Drought-induced site-specific DNA methylation and its association with drought tolerance in rice (Oryza sativa L.).

ABSTRACT: An indica pyramiding line, DK151, and its recurrent parent, IR64, were evaluated under drought stress and non-stress conditions for three consecutive seasons. DK151 showed significantly improved tolerance to drought. The DNA methylation changes in DK151 and IR64 under drought stress and subsequent recovery were assessed using methylation-sensitive amplified polymorphism analysis. Our results indicate that drought-induced genome-wide DNA methylation changes accounted for ∼12.1% of the total site-specific methylation differences in the rice genome. This drought-induced DNA methylation pattern showed three interesting properties. The most important one was its genotypic specificity reflected by large differences in the detected DNA methylation/demethylation sites between DK151 and IR64, which

SUBMITTER: Wang WS 

PROVIDER: S-EPMC3060682 | biostudies-literature | 2011 Mar

REPOSITORIES: biostudies-literature