The system that controls gene expression by the plant signaling molecule auxin has deep evolutionary roots, and stepwise increases in system complexity shaped the highly diverse auxin response in land plants.

SWI/SNF chromatin remodeling complexes act as ‘gatekeepers’ for auxin responses and directly interact with the auxin response factor MONOPTEROS.

The auxin-sensitive Aux/IAA transcriptional repressors regulate approximately 35% of the annotated genes in Physcomitrella patens and exhibit complex interactions with both the activating and repressing ARF transcription factors.

Signals from major hormones and the environment are integrated in the Arabidopsis hypocotyl to control gene expression and plant stem elongation.

The hormonal circuitry controlling development in plants can be studied and re-programmed with hormone activated Cas9-based repressors.

Genetic analyses reveal that the TIR1/AFB auxin receptors have broadly overlapping functions throughout plant development, but that the AFB1 receptor has a specialized role in a rapid auxin response.

Rhythmic centrifugal waves of auxin traveling through the tissue provides high definition positional information to cells that is not only spatial but also temporal.

HEC transcription factors control the timing of cell fate transitions in a dynamic stem cell system, allowing plants to adapt their developmental program to diverse environments.

The nuclear pathway for auxin perception is responsible for the rapid auxin-induced cell wall acidification and growth of aerial organs of plants.

Negative Gravitropic Response of roots (NGRs), pivotal for root gravitropic bending, are indispensable for the gravity-induced translocation of D6 protein kinase, a key regulator of PIN3 auxin efflux carrier activity.