Auxin increases the hydrogen peroxide (H2O2) concentration in tomato (Solanum lycopersicum) root tips while inhibiting root growth.

ABSTRACT:

Background and aims

The hormone auxin and reactive oxygen species (ROS) regulate root elongation, but the interactions between the two pathways are not well understood. The aim of this study was to investigate how auxin interacts with ROS in regulating root elongation in tomato, Solanum lycopersicum.

Methods

Wild-type and auxin-resistant mutant, diageotropica (dgt), of tomato (S. lycopersicum 'Ailsa Craig') were characterized in terms of root apical meristem and elongation zone histology, expression of the cell-cycle marker gene Sl-CycB1;1, accumulation of ROS, response to auxin and hydrogen peroxide (H2O2), and expression of ROS-related mRNAs.

Key results

The dgt mutant exhibited histological defects in the root apical meristem and elongation zone and displayed a con

SUBMITTER: Ivanchenko MG 

PROVIDER: S-EPMC3783245 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature