Effects of Protoceratium reticulatum yessotoxin on feeding rates of Acartia hudsonica: A bioassay using artificial particles coated with purified toxin

Makino, Wataru; Ito, Keisuke; Oshima, Yasukatsu; Urabe, Jotaro

doi:10.1016/j.hal.2008.01.002

Cited by 8 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Copepod grazing can be reduced where grazers are exposed to toxins [21-23]. If there are alternative sources of food, copepods actively avoided toxic food [24]. Copepods display differential feeding activity, when encountering distinct levels of toxins [25].…”

Section: Introductionmentioning

confidence: 99%

Transcriptome, Biochemical and Growth Responses of the Marine Phytoplankter Phaeodactylum Tricornutum Bohlin (Bacillariophyta) to Copepod Grazer Presence

Ismar

2018

Cell Physiol Biochem

View full text Add to dashboard Cite

Background/Aims: As a model organism for a pleiomorphic marine planktonic primary producer, Phaeodactylum tricornutum has been studied on a molecular level under diverse cultural conditions. But little is known about its morphological, nutritional or transcriptomic responses under grazing stress. Methods: To assess microalgal molecular and cellular responses to grazer presence, we conducted transcriptome profiling in combination with growth rate, biovolume, fatty acid content, carbon and nitrogen content measurements in the model diatom Phaeodactylum tricornutum. RNA-sequencing was used to evaluate the transcriptomic response to grazing stress for P. tricornutum strain CCAP 1055/1. Results: Among the differentially expressed genes, we found down-regulation of genes involved in pathogen resistance, and in fatty acid biosynthesis pathways, while mitosis-involved genes were up-regulated. Experimentally testing morphological and biochemical responses in five strains of the species, we detected strain-specific significant effects of simulated grazing pressure in altered growth rates, biovolume and nutritional composition. Conclusion: Our research reveals the associated molecular and cellular responses to grazing effects in P. tricornutum and extends the understanding of co-evolutionary roles in regulating grazing defence between P. tricornutum and its grazer.

show abstract

Section: Introductionmentioning

confidence: 99%

Transcriptome, Biochemical and Growth Responses of the Marine Phytoplankter Phaeodactylum Tricornutum Bohlin (Bacillariophyta) to Copepod Grazer Presence

Ismar

2018

Cell Physiol Biochem

View full text Add to dashboard Cite

show abstract

“…Consequently, YTX should be considered a potential risk for human health with a lethal dose (LD50) between 80 and 750 mg/kg (Paz et al, 2008). Besides the possible toxic effects of YTX, it has been suggested that YTX may act as a defense against grazers as feeding rates by copepods were significantly reduced in the presence of YTX (Makino et al, 2008). Yessotoxin has been found in bivalves and phytoplankton samples in many places around the world (Paz et al, 2008), with records from Norway (Ramstad et al, 2001;Miles et al, 2004) and the Russian White Sea (Vershinin et al, 2006), indicating a subarctic and arctic occurrence.…”

Section: Introductionmentioning

confidence: 99%

Growth and bioactive secondary metabolites of arctic Protoceratium reticulatum (Dinophyceae)

et al. 2016

View full text Add to dashboard Cite

“…Copepods can also decrease their feeding activity if exposed to toxins (Breier and Buskey, 2007;Waggett et al, 2008). If alternative food is present, toxic prey can be avoided in favor of non-toxic food particles (Makino et al, 2008). Copepods even exhibit differential feeding activity if Alexandrium minutum diets of the same isolate with different toxin levels are offered (Selander et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Growth phase of the diatom Skeletonema marinoi influences the metabolic profile of the cells and the selective feeding of the copepod Calanus spp.

Barofsky

Simonelli

Vidoudez

et al. 2009

Journal of Plankton Research

View full text Add to dashboard Cite

Copepods dominate the biomass of marine zooplankton and through their prey selection they act as top-down regulators of planktonic communities. We investigated feeding preference of copepods in the presence of the diatom Skeletonema marinoi at different time points throughout the development of a bloom and a culture. Quantitative PCR gut content assessment revealed that the food uptake of the copepod Calanus spp. on mixed diets and on artificially induced mesocosm blooms was selective. Uptake of S. marinoi was highest during the post-bloom phase in the mesocosms even if the abundance of this alga was already low. In laboratory assays, copepods showed a greater preference for S. marinoi in the late stationary phase than for cultures of the same strain under exponentially growing culture conditions. The copepods thus discriminate between different growth phases of a single algal species in both laboratory and field settings. In parallel, we monitored cellular metabolites of the diatom using a metabolomic approach. Complex changes in the metabolic profile occur during development of a culture. Since no obvious effect of nutrient quality and cell size was involved, we suggest that changes in (info)chemicals within or surrounding S. marinoi regulate selective feeding by zooplankton.

show abstract

Effects of Protoceratium reticulatum yessotoxin on feeding rates of Acartia hudsonica: A bioassay using artificial particles coated with purified toxin

Cited by 8 publications

References 34 publications

Transcriptome, Biochemical and Growth Responses of the Marine Phytoplankter Phaeodactylum Tricornutum Bohlin (Bacillariophyta) to Copepod Grazer Presence

Transcriptome, Biochemical and Growth Responses of the Marine Phytoplankter Phaeodactylum Tricornutum Bohlin (Bacillariophyta) to Copepod Grazer Presence

Growth and bioactive secondary metabolites of arctic Protoceratium reticulatum (Dinophyceae)

Growth phase of the diatom Skeletonema marinoi influences the metabolic profile of the cells and the selective feeding of the copepod Calanus spp.

Contact Info

Product

Resources

About