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Lindholm, Tore; Öhman, Petra; Kurki-Helasmo, Katriina; Kincaid, Brendan J.; Meriluoto, Jussi

doi:10.1023/a:1003667728458

Cited by 77 publications

(10 citation statements)

References 16 publications

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“…The succession among phytoplankton species during harmful algal bloom (HAB) events is complex, and the mechanisms of bloom-species selection and how some species dominate over others is not clear [1][2][3][4]. In allelopathic interactions, specific chemical compounds (allelochemicals) produced by one species can induce damage or benefit another species [5].…”

Section: Introductionmentioning

confidence: 99%

Cell Death and Metabolic Stress in Gymnodinium catenatum Induced by Allelopathy

Fernández-Herrera

Band‐Schmidt

Zenteno‐Savín

et al. 2021

Toxins

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Allelopathy between phytoplankton species can promote cellular stress and programmed cell death (PCD). The raphidophyte Chattonella marina var. marina, and the dinoflagellates Margalefidinium polykrikoides and Gymnodinium impudicum have allelopathic effects on Gymnodinium catenatum; however, the physiological mechanisms are unknown. We evaluated whether the allelopathic effect promotes cellular stress and activates PCD in G. catenatum. Cultures of G. catenatum were exposed to cell-free media of C. marina var. marina, M. polykrikoides and G. impudicum. The mortality, superoxide radical (O2●−) production, thiobarbituric acid reactive substances (TBARS) levels, superoxide dismutase (SOD) activity, protein content, and caspase-3 activity were quantified. Mortality (between 57 and 79%) was registered in G. catenatum after exposure to cell-free media of the three species. The maximal O2●− production occurred with C. marina var. marina cell-free media. The highest TBARS levels and SOD activity in G. catenatum were recorded with cell-free media from G. impudicum. The highest protein content was recorded with cell-free media from M. polykrikoides. All cell-free media caused an increase in the activity of caspase-3. These results indicate that the allelopathic effect in G. catenatum promotes cell stress and caspase-3 activation, as a signal for the induction of programmed cell death.

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Section: Introductionmentioning

confidence: 99%

Cell Death and Metabolic Stress in Gymnodinium catenatum Induced by Allelopathy

Fernández-Herrera

Band‐Schmidt

Zenteno‐Savín

et al. 2021

Toxins

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“…Molecular signatures of cyanobacterial harmful algal blooms (cHABs) have been identified on all seven continents, and these blooms have been occurring with increased frequency and duration in recent years (2)(3)(4). The accumulation of bloom biomass has been associated with fish, avian, and mammal intoxication (5,6); the formation of hypoxic zones (7); the production of taste and odor compounds (8,9); and even human liver failure in extreme cases (10).…”

mentioning

confidence: 99%

Metatranscriptomic Evidence for Co-Occurring Top-Down and Bottom-Up Controls on Toxic Cyanobacterial Communities

Steffen

Belisle

Watson

et al. 2015

Appl Environ Microbiol

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Little is known about the molecular and physiological function of co-occurring microbes within freshwater cyanobacterial harmful algal blooms (cHABs). To address this, community metatranscriptomes collected from the western basin of Lake Erie during August 2012 were examined. Using sequence data, we tested the hypothesis that the activity of the microbial community members is independent of community structure. Predicted metabolic and physiological functional profiles from spatially distinct metatranscriptomes were determined to be >90% similar between sites. Targeted analysis of Microcystis aeruginosa, the historical causative agent of cyanobacterial harmful algal blooms over the past ϳ20 years, as well as analysis of Planktothrix agardhii and Anabaena cylindrica, revealed ongoing transcription of genes involved in microcystin toxin synthesis as well as the acquisition of both nitrogen and phosphorus, nutrients often implicated as independent bottom-up drivers of eutrophication in aquatic systems. Transcription of genes involved in carbon dioxide (CO 2 ) concentration and metabolism also provided support for the alternate hypothesis that high-pH conditions and dense algal biomass result in CO 2 -limiting conditions that further favor cyanobacterial dominance. Additionally, the presence of Microcystis-specific cyanophage sequences provided preliminary evidence of possible top-down virus-mediated control of cHAB populations. Overall, these data provide insight into the complex series of constraints associated with Microcystis blooms that dominate the western basin of Lake Erie during summer months, demonstrating that multiple environmental factors work to shape the microbial community. F reshwater ecosystems are considered among the most endangered in the biosphere (1). One threat to fresh waters around the world is the now nearly annual occurrence of blooms of toxic cyanobacteria. Molecular signatures of cyanobacterial harmful algal blooms (cHABs) have been identified on all seven continents, and these blooms have been occurring with increased frequency and duration in recent years (2-4). The accumulation of bloom biomass has been associated with fish, avian, and mammal intoxication (5, 6); the formation of hypoxic zones (7); the production of taste and odor compounds (8, 9); and even human liver failure in extreme cases (10).The Laurentian Great Lakes are an important freshwater resource, holding ϳ18% of the world's potable water and ϳ84% of the surface waters in North America (11). cHABs have had a persistent presence in Lake Erie and other Laurentian Great Lakes for several decades (3, 12, 13). Nuisance biomass and toxin production associated with cHABs in the Great Lakes have had a detrimental effect not only on ecosystem health but also on the economic health of the surrounding communities; indeed, in August 2014, a bloom event led to the shutdown of the water supply for some ϳ500,000 residents in the region of the city of Toledo, OH (14). To date, research efforts have broadly identified nutrient inputs an...

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“…The fish used as a model in this study to explore the ichthyotoxic effects of P. parvum was European plaice (Pleuronectes platessa) with an average mass of 258 ± 44 g (mean ± SD). Since the blooms of P. parvum affect all of the fish species [5,6], the selection of the model species was based on experimental criteria, as opposed to likelyhood of the species being affected in nature. The natural behavior of the plaice is to staying buried during daytime and being active at night.…”

Section: Experimental Fishmentioning

confidence: 99%

“…The toxic alga Prymnesium parvum Carter has during the last century caused massive fish kills in both aquaculture and wild populations [1][2][3][4][5]. When a bloom of P. parvum occurs, all of the fish species located in the bloom area are affected [5,6]. Therefore, blooms of P. parvum will have ecological effects on fish stocks, as well as being a threat to aquaculture [7].…”

Section: Introductionmentioning

confidence: 99%

Respiratory Physiology of European Plaice (Pleuronectes platessa) Exposed to Prymnesium parvum

Bergsson

Andersen

Svendsen

et al. 2019

Fishes

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During the last century, the blooms of the toxic haptophyte Prymnesium parvum have been responsible for massive fish kills in both aquaculture and wild populations. Despite decades of research, the ichthyotoxic properties of P. parvum, and how this alga affects fish, is still debated. Using a novel device to measure the respirometry, ventilation volume, ventilation frequency, oxygen extraction, and oxygen consumption of undisturbed European plaice (Pleuronectes platessa) were acquired during exposure to two algal species as well as hypoxia. Fourteen fish (258 ± 44 g) were initially exposed to severe hypoxia and left to recover for at least 48 h. Half of these fish were then exposed to known harmful concentrations of P. parvum (median ± standard deviation (SD); 2.6 × 10 5 ± 0.6 × 10 5 cells mL −1 ), while the remaining half were exposed to the non-toxic alga Rhodomonas salina (median ± SD; 3.2 × 10 5 ± 0.7 × 10 5 cells mL −1 ). During exposure to severe hypoxia, all of the fish were able to maintain oxygen consumption by increasing the ventilation volume. The results from fish that were exposed to P. parvum showed a significant decrease in oxygen extraction (median ± SD; 52.6 ± 6.9 percentage points) from pre-exposure to the end of the experiment, as opposed to fish exposed to R. salina, which were unaffected. These results indicate that suffocation affects the European plaice when exposed to P. parvum. The observed severe decrease in oxygen extraction can be ascribed to either damage of the gill epithelia or increased mucus secretion on the gills, as both would limit the transfer of oxygen, and both have been observed.

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Cited by 77 publications

References 16 publications

Cell Death and Metabolic Stress in Gymnodinium catenatum Induced by Allelopathy

Cell Death and Metabolic Stress in Gymnodinium catenatum Induced by Allelopathy

Metatranscriptomic Evidence for Co-Occurring Top-Down and Bottom-Up Controls on Toxic Cyanobacterial Communities

Respiratory Physiology of European Plaice (Pleuronectes platessa) Exposed to Prymnesium parvum

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