Modelling time variations of root diameter and elongation rate as related to assimilate supply and demand.

ABSTRACT: In a given root system, individual roots usually exhibit a rather homogeneous tip structure although highly different diameters and growth patterns, and this diversity is of prime importance in the definition of the whole root system architecture and foraging characteristics. In order to represent and predict this diversity, we built a simple and generic model at root tip level combining structural and functional knowledge on root elongation. The tip diameter, reflecting meristem size, is used as a driving variable of elongation. It varies, in response to the fluctuations of photo-assimilate availability, between two limits (minimal and maximal diameter). The elongation rate is assumed to be dependent on the transient value of the diameter. Elongation stops when the tip reaches the minimal

SUBMITTER: Pages L 

PROVIDER: S-EPMC7475264 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature