The transcription factor SPEECHLESS (SPCH) is necessary for establishing the stomatal lineage in plants, but the signalling pathways that control this process are not fully understood. Russinova and colleagues report that brassinosteroid signalling regulates stomatal development by inhibiting BIN2-mediated phosphorylation of SPCH.
- Gustavo E. Gudesblat
- Joanna Schneider-Pizoń
- Eugenia Russinova