Arabidopsis FHY3 and FAR1 integrate light and strigolactone signaling to regulate branching

In plants, branching is regulated by both hormones and external cues such as light. Here the authors show that in Arabidopsis, the phytochrome A-signaling components FHY3 and FAR1, and SMXL proteins that repress strigolactone signaling, both interact with SPL proteins to control expression of the branching regulator BRC1.