Genome accessibility dynamics in response to phosphate limitation is controlled by the PHR1 family of transcription factors in Arabidopsis

Significance Low phosphate (Pi) availability is a major constraint for plant productivity in both natural and agricultural environments. Over the course of evolution, plants acquired a complex cascade of transcriptional responses that enhance their capacity to survive and reproduce in phosphate-poor soils. However, it is unclear to what extent chromatin architecture is modified to activate or repress gene expression in response to Pi starvation. Here, we report the effects of Pi starvation on chromatin accessibility and its association with gene expression. We determined that major remodeling in chromatin accessibility takes place in response to Pi starvation and that this response is activated by the PHR1 family of transcription factors.