title: Fatty acid and carotenoid production by Sporobolomyces ruberrimus when using technical glycerol and ammonium sulfate.
abstract: The production of carotenoids, lipid content, and fatty acid composition were all studied in a strain of Sporobolomyces ruberrimus when using different concentrations of technical glycerol as the carbon source and ammonium sulfate as the nitrogen source. The total lipids represented an average of 13% of the dry weight, and the maximum lipids were obtained when using 65.5 g/l technical glycerol (133.63 mg/ g). The optimal conditions for fatty acid production were at 27 degrees C using 20 g of ammonium sulfate and a pH range from 6 to 7, which produced a fatty acid yield of 32.5+/-1 mg/g, including 1.27+/- 0.15 mg of linolenic acid (LNA), 7.50+/-0.45 mg of linoleic acid (LLA), 5.50+/-0.35 mg of palmitic acid (PA), 0.60+/-0.03 mg of palmitoleic acid (PAL), 1.28+/-0.11 mg of stearic acid (SA), 9.09+/-0.22 mg of oleic acid, 2.50+/-0.10 mg of erucic acid (EA), and 4.25+/-0.20 mg of lignoceric acid (LCA), where the palmitic, oleic, and linoleic acids combined formed about 37% of the total fatty acids. The concentration of total carotenoids was 2.80 mg/g when using 20 g of ammonium sulfate, and consisted of torularhodin (2.70 mg/g) and beta-carotene (0.10 mg/ g), at 23 degrees C and pH 6. However, the highest amount with the maximum specific growth rate was obtained (micromax=0.096 h(-1)) with an ammonium sulfate concentration of 30 g/l.
authors.affiliation: Department of Food Science & Engineering, Faculty of Biosystem Engineering, University of Tehran, Karaj, Iran. srazavi@ut.ac.ir
authors.forename: Seyed Hadi
authors.initials: SH
authors.lastname: Razani
authors.forename: Seyed Mohammad
authors.initials: SM
authors.lastname: Mousavi
authors.forename: Hassan Mehrabani Mehrabanii
authors.initials: HM
authors.lastname: Yeganeh
authors.forename: Ivan
authors.initials: I
authors.lastname: Marc
mesh_terms: D000645:Ammonium Sulfate / Q000378:metabolism*; D001487:Basidiomycota / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D019149:Bioreactors; D002338:Carotenoids / Q000096:biosynthesis*; D005227:Fatty Acids / Q000032:analysis / Q000096:biosynthesis*; D005990:Glycerol / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D050356:Lipid Metabolism; D008055:Lipids / Q000737:chemistry; D013696:Temperature
chemical_list: D005227:Fatty Acids; D008055:Lipids; D002338:Carotenoids; D005990:Glycerol; D000645:Ammonium Sulfate