title: Production of Aspergillus niger catalase under various stress conditions.
abstract: The conidia of Aspergillus niger were cultured under various stress conditions. The highest yield of catalase activity was obtained after addition 1.2 M NaCl to 6-h-old culture, which improved the activity of the enzyme by about 2.8-fold in comparison with the control medium without this depressor. A significantly lower increase (1.3- to 1.7-fold) in catalase activity was reached when spores were incubated under oxidative stress (100-200 mM H2O2) or at low pH (2 and 3). Respiratory activities in A. niger culture show important changes with the osmotic stress increase.
authors.affiliation: Department of Industrial Microbiology, Maria Curie-Sklodowska University, Lublin, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Fiedurek
mesh_terms: D001234:Aspergillus niger / Q000201:enzymology* / Q000502:physiology; D002374:Catalase / Q000096:biosynthesis*; D003470:Culture Media; D009997:Osmotic Pressure; D018384:Oxidative Stress
chemical_list: D003470:Culture Media; D002374:Catalase