Transcriptional and cellular effects of benzotriazole UV stabilizers UV-234 and UV-328 in the freshwater invertebrates Chlamydomonas reinhardtii and Daphnia magna

2017 ◽  
Vol 36 (12) ◽  
pp. 3333-3342 ◽  
Author(s):  
Maeva Giraudo ◽  
Guillaume Cottin ◽  
Marta Esperanza ◽  
Pierre Gagnon ◽  
Amila O. De Silva ◽  
...  
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Daphnia Magna ◽  
Freshwater Invertebrates ◽  
Cellular Effects

A Tribute to Richard A. Vollenweider (1922-2007)

2007 ◽  
Vol 42 (1) ◽  
pp. iv-iv
Author(s):  
J.R. Vallentyne
Keyword(s):  
Daphnia Magna ◽  
Dry Weight ◽  
Chironomus Riparius ◽  
Tubifex Tubifex ◽  
Poor Control ◽  
Freshwater Invertebrates ◽  
Test Species ◽  
Physella Gyrina ◽  
Hexagenia Limbata ◽  
Control Survival

Abstract This study evaluates the suitability of using Hyalella azteca as a predictor of the risk that tributyltin (TBT) poses to freshwater invertebrates by comparing the toxicity and bioaccumulation of TBT in H. azteca to five species: Hexagenia limbata, Physella gyrina, Tubifex tubifex, Chironomus riparius and Daphnia magna. Young from each species were added to aquaria containing sediment spiked with TBT concentrations of 0, 28.6, 258 and 1900 ng Sn/g dry weight. Chironomus riparius data could not be quantified reliably due to poor control survival. Bioaccumulation of TBT in the five remaining species was similar at sediment concentrations of 258 ng Sn/g, and the bioaccumulation relationships of P. gyrina and H. azteca were virtually identical. No toxicity was evident in any test species at body concentrations of 1100 to 1800 ng Sn/g. Body concentrations of 4000 to 6000 ng Sn/g were associated with significant (p < 0.05) mortality in H. limbata, P. gyrina, T. tubifex and D. magna, but not in H. azteca. However, bioaccumulation of TBT in H. azteca was comparable and can be used in predicting the effects of environmental TBT concentrations on these four species of freshwater invertebrates.

Transgenic and cell wall-deficient Chlamydomonas reinhardtii food affects life history of Daphnia magna

2019 ◽  
Vol 32 (1) ◽  
pp. 319-328
Author(s):  
Felicitas Buchberger ◽  
Herwig Stibor ◽  
Daniel Neusius ◽  
Jörg Nickelsen ◽  
Maria Stockenreiter
Keyword(s):  
Cell Wall ◽  
Life History ◽  
Chlamydomonas Reinhardtii ◽  
Daphnia Magna ◽  
History Of

scholarly journals Effect of Alkylphenols on Motility of Unicellular Green Algae Chlamydomonas reinhardtii and Crustacea Daphnia magna

2005 ◽  
Vol 28 (5) ◽  
pp. 333-338 ◽  
Author(s):  
Hitoshi TANAKA ◽  
Osamu NISHIMURA ◽  
Shogo NAKAMURA ◽  
Ryuichi SUDO
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Daphnia Magna ◽  
Green Algae

Membrane-bound vesicles associated with the microvilli in the midgut of the freshwater microcrustacean, Daphnia magna

1983 ◽  
Vol 41 ◽  
pp. 480-481
Author(s):  
Patricia L. Jansma
Keyword(s):  
Daphnia Magna ◽  
Intestinal Epithelial Cells ◽  
Uranyl Acetate ◽  
Intestinal Epithelial ◽  
Chlamydomonas Reinhardii ◽  
Thin Sections ◽  
Saturated Water ◽  
Cacodylate Buffer ◽  
Membrane Bound ◽  
Ethanol Series

The presence of the membrane bound vesicles or blebs on the intestinal epithelial cells has been demonstrated in a variety of vertebrates such as chicks, piglets, hamsters, and humans. The only invertebrates shown to have these microvillar blebs are two species of f1ies. While investigating the digestive processes of the freshwater microcrustacean, Daphnia magna, the presence of these microvillar blebs was noticed.Daphnia magna fed in a suspension of axenically grown green alga, Chlamydomonas reinhardii for one hour were narcotized with CO2 saturated water. The intestinal tracts were excised in 2% glutaraldehyde in 0.2 M cacodyl ate buffer and then placed in fresh 2% glutaraldehyde for one hour. After rinsing in 0.1 M cacodylate buffer, the sample was postfixed in 2% OsO4, dehydrated with a graded ethanol series, infiltrated and embedded with Epon-Araldite. Thin sections were stained with uranyl acetate and Reynolds lead citrate before viewing with the Philips EM 200.

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