Abstract
The axial growth of plant organs changes under genetic and environmental influences, which can be observed as alternations in cell proliferation and elongation. These aspects, however, are not mutually independent and each aspect consists of various factors. Therefore, it is necessary for comprehensive growth analysis to dissect such multiplex relationship quantitatively. We developed a simple mathematical model for this purpose and demonstrated that this model roughly fits the real growth of primary roots of Arabidopsis thaliana. In this work, we have improved the analytical procedure by incorporating a non-parametric smoothing method. With this improved analysis, we prove that the measured data of root growth in the Columbia strain agree well with the model estimates. We also show here that the model-assisted analysis is applicable for speculating aspects and factors responsible for inter-ecotype differences in root growth.
