Abstract:
:Light and microRNAs (miRNAs) are key external and internal signals for plant development, respectively. However, the relationship between the light signaling and miRNA biogenesis pathways remains unknown. Here we found that miRNA processer proteins DCL1 and HYL1 interact with a basic helix-loop-helix (bHLH) transcription factor, phytochrome-interacting factor 4 (PIF4), which mediates the destabilization of DCL1 during dark-to-red-light transition. PIF4 acts as a transcription factor for some miRNA genes and is necessary for the proper accumulation of miRNAs. DCL1, HYL1, and mature miRNAs play roles in the regulation of plant hypocotyl growth. These results uncovered a previously unknown crosstalk between miRNA biogenesis and red light signaling through the PIF4-dependent regulation of miRNA transcription and processing to affect red-light-directed plant photomorphogenesis.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
Sun Z,Li M,Zhou Y,Guo T,Liu Y,Zhang H,Fang Ydoi
10.1371/journal.pgen.1007247subject
Has Abstractpub_date
2018-03-09 00:00:00pages
e1007247issue
3eissn
1553-7390issn
1553-7404pii
PGENETICS-D-17-02116journal_volume
14pub_type
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