title: Submerged culture conditions for the production of mycelial biomass and antimicrobial metabolites by Polyporus tricholoma Mont.
abstract: Basidiomycete fungi of the Polyporus genus are a source of secondary metabolites which are of medicinal interest as antibacterial compounds. As these substances are produced in a small amount by the fungi, the study of the cultivation conditions in vitro that could possibly optimize their production seems of major importance. The effects of glucose and lactose, pH and agitation on biomass concentration and on the specific growth rate caused by the basidiomycete Polyporus tricholoma were investigated. The initial pH (4.5, 6.5 and 8.5) was autoregulated at pH 5.5, and the agitation increased the mycelial growth and the specific growth rate. The high concentration of carbon sources (4%) increased biomass production. The lactose concentration and the absence of agitation were determinant in the production of antibacterial metabolites. The characterization of the antibacterial substance by GC-MS indicated a major compound, isodrimenediol, produced by the fungus Polyporus tricholoma with activity against Staphylococcus aureus.
authors.affiliation: Departamento de Ciências Naturais, Universidade Regional de Blumenau, Blumenau, SC, Brasil e Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Santa Catarina , Florianópolis, SC , Brasil.
authors.forename: Gladys Rosane Thomé
authors.initials: GR
authors.lastname: Vieira
authors.forename: Mariane
authors.initials: M
authors.lastname: Liebl
authors.forename: Lorena Benathar Ballod
authors.initials: LB
authors.lastname: Tavares
authors.forename: Roberta
authors.initials: R
authors.lastname: Paulert
authors.forename: Artur
authors.initials: A
authors.lastname: Smânia Júnior
keywords: Polyporus tricholoma; antibacterial activity; isodrimenediol; specific growth rate
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