Phosphate uptake by the yeast, Rhodotorula rubra, and the green alga, Selenastrum capricornutum Printz, after phosphate additions to steady-state continuous cultures

Phosphate uptake by yeast cells

Effect of heavy metals on lipids from the freshwater alga Selenastrum capricornutum.

Algae are a common component of freshwater ecosystems. The presence and abundance of these organisms has often been used as an indicator of water quality. In addition, algae such as Enteromorpha are able to accumulate pollutants, and have been used to monitor toxic trace metal pollution in aquatic environments [l]. In marine algae, heavy metal pollution has been shown to affect acyl-lipid compo...

Torularhodin Biosynthesis and Extraction by Yeast Cells of Rhodotorula Rubra

The paper presents the research work done to study the discontinuous bioprocess for the intracellular carotenoidic pigment torularhodin formation with the yeast Rhodotorula rubra ICCF 209. The growth and carotenoid biosynthesis of the yeast Rhodotorula rubra was studied by cultivation in 3.7 L Bioengineering AG lab bioreactor with mechanical stirring at an air flow rate of 200 L/h and agitation...

Improvement of carotenoid-synthesizing yeast Rhodotorula rubra by chemical mutagenesis.

A mutant Rhodotorula rubra with enhanced carotenoid-synthesizing activity for synthesizing total carotenoids and beta-carotene was obtained by N-methyl-N'-nitro-N-nitrosoguanidine mutagenesis. When co-cultivated with yogurt starter bacteria (Lactobacillus bulgaricus + Streptococcus thermophilus) in whey ultrafiltrate it produced 15.7 mg total carotenoids l(-1) culture fluid or 946 microg total ...

Cell reproductive patterns in the green alga Pseudokirchneriella subcapitata (=Selenastrum capricornutum) and their variations under exposure to the typical toxicants potassium dichromate and 3,5-DCP

Pseudokirchneriella subcapitata is a sickle-shaped freshwater green microalga that is normally found in unicellular form. Currently, it is the best known and most frequently used species of ecotoxicological bioindicator because of its high growth rate and sensitivity to toxicants. However, despite this organism's, our knowledge of its cell biology-for example, the patterns of nuclear and cytopl...