Chlorella pyrenoidosa

Chlorella pyrenoidosa 200-m ponds outdoor sunlight, continuous CO2, urea autotrophic or mixotrophic with acetate 6.0-7.0 19.0-30.5 34... 

In our previous research, we found that the antialgal allelochemical Ethyl 2-Methylacetoacetate (EMA) caused loss of cell membrane integrity. It hinted that EMA may cause a change in the membrane. It is reported that environmental stress may increase the concentration of ROS in plant cell. The excessive ROS may cause a decrease of antioxidation enzymes activity and lipid peroxidation. The effect of EMA on the activity of SOD and POD and lipid fatty acids of Chlorella pyrenoidosa, Chlorella vulagaris and Microcystis aeruginosa were evaluated to elucidate the mode of action of EMA. 

Gonzalez-Murua, C., A. Munoz-Rueda, F. Hernando, and M. Sanchez-Diaz. 1985. Effect of atrazine and methabenzthiazuron on oxygen evolution and cell growth of Chlorella pyrenoidosa. Weed Res. 25 61-66. Gorge, G. and R. Nagel. 1990. Toxicity of lindane, atrazine, and deltamethrin to early life stages of zebrafish (Brachydanio rerio). Ecotoxicol. Environ. Safety 20 246-255. 

Sijm, D.T.H.M., K.W. Broersen, D.F. De Roode, and P. Mayer. 1998. Bioconcentration kinetics of hydrophobic chemicals in different densities of Chlorella pyrenoidosa. Environ. Toxicol. Chem. 17 1695-1704. 

Algae are of vital importance in the primary production of the aquatic ecosystem because they are primary producers of the food chain. Several species of green algae are used in toxicity studies of pesticides, especially herbicides such as Chlorella vulgaris, Chlorella pyrenoidosa, or the standard test microalga... 

I. Yamazaki, M. Mimuro, N. Tamai, T. Yamazaki and Y. Fujita, Picosecond time-resolved fluorescence spectra of photosystem I and II in Chlorella pyrenoidosa, FEES Lett. 179, 65-68 (1985) and references therein. 

Bromacil and isocil have been found to be potent and specific inhibitors of photosynthesis at the chloroplast level [361]. The uptake of carbon dioxide is blocked in Chlorella pyrenoidosa and growth inhibition parallels the inhibition of carbon dioxide uptake. In Euglena gracilis and in spinach chloroplasts, the blockage of oxygen production was noted [361]. 

Green alga, Chlorella pyrenoidosa, boric acid... 

Fernandez, E., E. Sanchez, I. Bonilla, P. Mateo, and P. Ortega. 1984. Effect of boron on the growth and cell composition of Chlorella pyrenoidosa. Phyton 44 125-131. 

Maeso, E.S., E.E Valiente, I. Bonilla, and P Mateo. 1985. Accumulation of proteins in giant cells, induced by high boron concentrations in Chlorella pyrenoidosa. Jour. Plant Physiol. 121 301-311. 

The amount of 02 released when a suspension of algae (Chlorella pyrenoidosa) was excited with a train of short flashes of light, as a function of (a) the time between the flashes and (b) the intensity of the flashes. Each flash lasted about 10 /as. The total amount of 02 released was measured after several thousand flashes and was divided by the number of flashes and by the amount of chlorophyll in the suspension. (What happens on the first few flashes is discussed later.) The measurements in (a) were made with flashes comparable to the strongest flashes used in (b). For the measurements shown in (b), the flashes were spaced 20 ms apart. Note that the maximum amount of 02 released per flash was only one molecule of 02 per several thousand molecules of chlorophyll. With saturating flashes, the amount of 02 evolution is limited by the concentration of reaction centers, whereas most of the chlorophyll in the algae is part of the antenna system. 

Femandez-Casalderrey, A., Ferrando, M.D. and Andreu-Moliner, E. (1993) Chronic toxicity of methylparathion to the rotifer Brachionus calyciflorus fed on Nannochloris oculata and Chlorella pyrenoidosa, Hydrobiologia 255/256, 41-49. 

The effects of the nonylphenol in the Matacil 1.8D OSC formulation give greatest cause for concern. At a concentration of 1.1 pig/ml that has been found in the field (40), nonylphenol can significantly delay the growth of a population of Chlorella pyrenoidosa, where swathe overspray occurs, concentrations may be obtained that could kill the whole population of exposed cells (20). Delays in population growth in Chlamydomonas reinhardtii and Chlorella vulgaris was also observed after treatment with Aerotex (10). 

Morrison, G.M.P. and Florence, T.M. (1988) Comparison of physiochemical speciation procedures with metal toxicity to Chlorella pyrenoidosa. Anal. Chim. Acta, 209, 97-109. 

Bacillus subtilis, Flavobacterium harrisonii, Aspergillus sp., Chlorella pyrenoidosa, Paris et al. 1975 Paris Lewis 1976)... 

Cadmium (10 xm) inhibited C02 fixation of Chlorella pyrenoidosa by 62% (Hart and Scaife, 1977) a comparable decrease (74%) was found for spinach chloroplasts (Hampp et al., 1976). In-vivo external application of 450 pM cadmium reduced C02 fixation by only 34%, indicating that a large percentage of cadmium never reached the chloroplasts (Huang et al., 1974). 

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