Transcriptome responses to aluminum stress in roots of aspen (Populus tremula).

ABSTRACT:

Background

Ionic aluminum (mainly Al3+) is rhizotoxic and can be present in acid soils at concentrations high enough to inhibit root growth. Many forest tree species grow naturally in acid soils and often tolerate high concentrations of Al. Previously, we have shown that aspen (Populus tremula) releases citrate and oxalate from roots in response to Al exposure. To obtain further insights into the root responses of aspen to Al, we investigated root gene expression at Al conditions that inhibit root growth.

Results

Treatment of the aspen roots with 500 μM Al induced a strong inhibition of root growth within 6 h of exposure time. The root growth subsequently recovered, reaching growth rates comparable to that of control plants. Changes in gene expression were determined after 6

SUBMITTER: Grisel N 

PROVIDER: S-EPMC3017830 | biostudies-literature | 2010 Aug

REPOSITORIES: biostudies-literature