A plausible mechanism for longitudinal lock-in of the plant cortical microtubule array after light-induced reorientation.

ABSTRACT: The light-induced reorientation of the cortical microtubule array in dark-grown Arabidopsis thaliana hypocotyl cells is a striking example of the dynamical plasticity of the microtubule cytoskeleton. A consensus model, based on katanin-mediated severing at microtubule crossovers, has been developed that successfully describes the onset of the observed switch between a transverse and longitudinal array orientation. However, we currently lack an understanding of why the newly populated longitudinal array direction remains stable for longer times and re-equilibration effects would tend to drive the system back to a mixed orientation state. Using both simulations and analytical calculations, we show that the assumption of a small orientation-dependent shift in microtubule dynamic

SUBMITTER: Saltini M 

PROVIDER: S-EPMC10095967 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature