC production rates of P. carterae were positively correlated with the available energy under unsaturated irradiance but became negatively correlated and decreased when the irradiance exceeded the metabolic capacity. This trend was consistent with previous findings [ 37 ]. When irradiance is higher than saturation, the negative effects of a. high irradiance cause damage to Photosystem I (PSI) and Photosystem II (PSII) and PSII is more sensitive to environmental changes [ 38 ].…”

Section: Discussionsupporting

confidence: 94%

Ocean Acidification Affects the Response of the Coastal Coccolithophore Pleurochrysis carterae to Irradiance

Wu,

Guo,

Duan

et al. 2023

Biology

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The ecologically important marine phytoplankton group coccolithophores have a global distribution. The impacts of ocean acidification on the cosmopolitan species Emiliania huxleyi have received much attention and have been intensively studied. However, the species-specific responses of coccolithophores and how these responses will be regulated by other environmental drivers are still largely unknown. To examine the interactive effects of irradiance and ocean acidification on the physiology of the coastal coccolithophore species Pleurochrysis carterae, we carried out a semi-continuous incubation experiment under a range of irradiances (50, 200, 500, 800 μmol photons m−2 s−1) at two CO2 concentration conditions of 400 and 800 ppm. The results suggest that the saturation irradiance for the growth rate was higher at an elevated CO2 concentration. Ocean acidification weakened the particulate organic carbon (POC) production of Pleurochrysis carterae and the inhibition rate was decreased with increasing irradiance, indicating that ocean acidification may affect the tolerating capacity of photosynthesis to higher irradiance. Our results further provide new insight into the species-specific responses of coccolithophores to the projected ocean acidification under different irradiance scenarios in the changing marine environment.

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Section: Discussionsupporting

confidence: 94%

Ocean Acidification Affects the Response of the Coastal Coccolithophore Pleurochrysis carterae to Irradiance

Wu,

Guo,

Duan

et al. 2023

Biology

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“…Thus, in the past decades, several studies have been published on the extraction and application of antioxidants obtained from natural sources in food and related products (Sabeena Farvin et al, 2012). The marine environment is a relatively less explored source of natural bioactive compounds with antioxidant properties including phenolic compounds, terpenoids, sulfated polysaccharides, and pigments to replace synthetic compounds (Tziveleka et al, 2021;Oliveira et al, 2022). These compounds can be found in e.g., seaweeds.…”

Section: Introductionmentioning

confidence: 99%

Extraction of bioactives from brown seaweed using sub and supercritical fluids: Influence of the extract on the storage stability of fish oil enrich mayonnaise

Hermund

Liu

Jacobsen

et al. 2023

Front. Food. Sci. Technol.

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This study aimed at extracting lipophilic and hydrophilic compounds from Nordic brown seaweed Fucus vesiculosus and to evaluate the extract’s ability to maintain the physical and oxidative stability of fish oil-enriched mayonnaise (80% fat, 1:4 fish oil: rapeseed oil) during storage (dark, up to 28 days). Three different types of extracts were obtained, one using supercritical carbon dioxide (lipophilic extract) and two using subcritical water extraction (hydrophilic extracts)—one on dry seaweed (Subcritical water extract (SCWE) and one on the residue from supercritical carbon dioxide extraction after extracting the lipophilic compounds (Subcritical water extract (SCWER). The extracts were characterized with respect to their antioxidant composition and in vitro antioxidant properties. Moreover, the extracts were added in concentrations of 2 g/kg mayonnaise, both individually or in combination to study synergistic effects between antioxidants with different polarity and locations in the mayonnaise system. Results showed that both types of extractsdelayed the oxidation of lipids; The hydrophilic extracts (SCWE and SCWER) were able toretard the formation of hydroperoxides, and subsequent formation of secondary oxidation products. However, no synergetic effect was found for the hydrophilic and hydrophobic extracts when they were applied in different phases of the mayonnaise. The metal chelating ability is suggested to be responsible for the observed better performance of the hydrophilic extracts. However, further studies are required to understand which specific components in the extract have contributed to metal chelating ability. In conclusion, the findings of the present study suggest hydrophilic and hydrophobic compounds from the Nordic seaweed F. vesiculosus can retard lipid oxidation in mayonnaise.

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“…Photosystem acclimation is typically tied to the modification of photosystem photochemistry (Warner et al, 1996;Ulstrup et al, 2008;Nitschke et al, 2018). The physical reorganization and regulation of photopigments or adjustments to cell morphology can also mitigate stress and promote successful acclimation to different conditions and may be a better representation of long term (months versus days) system regulation (Johnsen et al, 1994;Sawall et al, 2014;Xiang et al, 2015;Oliveira et al, 2022).…”

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confidence: 99%

Cellular plasticity facilitates phenotypic change in a dominant coral’s Symbiodiniaceae assemblage

Anthony,

Lock,

Taylor

et al. 2023

Front. Ecol. Evol.

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Coral-associated dinoflagellates (Symbiodiniaceae) are photosynthetic endosymbionts that influence coral acclimation, as indicated by photo-endosymbiotic phenotypic variance across different environmental conditions. Symbiont shuffling (shifts in endosymbiont community composition), changes in endosymbiont cell density, and cellular plasticity have all been proposed as acclimation mechanisms. However, few studies have been able to partition which of the three strategies were responsible for observed phenotypic variance. Using a combination of metabarcoding and flow cytometry, we simultaneously characterized Acropora pulchra-associated Symbiodiniaceae assemblages at the community, population, and individual level under natural environmental conditions to deduce whether seasonal phenotypic change and site-related phenotypic variation of Symbiodiniaceae assemblages is a product of symbiont shuffling or cellular plasticity. Symbiodiniaceae assemblages displayed season-specific phenotypic variance, while Symbiodiniaceae community composition was geographically structured and cell density showed limited data structure. Based on these patterns, we reveal that cellular plasticity of Symbiodiniaceae was the source of a phenotypic variation, thus indicating that cellular plasticity is a mechanism for acclimation to mild environmental change.

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Light induces peridinin and docosahexaenoic acid accumulation in the dinoflagellate Durusdinium glynnii

Cited by 12 publications

References 82 publications

Ocean Acidification Affects the Response of the Coastal Coccolithophore Pleurochrysis carterae to Irradiance

Ocean Acidification Affects the Response of the Coastal Coccolithophore Pleurochrysis carterae to Irradiance

Extraction of bioactives from brown seaweed using sub and supercritical fluids: Influence of the extract on the storage stability of fish oil enrich mayonnaise

Cellular plasticity facilitates phenotypic change in a dominant coral’s Symbiodiniaceae assemblage

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