An altered hydrotropic response (ahr1) mutant of Arabidopsis recovers root hydrotropism with cytokinin.

ABSTRACT: Roots are highly plastic and can acclimate to heterogeneous and stressful conditions. However, there is little knowledge of the effect of moisture gradients on the mechanisms controlling root growth orientation and branching, and how this mechanism may help plants to avoid drought responses. The aim of this study was to isolate mutants of Arabidopsis thaliana with altered hydrotropic responses. Here, altered hydrotropic response 1 (ahr1), a semi-dominant allele segregating as a single gene mutation, was characterized. ahr1 directed the growth of its primary root towards the source of higher water availability and developed an extensive root system over time. This phenotype was intensified in the presence of abscisic acid and was not observed if ahr1 seedlings were grown in a water stress m

SUBMITTER: Saucedo M 

PROVIDER: S-EPMC3388826 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature