The AUX1-AFB1-CNGC14 module establishes a longitudinal root surface pH profile.

ABSTRACT: Plant roots navigate in the soil environment following the gravity vector. Cell divisions in the meristem and rapid cell growth in the elongation zone propel the root tips through the soil. Actively elongating cells acidify their apoplast to enable cell wall extension by the activity of plasma membrane AHA H⁺-ATPases. The phytohormone auxin, central regulator of gravitropic response and root development, inhibits root cell growth, likely by rising the pH of the apoplast. However, the role of auxin in the regulation of the apoplastic pH gradient along the root tip is unclear. Here, we show, by using an improved method for visualization and quantification of root surface pH, that the Arabidopsis thaliana root surface pH shows distinct acidic and alkaline zones, which are no

SUBMITTER: Serre NBC 

PROVIDER: S-EPMC10414970 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature