Differential biosynthesis and cellular permeability explain longitudinal gibberellin gradients in growing roots.

ABSTRACT: Control over cell growth by mobile regulators underlies much of eukaryotic morphogenesis. In plant roots, cell division and elongation are separated into distinct longitudinal zones and both division and elongation are influenced by the growth regulatory hormone gibberellin (GA). Previously, a multicellular mathematical model predicted a GA maximum at the border of the meristematic and elongation zones. However, GA in roots was recently measured using a genetically encoded fluorescent biosensor, nlsGPS1, and found to be low in the meristematic zone grading to a maximum at the end of the elongation zone. Furthermore, the accumulation rate of exogenous GA was also found to be higher in the elongation zone. It was still unknown which biochemical activities were responsible for these mobile sm

SUBMITTER: Rizza A 

PROVIDER: S-EPMC7923382 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature