Chronic effects of cyanobacterial toxins on Daphnia magna and their offspring

Dao, Thanh Son; Do-Hong, Lan-Chi; Wiegand, Claudia

doi:10.1016/j.toxicon.2010.01.014

Cited by 103 publications

(112 citation statements)

References 46 publications

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“…Further, low food quality and low toxicity may act together on D. magna fitness, producing malnutrition and impairment of feeding and digestion, respectively, resulting in less energy available for maintenance, growth, and reproduction (Dao et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Chronic Responses ofDaphnia magnaUnder Dietary Exposure to Leaves of a Transgenic (Event MON810) Bt–Maize Hybrid and its Conventional Near-Isoline

Holderbaum

Cuhra

Wickson

et al. 2015

Journal of Toxicology and Environmental Health, Part A

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Insect resistance is the second most common trait globally in cultivated genetically modified (GM) plants. Resistance is usually obtained by introducing into the plant's genome genes from the bacterium Bacillus thuringiensis (Bt) coding for insecticidal proteins (Cry proteins or toxins) that target insect pests. The aim of this study was to examine the hypothesis that a chronic, high-dose dietary exposure to leaves of a Bt-maize hybrid (GM event MON810, expressing a transgenic or recombinant Cry1Ab toxin), exerted no adverse effects on fitness parameters of the aquatic nontarget organism Daphnia magna (water flea) when compared to an identical control diet based on leaves of the non-GM near-isoline. Cry1Ab was immunologically detected and quantified in GM maize leaf material used for Daphnia feed. A 69-kD protein near Bt's active core-toxin size and a 34-kD protein were identified. The D. magna bioassay showed a resource allocation to production of resting eggs and early fecundity in D. magna fed GM maize, with adverse effects for body size and fecundity later in life. This is the first study to examine GM-plant leaf material in the D. magna model, and provides of negative fitness effects of a MON810 maize hybrid in a nontarget model organism under chronic, high dietary exposure. Based upon these results, it is postulated that the observed transgenic proteins exert a nontarget effect in D. magna and/or unintended changes were produced in the maize genome/metabolome by the transformation process, producing a nutritional difference between GM-maize and non-GM near-isoline.

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Section: Discussionmentioning

confidence: 99%

Chronic Responses ofDaphnia magnaUnder Dietary Exposure to Leaves of a Transgenic (Event MON810) Bt–Maize Hybrid and its Conventional Near-Isoline

Holderbaum

Cuhra

Wickson

et al. 2015

Journal of Toxicology and Environmental Health, Part A

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“…Microcystins are cyanotoxins that have lipophilic properties and can be ingested by Daphnia, accumulated in their lipids, and thus transferred from mother to progeny during egg formation. The abortion of eggs in the presence of toxic M. aeruginosa was reported by Gustafsson et al (2005) and Dao et al (2010). Furthermore, the latter study showed that toxic cyanobacteria can cause not only egg abortion/decomposition in Daphnia but also malformation of neonates.…”

Section: Introductionmentioning

confidence: 76%

“…Of the phenotypic traits of Daphnia that are negatively affected by cyanobacteria, the reproduction seems to be most sensitive. Toxic cyanobacteria may affect Daphnia reproduction not only by suppressing its fecundity but also by increasing the number of aborted eggs or causing egg/ embryo malformation and/or decomposition (Reinikainen et al, 1995;Claska & Gilbert, 1998;Gustafsson et al, 2005;Dao et al, 2010). Reinikainen et al (1995) suggested that cyanotoxins can disturb the development of Daphnia eggs and embryos.…”

Section: Introductionmentioning

confidence: 99%

Effect of non-toxic, filamentous cyanobacteria on egg abortion in Daphnia under various thermal conditions

Bednarska

Ślusarczyk

2012

Hydrobiologia

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The aim of this study was to examine whether the presence of non-toxic filamentous cyanobacteria can cause egg abortion in Daphnia. To test this hypothesis, we fed females of Daphnia pulicaria with the green alga Scenedesmus obliquus from birth until eggs were laid in the brood chamber. Gravid Daphnia females were then exposed to media containing either S. obliquus or filaments of a non-toxic strain of the cyanobacterium Cylindrospermopsis raciborskii. The females were then observed throughout the whole period of egg development and all events of egg abortion were recorded. Experiments were conducted at three temperatures: 16, 20, and 24°C. In the presence of cyanobacteria, the proportion of aborted eggs ranged from 2.6 to 12.9%, compared with 0-1.8% in the green algae treatment. The number of aborted eggs, but not the number of egg-aborting females, tended to increase at higher temperature. Our data indicate that interference by non-toxic cyanobacterial filaments may affect the reproductive success of Daphnia, not only through suppression of their fecundity, but also via an increase in the number of aborted eggs. Therefore, the reproductive rate of Daphnia based on the fecundity of females may be overestimated in situations where filamentous cyanobacteria are present.

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“…Although Daphnia has been shown to resist toxicity and suppress cyanobacteria (Chislock et al, 2013), chronic exposure may prohibit the development of substantial populations in natural systems (Dao et al, 2010).…”

Section: Zooplanktonmentioning

confidence: 99%

Outcomes of submerged macrophyte restoration in a shallow impounded, eutrophic river

2015

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Chronic effects of cyanobacterial toxins on Daphnia magna and their offspring

Cited by 103 publications

References 46 publications

Chronic Responses ofDaphnia magnaUnder Dietary Exposure to Leaves of a Transgenic (Event MON810) Bt–Maize Hybrid and its Conventional Near-Isoline

Chronic Responses ofDaphnia magnaUnder Dietary Exposure to Leaves of a Transgenic (Event MON810) Bt–Maize Hybrid and its Conventional Near-Isoline

Effect of non-toxic, filamentous cyanobacteria on egg abortion in Daphnia under various thermal conditions

Outcomes of submerged macrophyte restoration in a shallow impounded, eutrophic river

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