+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

Induction of domoic acid production in diatoms-Types of grazers and diatoms are important

Induction of domoic acid production in diatoms-Types of grazers and diatoms are important

Harmful Algae 79: 64-73

ISSN/ISBN: 1568-9883

PMID: 30420018

DOI: 10.1016/j.hal.2018.06.005

Grazers can induce toxin (domoic acid, DA) production in diatoms. The toxic response has been observed in two species of Pseudo-nitzschia and was induced by Calanus copepods. In this study, interactions between diatoms and copepods were further explored using different species of diatoms and copepods. All herbivorous copepods induced toxin production, whereas exposure to carnivorous copepods did not. In line with this, increasing the number of herbivorous copepods resulted in even higher toxin production. The induced response is thus only elicited by copepods that pose a real threat to the responding cells, which supports that the induced toxin production in diatoms evolved as an inducible defense. The cellular toxin content in Pseudo-nitzschia was positively correlated to the concentration of a group of specific polar lipids called copepodamides that are excreted by the copepods. This suggests that copepodamides are the chemical cues responsible for triggering the toxin production. Carnivorous copepods were found to produce less or no copepodamides. Among the diatoms exposed to grazing herbivorous copepods, only two of six species of Pseudo-nitzschia and none of the Nitzschia or Fragilariopsis strains responded by producing DA, indicating that not all Pseudo-nitzschia species/strains are able to produce DA, and that different diatom species might have different strategies for coping with grazing pressure. Growth rate was negatively correlated to cellular domoic acid content indicating an allocation cost associated with toxin production. Long-term grazing experiments showed higher mortality rates of grazers fed toxic diatoms, supporting the hypothesis that DA production is an induced defense mechanism.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 065816592

Download citation: RISBibTeXText

Related references

Pseudonitzschia australis Frenguelli and other toxic diatoms from the west coast of the USA Distribution and domoic acid production. Journal of Shellfish Research 12(1): 143, 1993

Diatoms that produce domoic acid. Canadian Technical Report of Fisheries and Aquatic Sciences 1712: 27, 1989

Effect of pH on growth and domoic acid production by potentially toxic diatoms of the genera Pseudo-nitzschia and Nitzschia. Marine Ecology, Progress Series 273: 1-15, 2004

Production of Aldehydes in Diatoms and Dinoflagellates and the Detrimental Effect on Copepod Grazers. International Journal of Agriculture and Biology 22(4): 763-768, 2019

Comparison of two domoic acid-producing diatoms: A review. Hydrobiologia 269-270: 213-224, 1993

Domoic-acid-producing diatoms Another genus added. Journal of Phycology 36(6): 978-985, 2000

Domoic acid: The synergy of iron, copper, and the toxicity of diatoms. Limnology and Oceanography 50(6): 1908-1917, 2005

Domoic acid-producing diatoms: probable cause of neuroexcitotoxicity in California sea lions. Marine Environmental Research 50(1/5): 485-488, 2000

Toxic diatoms and domoic acid in natural and iron enriched waters of the oceanic Pacific. Proceedings of the National Academy of Sciences of the United States of America 107(48): 20762-20767, 2010

Domoic Acid-Producing Diatoms of the Genus Pseudo-nitzschia H. Peragallo, 1900 (Bacillariophyta) from the North Pacific. Russian Journal of Marine Biology 44(5): 347-354, 2018

Recycling and uptake of Si(OH)4 when protozoan grazers feed on diatoms. Protist 161(2): 288-303, 2010

Toxigenic effects of diatoms on grazers, phytoplankton and other microbes: a review. Ecotoxicology 19(3): 493-511, 2010

Evidence that polyunsaturated aldehydes of diatoms are repellents for pelagic crustacean grazers. Aquatic Ecology 39(3): 271-282, 2005

Heterotrophic dinoflagellates a significant component of microzooplankton biomass and major grazers of diatoms in the sea. Marine Ecology Progress Series 352: 187-197, 2008

Long-term changes in the seasonality of selected diatoms related to grazers and environmental conditions. Journal of Sea Research (den Burg. Print) 67(1): 91-97, 2012