Interactions between the solvent acetone and the pyrethroid insecticide permethrin on activities of the blue-green algaAnabaena

Toxic Effects of Organic Solvents on the Growth of Chlorella vulgaris and Selenastrum capricornutum

“…As shown in this study, the solvent effects vary depending on the concentrations selected as well as on the species used in the bioassay (Figures 1 and 2). Similar effects were also observed by Stratton et al (1980) who showed a variability in the effects with different blue-green algae species grown in the presence of acetone. In our study, C. vulgaris was generally more sensitive to the solvents tested than S. capricornutum except for DMF.…”

Effect of organic solvents on growth of freshwater algae

“…These data are in agreement with Adams et al [21] who concluded that acetone is the main solvent used in toxicity tests involving algae and is the solvent of choice in many other bioassay system [22] because of its superior solvent properties. An acetone concentration > 1.0% usually causes a severe inhibition of photosynthesis nitrogen fixation and heterocyst formation in Anabaena sp, while < 1.0 to 0.4% stimulated these processes [7,9]. DMSO was also found to be a suitable solvent to use in toxicity bioassays with respect to green alga S. quadricauda than A. flosaquae where there were some fluctuations in chl (a) content between treatments on the 7th day of the incubation period.…”

“…Scenedesmus quadricauda of green algae and Anabaena flos-aquae of blue green algae were isolated from the Nile river water and recultivated under controlled conditions. Stock cultures were grown in 1L Erlenmeyer flask sealed with cotton bungs and containing 800 mL of an inorganic nitrogen-free medium [9]. Flasks were incubated at 25±1°C and light intensity of 1800 Lux for S. qadricauda and 2400 Lux for A. flos-aquae.…”

Pesticide Effects on Soil Algae and Cyanobacteria

“…The possible consequence of using such solvents in pesticide bioassays has been addressed by Stratton (1989), Stratton and Corke (1981), and Stratton et al (1980). In 1980, Stratton et al cautioned that acetone, a much used solvent, may be able to interact with pesticides to elicit misleading responses in test organisms.…”