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- W2109108172 abstract "The influence of the sepA gene on the growth of Aspergillus nidulans has been investigated by characterizing and comparing the parental strain A28 (pabaA6 biA1) with the sepA null mutant (sepA4DeltaBM:). The sepA gene is known to affect the septation process in A. nidulans, therefore the sepA4DeltaBM: strain does not produce any septa during the first hours of growth. During batch cultivations sepA4DeltaBM: shows an abrupt decrease in specific growth rate and more pronounced fragmentation (in response to elevated stirrer speed) than the parental strain. Higher specific fragmentation rates (q(frag)) were obtained for the sepA4DeltaBM: strain. The physiological reasons for the differences have been investigated by employing fluorescent stains. Computerized image analysis revealed that the more pronounced fragmentation in the mutant was due to the lower number and irregular spacing of septa (visualized by calcofluor white staining), which resulted in a weaker hyphal structure that is more vulnerable to shear stress and fragmentation than the parental strain. This led to a loss of active biomass (determined by Mag fura staining) from the hyphae of the mutant, which had failed to compartmentalize by formation of septa, in turn resulting in decreased specific growth rates for the culture." @default.
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- W2109108172 date "2001-01-01" @default.
- W2109108172 modified "2023-10-16" @default.
- W2109108172 title "Morphological characterization of Aspergillus nidulans: growth, septation and fragmentation" @default.
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- W2109108172 doi "https://doi.org/10.1099/00221287-147-1-239" @default.
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