Abstract
Two models of the mechanism maintaining a zonal structure in the shoot apical meristem (SAM) were built based on the analysis of experimental data on the interactions between CLV1, CLV2, CLV3, and WUS genes and the concepts of their role in this mechanism. The first model, a simple one-dimensional model with two morphogens, which is a variant of Wolpert’s French flag model [1], describes the regulation of zone distribution along the SAM vertical axis. Despite a number of simplifications, this model has stationary solutions with biologically meaningful interpretation. The simplifying assumptions were successively abandoned in constructing a two-dimensional model of the mechanism underlying the regulation of SAM structure. This model provides a better understanding of the distributed system that regulates the SAM structure, and allows more detailed formalization of the modern concepts and experimental data concerning this mechanism.
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