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Growth and function of fungal mycelia in heterogeneous environments

  • Graeme P. Boswell
  • Helen Jacobs
  • Fordyce A. DavidsonEmail author
  • Geoffrey M. Gadd
  • Karl Ritz
Article

Abstract

As decomposer organisms, pathogens, plant symbionts and nutrient cyclers, fungi are of fundamental importance in the terrestrial environment. Moreover, in addition to their well-known applications in industry, many species also have great potential in environmental biotechnology. The study of this important class of organisms is difficult through experimental means alone due to the heterogeneity of their natural growth habitat and the microscopic scale of growth. In this work we present a mathematical model for colony expansion that is derived through consideration of the growth characteristics on the microscale. The model equations are of mixed hyperbolic-parabolic type and are treated with a numerical scheme that preserves positivity and conserves mass. The numerical solutions are compared against experimental results in a variety of environments. Thus the effect of different translocation mechanisms on fungal growth and function are identified. The derivation and analysis of an approximation to the full model yields further results concerning basic properties of mycelial growth. Finally, the acidification of the growth habitat is considered and the model thus provides important predictions on the functional consequences of the redistribution of internally-located material.

Keywords

Fungal Growth Mineral Salt Medium Bromocresol Purple External Substrate Central Droplet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Society for Mathematical Biology 2003

Authors and Affiliations

  • Graeme P. Boswell
    • 1
  • Helen Jacobs
    • 2
  • Fordyce A. Davidson
    • 1
    Email author
  • Geoffrey M. Gadd
    • 2
  • Karl Ritz
    • 3
  1. 1.Department of MathematicsUniversity of DundeeDundeeUK
  2. 2.Division of Environmental and Applied Biology, Biological Sciences Institute, School of Life SciencesUniversity of DundeeDundeeUK
  3. 3.Soil-Plant Dynamics GroupScottish Crop Research InstituteInvergowrieUK

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