Comparative metabolite profiling of two rice genotypes with contrasting salt stress tolerance at the seedling stage.

ABSTRACT:

Background

Rice is sensitive to salt stress, especially at the seedling stage, with rice varieties differing remarkably in salt tolerance (ST). To understand the physiological mechanisms of ST, we investigated salt stress responses at the metabolite level.

Methods

Gas chromatography-mass spectrometry was used to profile metabolite changes in the salt-tolerant line FL478 and the sensitive variety IR64 under a salt-stress time series. Additionally, several physiological traits related to ST were investigated.

Results

We characterized 92 primary metabolites in the leaves and roots of the two genotypes under stress and control conditions. The metabolites were temporally, tissue-specifically and genotype-dependently regulated under salt stress. Sugars and amino acids (AAs)

SUBMITTER: Zhao X 

PROVIDER: S-EPMC4179258 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature