title: Production of pectinases by Aspergillus niger in solid state fermentation at high initial glucose concentrations.
abstract: Exopectinase (exo-p) and endopectinase (endo-p) production by Aspergillus niger CH4 in solid state culture was studied at initial glucose concentrations of 100, 250, 350 and 450 g/l. The highest activity of exo-p (35 U/g) was produced at 72 and 120 h in the medium containing 100 and 250 g glucose/l, respectively. The maximum endo-p activity (9 U/g) was produced at 72 h in the medium with 250 g glucose/l. The reduction in pectinase production at 350 and 450 g/l initial glucose concentration was due neither to repression of the synthesis of the enzyme nor to the glucose consumption rate of the strain but due to a drastic drop in pH of the medium.
authors.affiliation: , .
authors.forename: S
authors.initials: S
authors.lastname: Solis-Pereyra
authors.forename: E
authors.initials: E
authors.lastname: Favela-Torres
authors.forename: M
authors.initials: M
authors.lastname: Gutiérrez-Rojas
authors.forename: S
authors.initials: S
authors.lastname: Roussos
authors.forename: G
authors.initials: G
authors.lastname: Saucedo-Castañeda
authors.forename: P
authors.initials: P
authors.lastname: Gunasekaran
authors.forename: G
authors.initials: G
authors.lastname: Viniegra-González