Journal
PLANT JOURNAL
Volume 83, Issue 3, Pages 537-545Publisher
WILEY-BLACKWELL
DOI: 10.1111/tpj.12908
Keywords
HAG1; histone acetylation; phase transition; flowering; SPLs; Arabidopsis thaliana
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Funding
- National Research Foundation [NRF-2013R1A2A1A01010750]
- Next-Generation BioGreen21 Program of the Rural Development Administration [PJ01101701]
- BK21 Plus Program of the NRF
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During growth and development, plants undergo a series of phase transitions from the juvenile-to-adult vegetative phase to the reproductive phase. In Arabidopsis, vegetative phase transitions and flowering are regulated by SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) factors. SPL mRNAs are post-transcriptionally regulated by miR156 in an age-dependent manner; however, the role of other mechanisms in this process is not known. In this study, we demonstrate that the HAG1/GCN5- and PRZ1/ADA2b-containing SAGA-like histone acetyltransferase (HAT) complex directly controls the transcription of SPLs and determines the time for juvenile-to-adult phase transition. Thus, epigenetic control by the SAGA-like HAT complex determines the transcriptional output of SPLs, which might be a prerequisite for the subsequent post-transcriptional regulation by miR156. Importantly, this epigenetic control mechanism is also crucial for miR156-independent induction of SPLs and acceleration of phase transition by light and photoperiod or during post-embryonic growth.
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