Mechanical modelling quantifies the functional importance of outer tissue layers during root elongation and bending.

ABSTRACT: Root elongation and bending require the coordinated expansion of multiple cells of different types. These processes are regulated by the action of hormones that can target distinct cell layers. We use a mathematical model to characterise the influence of the biomechanical properties of individual cell walls on the properties of the whole tissue. Taking a simple constitutive model at the cell scale which characterises cell walls via yield and extensibility parameters, we derive the analogous tissue-level model to describe elongation and bending. To accurately parameterise the model, we take detailed measurements of cell turgor, cell geometries and wall thicknesses. The model demonstrates how cell properties and shapes contribute to tissue-level extensibility and yield. Exploiting the highly

SUBMITTER: Dyson RJ 

PROVIDER: S-EPMC4286105 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature