title: Mycelial pellet formation by Rhizopus oryzae ATCC 20344.
abstract: Factors in a cultivation medium affecting fungal growth morphology and fumaric acid production by Rhizopus oryzae ATCC 20344 were investigated. These factors included the initial pH value and trace metals such as zinc, magnesium, iron, and manganese in the cultivation medium. It was found that a significant change in the growth morphology of R. oryzae ATCC 20344 occurs when the initial pH value is varied. A lower initial pH value in the cultivation medium was inhibitory to fungal growth, and fast growth in the cultivation medium at a higher initial pH value promoted the formation of large pellets or filamentous forms. Trace metals in the cultivation media also had significant effects on pellet formation and fumaric acid fermentation.
authors.affiliation: Laboratory of Renewable Resources of Engineering, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhou
authors.forename: J
authors.initials: J
authors.lastname: Du
authors.forename: G T
authors.initials: GT
authors.lastname: Tsao
mesh_terms: D002413:Cations, Divalent / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid; D003470:Culture Media; D005650:Fumarates / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D012233:Rhizopus / Q000166:cytology / Q000187:drug effects / Q000502:physiology*; D014131:Trace Elements / Q000494:pharmacology
chemical_list: D002413:Cations, Divalent; D003470:Culture Media; D005650:Fumarates; D014131:Trace Elements; C032005:fumaric acid