Priming and positioning of lateral roots in Arabidopsis. An approach for an integrating concept.

ABSTRACT: Branching by de novo formation of lateral roots along the primary root of Arabidopsis seedlings follows a complex longitudinal and transverse pattern. How this pattern is generated is presently under debate. The 'bending hypothesis' proposes that lateral root primordia are initiated by a local accumulation of auxin at the convex side of bends resulting from deflections through obstacles, gravitropic bending, or other means. In contrast, the 'oscillation hypothesis' proposes the existence of an endogenous clock-type oscillator mechanism producing periodic pulses of gene expression in the root tip that determine the future sites of primordium initiation. Here we report physiological experiments dissecting periodic priming signals, pre-disposing the root to rhythmic lateral root formation, fr

SUBMITTER: Kircher S 

PROVIDER: S-EPMC4762386 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature