Dual role of pectin methyl esterase activity in the regulation of plant cell wall biophysical properties.

ABSTRACT:

Introduction

Acid-growth theory has been postulated in the 70s to explain the rapid elongation of plant cells in response to the hormone auxin. More recently, it has been demonstrated that activation of the proton ATPs pump (H⁺-ATPs) promoting acidification of the apoplast is the principal mechanism by which auxin and other hormones such as brassinosteroids (BR) induce cell elongation. Despite these advances, the impact of this acidification on the mechanical properties of the cell wall remained largely unexplored.

Methods

Here, we use elongation assays of Arabidopsis thaliana hypocotyls and Atomic Force Microscopy (AFM) to correlate hormone-induced tissue elongation and local changes in cell wall mechanical properties. Furthermore, employing transgenic lin

SUBMITTER: Gallemi M 

PROVIDER: S-EPMC12271113 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature