alexa The influence of culture conditions on mycelial structure and cellulase production by Trichoderma reesei Rut C-30.
Chemical Engineering

Chemical Engineering

Journal of Bioprocessing & Biotechniques

Author(s): Domingues FC, Queiroz JA, Cabral JM, Fonseca LP

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Abstract The morphology of Trichoderma reesei Rut C-30, during submerged cultivations in shake flask, was examined. The influence of the size inoculum and the composition of the fermentation medium on the morphology and cellulase production was studied. Different inoculum sizes were studied but the significative change in fungus morphology was observed for spores concentration between 10(5) and 10(7) spores/ml (i.e. 10(2) and 10(4) spores/ml in pre-culture medium). In the medium without Tween 80, at low inoculum size, the majority of the pellets were large and well individualized, in contrast, at higher inoculation densities small flocs were obtained, with higher production of soluble protein and higher filter paper activity. It was found that the average pellet size seems to be inversely proportional to the inoculum size. Medium composition, namely Tween 80, also influences the morphology of T. reesei Rut C-30 and enzyme production. The presence of Tween 80 in fermentation medium inhibited the pellet formation of this strain.
This article was published in Enzyme Microb Technol and referenced in Journal of Bioprocessing & Biotechniques

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