Journal
DEVELOPMENT
Volume 145, Issue 1, Pages -Publisher
COMPANY BIOLOGISTS LTD
DOI: 10.1242/dev.153858
Keywords
Cardamine hirsuta; Ground tissue; HD-ZIPIII; Root development; Arabidopsis; miR165/6
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Funding
- FIRB (Futuro in Ricerca) project grant from the Ministero dell'Istruzione, dell'Universita e della Ricerca [FIRB2013-RBFR13DCDS]
- European Research Council [260368]
- European Research Council (ERC) [260368] Funding Source: European Research Council (ERC)
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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 because of 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 PHABULOSA (PHB) controls this pattern. Our findings reveal that interspecies variation in miRNA distribution can determine differences in anatomy in plants.
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