Differential spatial distribution of miR165/6 determines variability in plant root anatomy
A clear example of interspecific variation is the number of root cortical layers in plants. The genetic
mechanisms underlying this variability are poorly understood, partly due to the lack of a convenient
model. Here, we demonstrate that Cardamine hirsuta, unlike Arabidopsis thaliana, has two cortical
layers that are patterned during late embryogenesis. We show that a miR165/6-dependent
distribution of the HOMEODOMAIN LEUCINE ZIPPER III (HD-ZIPIII) transcription factor