Effect of a short-term salinity stress on the growth, biovolume, toxins, osmolytes and metabolite profiles on three strains of the Dinophysis acuminata-complex (Dinophysis cf. sacculus)

Gaillard, Sylvain; Réveillon, Damien; Danthu, Charline; Hervé, Fabienne; Sibat, Manoëlla; Carpentier, Liliane; Hégaret, Hélène; Sechet, Véronique; Heß, Philipp

doi:10.1016/j.hal.2021.102009

Cited by 13 publications

(6 citation statements)

References 78 publications

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“…These differences may not be apparent in situ; however, because all isolates were grown under the same culturing conditions (i.e., Mid‐Atlantic water used for f/2 medium, 15°C, salinity of 25, 100 μmol photons · m −2 · s −1 PAR, and the same ciliate and cryptophyte prey) rather than under region‐specific conditions or prey‐matched species that could modulate growth rate, biovolume, and toxin production (Basti et al, 2015, 2018; Fiorendino et al, 2020; Gaillard et al, 2021; García‐Portela et al, 2018, 2020; Hattenrath‐Lehmann et al, 2010, 2015; Hattenrath‐Lehmann & Gobler, 2015). Measured growth rates were, therefore, neither optimized nor necessarily reflective of species' behavior in situ.…”

Section: Discussionmentioning

confidence: 99%

A survey ofDinophysisspp. and their potential to cause diarrhetic shellfish poisoning in coastal waters of the United States

Ayache¹,

Bill

Brosnahan

et al. 2023

Journal of Phycology

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Multiple species of the genus Dinophysis produce diarrhetic shellfish toxins (okadaic acid and Dinophysis toxins, OA/DTXs analogs) and/or pectenotoxins (PTXs). Only since 2008 have DSP events (illnesses and/or shellfish harvesting closures) become recognized as a threat to human health in the United States. This study characterized 20 strains representing five species of Dinophysis spp. isolated from three US coastal regions that have experienced DSP events: the Northeast/Mid‐Atlantic, the Gulf of Mexico, and the Pacific Northwest. Using a combination of morphometric and DNA‐based evidence, seven Northeast/Mid‐Atlantic isolates and four Pacific Northwest isolates were classified as D. acuminata, a total of four isolates from two coasts were classified as D. norvegica, two isolates from the Pacific Northwest coast were identified as D. fortii, and three isolates from the Gulf of Mexico were identified as D. ovum and D. caudata. Toxin profiles of D. acuminata and D. norvegica varied by their geographical origin within the United States. Cross‐regional comparison of toxin profiles was not possible with the other three species; however, within each region, distinct species‐conserved profiles for isolates of D. fortii, D. ovum, and D. caudata were observed. Historical and recent data from various State and Tribal monitoring programs were compiled and compared, including maximum recorded cell abundances of Dinophysis spp., maximum concentrations of OA/DTXs recorded in commercial shellfish species, and durations of harvesting closures, to provide perspective regarding potential for DSP impacts to regional public health and shellfish industry.

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Section: Discussionmentioning

confidence: 99%

A survey ofDinophysisspp. and their potential to cause diarrhetic shellfish poisoning in coastal waters of the United States

Ayache¹,

Bill

Brosnahan

et al. 2023

Journal of Phycology

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“…With another well-known harmful algae genus, Dinophysis , the response of their metabolome to salinity stress shows strain-dependent modifications under different salinity concentrations. These results, as well as the absence of effects on growth rate and toxins (okadaic acid and pectenotoxin), suggest that Dinophysis sacculus is resistant to salinity variations [ 29 ]. However, more studies are needed to explore dinoflagellate metabolomic responses to nutrient deficiency and metal contamination, as already implemented with transcriptomic and proteomic approaches.…”

Section: Metabolomic Approachesmentioning

confidence: 99%

OMICS Approaches to Assess Dinoflagellate Responses to Chemical Stressors

Roussel,

Mériot,

Jauffrais

et al. 2023

Biology

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Dinoflagellates are important primary producers known to form Harmful Algae Blooms (HABs). In water, nutrient availability, pH, salinity and anthropogenic contamination constitute chemical stressors for them. The emergence of OMICs approaches propelled our understanding of dinoflagellates’ responses to stressors. However, in dinoflagellates, these approaches are still biased, as transcriptomic approaches are largely conducted compared to proteomic and metabolomic approaches. Furthermore, integrated OMICs approaches are just emerging. Here, we report recent contributions of the different OMICs approaches to the investigation of dinoflagellates’ responses to chemical stressors and discuss the current challenges we need to face to push studies further despite the lack of genomic resources available for dinoflagellates.

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“…In culture experiments, PTX2 have been found to affect survival in early larval stages of fish (Rountos et al 2019) and shellfish (Gaillard et al 2021, Pease et al 2022. Furthermore, Li et al (2018) showed in vitro uptake of dissolved DSP toxins by mussels.…”

Section: Introductionmentioning

confidence: 99%

Interaction between temperature and salinity stress on the physiology of Dinophysis spp. and Alexandrium minutum: implications for niche range and blooming patterns

Rial

Sixto

Vázquez

et al. 2023

Aquat. Microb. Ecol.

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Abrupt changes in environmental conditions in estuaries and coastal waters have direct (physiological) and indirect (through changes in water column stability) effects on planktonic microalgae. Understanding and quantifying these effects is important to improve harmful algal bloom predictive models. Dinophysis spp. (D. acuminata, D. acuta and D. caudata) and Alexandrium minutum produce toxins that are transferred through the food web (particulate) by filter feeders and also released in the seawater. These dinoflagellates cause lengthy harvesting bans in European aquaculture sites and affect marine life. The 4 species were exposed to different combinations of temperature (T) and salinity (S) to investigate their short-term response (days) to and their recovery (weeks) from T/S stress. Dinophysis species showed varying capacities to deal with sudden changes in S, from the most resilient D. acuminata, equally affected by T and S stress, to the less tolerant D. acuta, and in particular D. caudata, more affected by S than T stress. The euryhaline A. minutum thrived under all the T/S combinations assayed. Further experiments showed a similar rate of okadaic acid toxin production (pg cell-1 d-1) for the 3 Dinophysis species under different T/S conditions. In contrast, a significant increment of gonyautoxin 4 content per cell was observed in A. minutum with decreasing S without significant effects associated with T. Our results highlight the response to environmental (T/S) stress of 3 species of Dinophysis and A. minutum with specific adaptations to thrive in different sub-habitats of the Galician Rías, an estuarine/coastal upwelling system in NW Spain.

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Effect of a short-term salinity stress on the growth, biovolume, toxins, osmolytes and metabolite profiles on three strains of the Dinophysis acuminata-complex (Dinophysis cf. sacculus)

Cited by 13 publications

References 78 publications

A survey ofDinophysisspp. and their potential to cause diarrhetic shellfish poisoning in coastal waters of the United States

A survey ofDinophysisspp. and their potential to cause diarrhetic shellfish poisoning in coastal waters of the United States

OMICS Approaches to Assess Dinoflagellate Responses to Chemical Stressors

Interaction between temperature and salinity stress on the physiology of Dinophysis spp. and Alexandrium minutum: implications for niche range and blooming patterns

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