Journal
DEVELOPMENTAL CELL
Volume 19, Issue 5, Pages 765-777Publisher
CELL PRESS
DOI: 10.1016/j.devcel.2010.10.010
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Funding
- NIH [R01GM066258]
- NSFC [30470169]
- Chinese Scholarship Council
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Brassinosteroids (BRs) regulate a wide range of developmental and physiological processes in plants through a receptor-kinase signaling pathway that controls the BZR transcription factors Here, we use transcript profiling and chromatin-immunoprecipitation microarray (ChIP-chip) experiments to identify 953 BR-regulated BZR1 target (BRBT) genes Functional studies of selected BRBTs further demonstrate roles in BR promotion of cell elongation The BRBT genes reveal numerous molecular links between the BR-signaling pathway and downstream components involved in developmental and physiological processes Furthermore, the results reveal extensive crosstalk between BR and other hormonal and light-signaling pathways at multiple levels For example, BZR1 not only controls the expression of many signaling components of other hormonal and light pathways but also coregulates common target genes with light-signaling transcription factors Our results provide a genomic map of steroid hormone actions in plants that reveals a regulatory network that integrates hormonal and light-signaling pathways for plant growth regulation
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