In land plants, the Ia and IIIb basic helix–loop–helix (Ia-IIIb bHLH) module regulates stomatal development. This study shows that a Ia-IIIb bHLH heterodimer, MpSETA-MpICE2, regulates seta formation in Marchantia and suggests a common mechanism underlying stomata and setae formation.
- Kenta C. Moriya
- Makoto Shirakawa
- Tomoo Shimada
