Auxin redistribution modulates plastic development of root system architecture under salt stress in Arabidopsis thaliana

  • Wang Y
  • Li K
  • Li X
  • 84

    Readers

    Mendeley users who have this article in their library.
  • 80

    Citations

    Citations of this article.

Abstract

Auxin plays an important role in the modulation of root system architecture. The effect of salinity on primary root growth has been extensively studied. However, how salinity affects lateral root development and its underlying molecular mechanisms is still unclear. Here, we report that high salt exposure suppresses lateral root initiation and organogenesis, resulting in the abortion of lateral root development. In contrast, salt stress markedly promotes lateral root elongation. Histochemical staining showed that the quantity of auxin and its patterning in roots were both greatly altered by exposure to high concentrations of salt, as compared with those found in the untreated control. Physiological experiments using transport inhibitors and genetic analysis revealed that the auxin transport pathway is important for salt-induced root development. These results demonstrate that auxin transport activities are required for remodeling lateral root formation and elongation and for adaptive root system development under salt stress. Crown Copyright © 2009.

Author-supplied keywords

  • Arabidopsis
  • Auxin
  • Lateral root
  • Root system architecture
  • Salt stress

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

  • Youning Wang

  • Kexue Li

  • Xia Li

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free