Winkle, James J.Igoshin, Oleg A.Bennett, Matthew R.Josić, KrešimirOtt, William2017-11-152017-11-152017Winkle, James J., Igoshin, Oleg A., Bennett, Matthew R., et al.. "Modeling mechanical interactions in growing populations of rod-shaped bacteria." <i>Physical Biology,</i> 14, no. 5 (2017) IOP Publishing: https://doi.org/10.1088/1478-3975/aa7bae.https://hdl.handle.net/1911/98823Advances in synthetic biology allow us to engineer bacterial collectives with pre-specified characteristics. However, the behavior of these collectives is difficult to understand, as cellular growth and division as well as extra-cellular fluid flow lead to complex, changing arrangements of cells within the population. To rationally engineer and control the behavior of cell collectives we need theoretical and computational tools to understand their emergent spatiotemporal dynamics. Here, we present an agent-based model that allows growing cells to detect and respond to mechanical interactions. Crucially, our model couples the dynamics of cell growth to the cell's environment: Mechanical constraints can affect cellular growth rate and a cell may alter its behavior in response to these constraints. This coupling links the mechanical forces that influence cell growth and emergent behaviors in cell assemblies. We illustrate our approach by showing how mechanical interactions can impact the dynamics of bacterial collectives growing in microfluidic traps.engThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the IOP Press.Journal articlewinkle_et_al_2017https://doi.org/10.1088/1478-3975/aa7bae