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Surface colonization and tracking cell collectives.

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posted on 2021-05-13, 18:07 authored by Jordi van Gestel, Andreas Wagner

(a) Examples of surface-associated multicellularity, top–bottom: Bryophyta, Ascomycota, slime mold, and lichen (images are shown under the Creative Commons license from Wikimedia and Needpix; Rostislav Kralik, Jason Hollinger). (b) Schematic depiction of model adopted from [41]. Cells can occupy 2 environments: the surface and the bulk. In the bulk, cells freely move around. The surface is represented by a hexagonal grid to which cells can attach. Adhesive cells (red) can adhere to the surface independently. Nonadhesive cells (blue) can only adhere when neighboring an adhesive cell. (c) Processes of collective growth and collective reproduction. Collective reproduction can either result from fragmentation of the collective on the surface or from propagule production, where a cell detaches to the bulk. (d) Simplified depiction of lineage tracking from “birth” to “death” of a collective. Collective size is determined by the number of cells in the collective. Collective life span is determined by the number of time steps during which the collective exists.