Plant Development: How Long Is a Root?

Anthony Bishopp, Robertas Ursache & Ykä Helariutta

Summary

The plant hormone cytokinin controls root growth by balancing the division and differentiation of stem cells. But what controls accumulation of cytokinin? A new study has identified a regulatory loop between a transcription factor, PHABULOSA, and cytokinin biosynthesis that creates robust domains of cytokinin activity.

Current Biology 22 (21), R919-R921