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Research article - Peer-reviewed, 2015

Genome Wide Binding Site Analysis Reveals Transcriptional Coactivation of Cytokinin-Responsive Genes by DELLA Proteins

Marín-de la Rosa, Nora; Bhalerao, Rupali R.; Miskolczi, Pal Csaba; Alabadí, David

Abstract

The ability of plants to provide a plastic response to environmental cues relies on the connectivity between signaling pathways. DELLA proteins act as hubs that relay environmental information to the multiple transcriptional circuits that control growth and development through physical interaction with transcription factors from different families. We have analyzed the presence of one DELLA protein at the Arabidopsis genome by chromatin immunoprecipitation coupled to large-scale sequencing and we find that it binds at the promoters of multiple genes. Enrichment analysis shows a strong preference for cis elements recognized by specific transcription factor families. In particular, we demonstrate that DELLA proteins are recruited by type-B ARABIDOPSIS RESPONSE REGULATORS (ARR) to the promoters of cytokinin-regulated genes, where they act as transcriptional co-activators. The biological relevance of this mechanism is underpinned by the necessity of simultaneous presence of DELLAs and ARRs to restrict root meristem growth and to promote photomorphogenesis.

Published in

PLoS Genetics
2015, volume: 11, number: 7, article number: e1005337
Publisher: PUBLIC LIBRARY SCIENCE

Authors' information

Marín-de la Rosa, Nora
Institute for Plant Molecular and Cell Biology
Bhalerao, Rupali R.
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Alabadí, David
Institute for Plant Molecular and Cell Biology

UKÄ Subject classification

Genetics

Publication Identifiers

DOI: https://doi.org/10.1371/journal.pgen.1005337

URI (permanent link to this page)

https://res.slu.se/id/publ/77147