Marine photosynthetic organisms sense light underwater, yet the role of phytochromes has remained poorly understood. This study shows that phytochromes in a Phaeodactylum diatom drive a coordinated, light-dependent collective motion under blue or far-red light, suggesting a new mode of microbial communication.
- Joan S. Font-Muñoz
- Marianne Jaubert
- Angela Falciatore