In the root apex, cell length is a function of its position within a cell file. Applying a mathematical approach using a multiple structural change (MSC) algorithm, Pacheco-Escobedo et al. developed a spatial model to identify that the growing part of Arabidopsis root is composed of three discrete developmental zones: the proliferation domain (PD), the transition domain (TD), and the elongation zone (EZ).
The PD and the TD comprise the root apical meristem (RAM). The MSC approach enables unambiguous, rapid, and automated determination of the RAM/ EZ and the PD/TD boundaries. This publicly available tool facilitates root phenotyping of different genetic backgrounds and experimental treatments.
This paper is part of the Root Biology Special Issue.