Effects of copper and butyltin compounds on the growth, photosynthetic activity and toxin production of two HAB dinoflagellates: The planktonic Alexandrium catenella and the benthic Ostreopsis cf. ovata

Couet, Douglas; Pringault, Olivier; Bancon-Montigny, Chrystelle; Briant, Nicolas; Poulichet, Françoise Elbaz; Delpoux, Sophie; Yahia, Ons Kéfi–Daly; Gharbia, Héla Ben; M’Rabet, Charaf; Hervé, Fabienne; Rovillon, Georges Augustin; Amzil, Zouher; Laabir, Mohamed

doi:10.1016/j.aquatox.2018.01.005

Cited by 24 publications

(19 citation statements)

References 122 publications

(83 reference statements)

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“…Growth: At present, acid rain and copper pollution are widely receiving attentions for their harmful effects to marine ecosystem (Gao et al 2016, Couet et al 2018. S. horneri distributes mainly on rocky shores in the intertidal zone (Fig.…”

Section: Discussionmentioning

confidence: 99%

Low pH in simulated acid rain promotes the toxicity of copper on the physiological performance in Sargassum horneri

Zhong¹,

Qin²,

Wang³

et al. 2020

Photosynt.

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In order to investigate the interactive effects of simulated acid rain and copper (Cu) on macroalgae, Sargassum horneri was cultured under pH of 8.2, 5.6, 4.5 and Cu concentrations of 0, 25, 100 μg L-1. Under the medium concentration of Cu, moderate pH mitigated the toxicity of Cu on S. horneri, while the low pH and high Cu concentration reduced the contents of chlorophyll (Chl) a and carotenoids. Furthermore, pH had no interaction with Cu on maximal Chl fluorescence or electron transport efficiency, while effective PSII quantum yield, maximum electron transport rate, and saturating irradiance were obviously affected by pH and Cu, and the interactive effects were significant. Additionally, with the increasing Cu concentration and decreasing pH, nonphotochemical quenching and regulated energy dissipation dropped sharply, while nonregulated energy dissipation increased. Therefore, the high concentration of Cu and low pH had synergistic effects on the photosynthetic performance and growth of S. horneri.

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Section: Discussionmentioning

confidence: 99%

Low pH in simulated acid rain promotes the toxicity of copper on the physiological performance in Sargassum horneri

Zhong¹,

Qin²,

Wang³

et al. 2020

Photosynt.

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“…Heavy metals are usually regarded as a main anthropogenic contaminant in coastal and marine environments all over the world [55], which can also affect the growth and toxin production of dinoflagellate [41,42,43]. However, not all metal elements could promote the production of microalgae toxins.…”

Section: Discussionmentioning

confidence: 99%

“…As the most important source of organotin compounds in the marine environment, TBT is doomed to be highly persistent due to its reversible adsorption to sediments [50]. Owing to the wide use of Cu in industrial activities and other fields (as an important ingredient in many algaecides and herbicides), Cu accumulation in marine sediments has also been becoming a great concern in marine ecosystems [43]. Here, we found that OA production in P. lima was significantly increased under higher concentrations of Cu 2+ (1575 nM and 5039 nM), but decreased under higher concentrations of TBT (2.7 nM and 8.5 nM).…”

Section: Discussionmentioning

confidence: 99%

“…Secondly, P. lima was observed to produce OA production in the presence of Artemia salina , a suitable model species to assess the toxicity of marine benthic dinoflagellates [39]. Finally, given that algal toxin production is governed by multiple intricate physiological and ecological factors, such as the imbalance of nutrient ratio, the availability of nutrients, environmental pollutants, and grazing pressure [40,41,42,43,44,45], the relationship between the expression of three ABC genes and OA production under different conditions (nutrient limitations, different sources of nutrients, heavy metal stress, grazing pressure) was investigated.…”

Section: Introductionmentioning

confidence: 99%

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ABC Transporters in Prorocentrum lima and Their Expression Under Different Environmental Conditions Including Okadaic Acid Production

Xiao

Zheng

et al. 2019

Marine Drugs

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Prorocentrum lima is a typical benthic toxic dinoflagellate, which can produce phycotoxins such as okadaic acid (OA). In this study, we identified three ABC transporter genes (ABCB1, ABCC1 and ABCG2) and characterized their expression patterns, as well as OA production under different environmental conditions in P. lima. We found that the three ABC transporters all showed high identity with related ABC proteins from other species, and contained classical features of ABC transport proteins. Among them, ABCG2 was a half size transporter. The three ABC transporter genes displayed various expression profiles under different conditions. The high concentration of Cu2+ could up-regulate ABCB1, ABCC1 and ABCG2 transcripts in P. lima, suggesting the potential defensive role of ABC transporters against metal ions in surrounding waters. Cu2+, in some concentration, could induce OA production; meanwhile, tributyltin inhibited OA accumulation. The grazer Artemia salina could induce OA production, and P. lima displayed some toxicity to the grazer, indicating the possibility of OA as an anti-grazing chemical. Collectively, our results revealed intriguing data about OA production and the expression patterns of three ABC transporter genes. However, we could not find any significant correlation between OA production and expression pattern of the three ABC transporters in P. lima. Our results might provide new molecular insights on the defensive responses of P. lima to the surrounding environment.

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“…ovata (EC 50 = 0.16 nM and 0.03 nM of Cu 2+ for A. catenella and O. cf. ovata respectively) (Couet et al, 2018).…”

Section: Biological Significance Of the Predicted Secretomementioning

confidence: 97%

In silicoprediction of the secretome from the invasive neurotoxic marine dinoflagellateAlexandrium catenella

Chetouhi

Laabir

Masseret

et al. 2019

Environ Microbiol Rep

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Summary Alexandrium catenella, a marine dinoflagellate responsible for harmful algal blooms (HABs), proliferates with greater frequency, distribution and intensity, in disturbed marine coastal ecosystems. The proteins secreted into seawater may play a crucial role in maintaining this dinoflagellate in these ecosystems, but this possibility has never been investigated before. In this study, the A. catenella secretome was predicted from its transcriptome by combining several bioinformatics tools. Our results predict a secretome of 2 779 proteins, among which 79% contain less than 500 amino acids, suggesting that most secreted proteins are short in length. The predicted secretome includes 963 proteins (35%) with Pfam domains: 773 proteins with one Pfam domain and 190 proteins with two or more Pfam domains. Their functional annotation showed that they are mainly involved in (i) proteolysis, (ii) stress responses and (iii) primary metabolism. In addition, 47% of the secreted proteins appear to be enzymes, primarily peptidases, known to be biologically active in the extracellular medium during stress responses. Finally, this study provides a wealth of candidates of proteins secreted by A. catenella, which may interact with the marine environment and help this dinoflagellate develop in various environmental conditions.

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Effects of copper and butyltin compounds on the growth, photosynthetic activity and toxin production of two HAB dinoflagellates: The planktonic Alexandrium catenella and the benthic Ostreopsis cf. ovata

Cited by 24 publications

References 122 publications

Low pH in simulated acid rain promotes the toxicity of copper on the physiological performance in Sargassum horneri

Low pH in simulated acid rain promotes the toxicity of copper on the physiological performance in Sargassum horneri

ABC Transporters in Prorocentrum lima and Their Expression Under Different Environmental Conditions Including Okadaic Acid Production

In silicoprediction of the secretome from the invasive neurotoxic marine dinoflagellateAlexandrium catenella

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