Biomathematics Seminar: Modelling hormone dynamics within the plant root
24 February 2015 14:00 in Department of Mathematical Sciences
At the Centre for Plant Integrative Biology, we are using systems approaches to address questions in the Plant Sciences. In this talk, I will describe how we are developing mathematical models to investigate plant development, focusing on the particular example of how the hormone auxin controls plant root growth.
Within the root tip, auxin distribution plays a crucial role in specifying the developmental zones and controlling the root growth rate and direction. I will present three examples of how modelling is contributing our understanding of auxin-regulated growth, describing (i) how a parameterised network model was used to interpret data from a fluorescent auxin reporter to show how auxin controls the root growth direction, (ii) how multiscale asymptotic analysis revealed how the organ-scale auxin pattern is regulated at the cellular scale by the different families of membrane proteins, and (iii) how vertex-based modelling enabled us to simulate auxin dynamics within realistic multicellular root tissues which showed the root cap to be essential for the auxin distribution. Thus, our work demonstrates how multiscale mathematical models can be used to investigate the dynamic mechanisms regulating plant growth.
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