Allantoate amidohydrolase transcript expression is independent of drought tolerance in soybean.

ABSTRACT: Drought is a limiting factor for N(2) fixation in soybean [Glycine max (L.) Merr.] thereby resulting in reduced biomass accumulation and yield. Drought-sensitive genotypes accumulate ureides, a product of N(2) fixation, during drought stress; however, drought-tolerant genotypes have lower shoot ureide concentrations, which appear to alleviate drought stress on N(2) fixation. A key enzyme involved in ureide breakdown in shoots is allantoate amidohydrolase (AAH). It is hypothesized that AAH gene expression in soybean determines shoot ureide concentrations during water-deficit stress and is responsible for the differential sensitivities of the N(2)-fixation response to drought among soybean genotypes. The objectives were to examine the relationship between AAH transcript levels and shoot urei

SUBMITTER: Charlson DV 

PROVIDER: S-EPMC2652049 | biostudies-literature | 2009

REPOSITORIES: biostudies-literature