Introduction
Mathematical modelling continues to play a significant role in the development of our understanding of the growth and
function of hyphal networks. One of the main problems that faces modellers is the choice of scale. In the study of fungal
mycelia, scale is expressed in an extreme manner: the indeterminate growth habit of fungi ensures that models may
have to incorporate processes operating over scales ranging from the (sub) micron to the kilometre. Further complexity is
added when modelling physical and nutritional heterogeneity of the host environment and the resultant multifarious sensing and response events that media hyphal growth and thus determine network architecture. Most progress to date has been made by selecting a scale and developing appropriate models to address questions manifest at that chosen scale. However, as is now becoming apparent in other areas of biological research, a meaningful, systems-based understanding requires the transfer information across scales. This session show-cased state-of-the-art mathematical and computational approaches to both scale-specific and most importantly, crossscale problems in modelling fungal physiology and function.