High-level expression of sugar inducible gene2 (HSI2) is a negative regulator of drought stress tolerance in Arabidopsis.

ABSTRACT:

Background

HIGH-LEVEL EXPRESSION OF SUGAR INDUCIBLE GENE2 (HSI2), also known as VAL1, is a B3 domain transcriptional repressor that acts redundantly with its closest relative, HSI2-LIKE1 (HSL1), to suppress the seed maturation program following germination. Mutant hsi2 hsl1 seedlings are arrested early in development and differentially express a number of abiotic stress-related genes. To test the potential requirement for HSI2 during abiotic stress, hsi2 single mutants and plants overexpressing HSI2 were subjected to simulated drought stress by withholding watering, and characterized through physiological, metabolic and gene expression studies.

Results

The hsi2 mutants demonstrated reduced wilting and maintained higher relative water content than wild-type after withholding

SUBMITTER: Sharma N 

PROVIDER: S-EPMC3893512 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature