MIZ1-regulated hydrotropism functions in the growth and survival of Arabidopsis thaliana under natural conditions.

ABSTRACT:

Background and aims

Root hydrotropism is a response to water-potential gradients that makes roots bend towards areas of higher water potential. The gene MIZU-KUSSEI1 (MIZ1) that is essential for hydrotropism in Arabidopsis roots has previously been identified. However, the role of root hydrotropism in plant growth and survival under natural conditions has not yet been proven. This study assessed how hydrotropic response contributes to drought avoidance in nature.

Methods

An experimental system was established for the study of Arabidopsis hydrotropism in soil. Characteristics of hydrotropism were analysed by comparing the responses of the miz1 mutant, transgenic plants overexpressing MIZ1 (MIZ1OE) and wild-type plants.

Key results

Wild-type plants developed root system

SUBMITTER: Iwata S 

PROVIDER: S-EPMC3690989 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature