Unicellular alga

P aerugineum is a unicellular alga cultured under artificial or solar light in a freshwater medium supplied with CO2, in an outdoor bioreactor developed by Arad and Yaron. Algal growth was optimized for yield and for the properties of the blue color produced. The parameters that require close monitoring are light intensity and temperature, in order to avoid stress conditions that result in decreased color yield and solubility and increased biosynthesis of the polysaccharides that encapsulate the cells and are excreted into the medium. 

Schafer, H., H. Hettler, U. Fritsche, G. Pitzen, G. Roderer, and A. Wenzel. 1994. Biotests using unicellular algae and ciliates for predicting long-term effects of toxicants. Ecotoxicol. Environ. Safety 27 64-81. 

Hollister, T.A., G.E. Walsh, and J. Forester. 1975. Mirex and marine unicellular algae accumulation, population growth and oxygen evaluation. Bull. Environ. Contam. Toxicol. 14 753-759. 

Bottino, N.R., R.D. Newman, E.R. Cox, R. Stockton, M. Hoban, R.A. Zingaro, and K.J. Irgolic. 1978. The effects of arsenate and arsenite on the growth and morphology of the marine unicellular algae Tetraselmis chui (Chlorophyta) and Hymenomonas carterae (Chrysophyta). Jour. Exp. Mar. Biol. Ecol. 33 153-168. 

Disch, A., Schwender, J., Muller, C., Lichtenthaler, H.K., and Rohmer, M., Distribution of the mevalonate and glyceraldehyde phosphate/pyruvate pathways for isoprenoid biosynthesis in unicellular algae and the cyanobacterium Synechocystis PCC 6714, Biochem.., 333, 381, 1998. 

Sunda, W. G. and Huntsman, S. A. (1985). Regulation of cellular manganese and manganese transport rates in the unicellular alga Chlamydomonas, Limnol. Ocea-nogr., 30, 71-80. 

Diatoms are microscopic unicellular algae, with siliceous cell walls and the power of locomotion. 

Pohnert G (2005) Diatom/copepod interactions in plankton the indirect chemical defense of unicellular algae. ChemBioChem 6 946-959... 

Pohnert G (2004) Chemical defense strategies of marine organisms. In Schulz S (ed) Chemistry of pheromones and other semiochemicals, vol 1. Springer, Berlin, pp 179-219 Pohnert G (2005) Diatom/copepod interactions in plankton the indirect chemical defense of unicellular algae. ChemBioChem 6 946-959... 

Roenneberg, T. Nakamura, H. Cranmer, L.D. Ryan, K. Kishi, Y. Hastings, J.W. (1991) Gonyauline a novel endogenous substance shortening the period of the circadian clock of a unicellular alga. Experientia, 47, 103-6. 

Preliminary experiments in which HPLC/ICP-MS techniques have been used to monitor arsenic transformations within planktonic crustaceans feeding on a cultured unicellular alga containing arsenosugars at high concentrations have also been unable to demonstrate the production of arsenobetaine (98). Clearly there is much scope for work in this area. 

Emiliania huxleyi is a unicellular alga which is surrounded by a number of loose oval discs of calcium carbonate (coccoliths). It has been shown that the CaC03 of the... 

De Jong, L. W., Dam, W., Westbroek, P., Crenshaw, M. A. Aspects of calcification in Emiliania huxleyi (unicellular alga). In The mechanisms of mineralization in the invertebrates and plants. Watabe, N. Wilbur, K. M. (eds.). The Belle W. Baruch Library in Marine Science Vol. 5, pp. 135. University South Carolina Press 1976... 

Autospore One of the daughter cells formed by the internal division of the unicellular algae, duplicating in miniature the parent plant. 

The pathway also operates in some bacteria and apparently is the sole source of isoprenoid compounds for the unicellular alga Scenedesmus.28 The pathway is outlined in Fig. 22-2. Pyruvate is decarboxylated by a thiamin diphosphate-dependent enzyme,29 and the resulting enamine is condensed with D-glyceraldehyde 3-phosphate to form 1-deoxyxylulose 5-phosphate.28, i0 31a The latter undergoes an isomeroreductase rearrange-... 

Sulfonium compounds occur in a wide range of unicellular algae as well as red algae. They have been shown to be the major source of atmospheric sulfur compounds such as dimethyl sulfide and from methanethiol from the ocean, which has a central role ir he global sulfur cycle [143]. 

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