Natural variation identifies genes affecting drought-induced abscisic acid accumulation in Arabidopsis thaliana.

ABSTRACT: Accumulation of the stress hormone abscisic acid (ABA) in response to drought and low water-potential controls many downstream acclimation mechanisms. However, mechanisms controlling ABA accumulation itself are less known. There was a 10-fold range of variation in ABA levels among nearly 300 Arabidopsis thaliana accessions exposed to the same low water-potential severity. Genome-wide association analysis (GWAS) identified genomic regions containing clusters of ABA-associated SNPs. Candidate genes within these regions included few genes with known stress or ABA-related function. The GWAS data were used to guide reverse genetic analysis, which found effectors of ABA accumulation. These included plasma-membrane-localized signaling proteins such as receptor-like kinases, aspartic protea

SUBMITTER: Kalladan R 

PROVIDER: S-EPMC5664505 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature