The developmental and environmental regulation of gravitropic setpoint angle in Arabidopsis and bean.

ABSTRACT: Root and shoot branches are major determinants of plant form and critical for the effective capture of resources below and above ground. These branches are often maintained at specific angles with respect to gravity, known as gravitropic set point angles (GSAs). We have previously shown that the mechanism permitting the maintenance of non-vertical GSAs is highly auxin-dependent and here we investigate the developmental and environmental regulation of root and shoot branch GSA. We show that nitrogen and phosphorous deficiency have opposing, auxin signalling-dependent effects on lateral root GSA in Arabidopsis: while low nitrate induces less vertical lateral root GSA, phosphate deficiency results in a more vertical lateral root growth angle, a finding that contrasts with the previously repor

SUBMITTER: Roychoudhry S 

PROVIDER: S-EPMC5335621 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature