title: [Production of biomass and ligninolytic enzymes by Pleurotus ostreatus in submerged culture.].
abstract: The production of biomass and ligninolytic enzymes by Pleurotus ostreatus was analysed in synthetic medium with yeast extract and different glucose concentrations (0.5 - 20 g/l), at different pH (3.5-6.5) and incubation temperatures (23-32 degrees C). The best culture condition were: initial glucose concentration of 5 g/l, initial pH between 5.5-6.5 and incubation temperature between 26-29 degrees C. The saturation constant for glucose (Ks) was 1.75 g/l. The biomass concentration reached 8.6 g/l with a glucose addition of 20.0 g/l to the culture medium. The control of pH allowed an increment of 0.5 g/l of biomass concentration. The birreactor produced pellets with a homogeneous distribution of diameter size of 3.4 -/+ 0.2 mm. Approximately, 307 U/l of laccase and 0.41 U/l of manganese peroxidase were obtained in extracellular liquid medium and 0.015 U/g of laccase and 0.809 U/g of manganese peroxidase were obtained in solid substrate. Lignin peroxidase activity was not detected at any condition.
authors.affiliation: El Colegio de la Frontera Sur (ECOSUR), Departamento de Biotecnología Ambiental, Tapachula, Chiapas, México. fmarquez@cicese.mx.
authors.forename: G K
authors.initials: GK
authors.lastname: Guillén-Navarro
authors.forename: F J
authors.initials: FJ
authors.lastname: Márquez-Rocha
authors.forename: J E
authors.initials: JE
authors.lastname: Sanchez-Vázquez