Summary: A study was made of growth, septation and branching in Geotrichum candidum, a mould which forms physiologically complete septa. A correlation was observed between septation and branch initiation; branches were almost invariably formed just behind septa. Primary branches and their parent intercalary compartments initially increased in length at an exponential rate before eventually attaining a constant rate of extension. The whole branching system (which eventually contained seven tips) produced by an intercalary compartment increased in length exponentially until it attained a total length of at least 1·5 mm.
The total length and the number of nuclei of undifferentiated mycelia increased exponentially at the same specific growth rate. The results suggest that nuclei divide just before or just after arthrospore formation.
Bartnicki-GarciaS.1973; Fundamental aspects of hyphal morphogenesis. In Microbial Differentiation.AshworthJ.M., SmithJ.E. Edited by Cambridge: Cambridge University Press.;
SteeleG.C., TrinciA.P.J.1975; Morphology and growth kinetics of hyphae of differentiated and undifferentiated mycelia of Neurospora crassa. Journal of General Microbiology 91:362–368
TrinciA.P.J.1970; Kinetics of apical and lateral branching in Aspergillus nidulans and Geotrichum lactis. Transactions of the British Mycological Society 55:17–28
TrinciA.P.J.1971; Influence of the width of the peripheral growth zone on the radial growth rate of fungal colonies on solid media. Journal of General Microbiology 67:325–344
TrinciA.P.J.1973; Growth of wild-type mid spreading colonial mutants of Neurospora crassa in batch culture and on agar medium. Archiv für Mikrobiologie 91:113–126
TrinciA.P.J., CollingeA.J.1973; Structure and plugigng of septa of wild-type and spreading colonial mutants of Neurospora crassa. Archiv für Mikrobiologie 91:355–364
TrinciA.P.J., CollingeA.J.1974a; Spore formation in nitrogen and carbon starved cultures of Geotrichum candidum and Mucor racemosus. Transactions of the British Mycological Society 62:351–358