Reduced Fitness of Daphnia magna Fed a Bt-Transgenic Maize Variety
Open accessAbstract
Genetically modified (GM) maize expressing the Bt-toxin Cry1Ab (Bt-maize) was tested for effects on survival, growth, and reproduction of the water flea Daphnia magna, a crustacean arthropod commonly used as a model organism in ecotoxicological studies. In three repeated experiments, D. magna were fed 100% ground maize in suspension, using either GM or isogenic unmodified (UM) maize. D. magna fed GM-maize showed a significantly reduced fitness performance: The mortality was higher, a lower proportion of females reached sexual maturation, and the overall egg production was lower compared to D. magna fed UM isogenic maize. We conclude that the tested variety of Bt-maize and its UM counterpart do not have the same quality as food sources for this widely used model organism. The combination of a reduced fitness performance combined with earlier onset of reproduction of D. magna fed Bt-maize indicates a toxic effect rather than a lower nutritional value of the GM-maize.
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Insecticidal proteins similar to those from Bacillus thuringensis and Bacillus sphaericus have been expressed in plants and cyanobacteria and shown to be detrimental towards aquatic insects, aquatic larvae and daphnids.
“These proteins have already been expressed in plants and cyanobacteria, and shown to be detrimental towards aquatic insects, aquatic larvae and daphnids [73,83–85].”
From Biofuels from algae: Challenges and potential (2010) · cites this paper as [85]
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References 48 · Cited by 101
- Authors
- Bøhn, T., Primicerio, R., Hessen, D. O., & Traavik, T.
- Affiliations
- GenØk (NO)
- UiT The Arctic University of Norway (NO)
- University of Oslo (NO)
- Corresponding author
- Bøhn, Thomas
- Venue
- Archives of Environmental Contamination and Toxicology
- Published
- 2008-03-18
- Volume
- 55
- Issue
- 4
- Pages
- 584-592
- ISSN
- 0090-4341 (ISSN-L)
- 1432-0703
- OpenAlex
- W2036667950
- Cited by
- 101
- References
- 48
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 2 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 7 · 2018: 7 · 2017: 6 · 2016: 7 · 2015: 6 · 2014: 9 · 2013: 5 · 2012: 18
- FWCI
- 10.08
- Type
- journal article
- Language
- en
- Open access
- green
- hdl.handle.net
- Licence
- other-oa
- www.springer.com/tdm (tdm)
- Locations
- Archives of Environmental Contamination and Toxicology (publishedVersion)
- PubMed (publishedVersion)
- NORA - Norwegian Open Research Archives (submittedVersion, other-oa)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetically Modified Organisms Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Insect Resistance and Genetics
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
- Keywords
- Daphnia magna, Bt maize, Cry1Ab toxin, genetically modified crops, food quality, organismal fitness, mortality, sexual maturation, egg production, aquatic ecotoxicology
- MeSH terms
- Bacillus thuringiensis Toxins, Animals, Animal Feed, Bacterial Proteins, Zea mays, Daphnia, Endotoxins, Female, Growth, Hemolysin Proteins, Insecticides, Longevity, Oviposition, Pest Control, Biological, Plants, Genetically Modified, Body Size
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