microRNA-mediated control of cell fate specification and patterning in Marchantia polymorpha.
It is reported that MpDCL1a is required for the biogenesis of miRNAs and a central role for miR166/Homeodomain Zipper Class III-regulated auxin synthesis in the specification of cell identity, patterning, meristem function, laminar expansion, and the development of the body in the last common ancestor of the bryophytes and vascular plants is uncovered.