Abstract

The relationships between various growth characteristics of filamentous micro-organisms (fungi actinomycetes and some dimorphic yeasts) have been considered and the experimental data formulated into a novel theoretical model. The model incorporates the essential processes involved in colony formation, namely apical extension and branching of individual hyphae. The core of the model is a stochastic branching process, which links events at the hyphal level (three types of hyphae are considered) to an understanding of phenomena at the mycelial level. The model explains the form of existing empirical models of early mycelial growth and predicts new growth regularities, particularly with regard to the hyphal growth unit. The application of the model is illustrated by experimental data of the growth of mycelia of Rhizoctonia solani and Streptomyces coelicolor .

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