DELLA-induced early transcriptional changes during etiolated development in Arabidopsis thaliana.

ABSTRACT: The hormones gibberellins (GAs) control a wide variety of processes in plants, including stress and developmental responses. This task largely relies on the activity of the DELLA proteins, nuclear-localized transcriptional regulators that do not seem to have DNA binding capacity. The identification of early target genes of DELLA action is key not only to understand how GAs regulate physiological responses, but also to get clues about the molecular mechanisms by which DELLAs regulate gene expression. Here, we have investigated the global, early transcriptional response triggered by the Arabidopsis DELLA protein GAI during skotomorphogenesis, a developmental program tightly regulated by GAs. Our results show that the induction of GAI activity has an almost immediate effect on gene expression

SUBMITTER: Gallego-Bartolome J 

PROVIDER: S-EPMC3164146 | biostudies-literature | 2011

REPOSITORIES: biostudies-literature