The Arabidopsis pop2-1 mutant reveals the involvement of GABA transaminase in salt stress tolerance.

ABSTRACT:

Background

GABA (gamma-aminobutyric acid) is a non protein amino acid that has been reported to accumulate in a number of plant species when subjected to high salinity and many other environmental constraints. However, no experimental data are to date available on the molecular function of GABA and the involvement of its metabolism in salt stress tolerance in higher plants. Here, we investigated the regulation of GABA metabolism in Arabidopsis thaliana at the metabolite, enzymatic activity and gene transcription levels upon NaCl stress.

Results

We identified the GABA transaminase (GABA-T), the first step of GABA catabolism, as the most responsive to NaCl. We further performed a functional analysis of the corresponding gene POP2 and demonstrated that the previously isolated l

SUBMITTER: Renault H 

PROVIDER: S-EPMC2825238 | biostudies-literature | 2010 Feb

REPOSITORIES: biostudies-literature