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Epigenetic control of juvenile‐to‐adult phase transition by the Arabidopsis SAGA‐like complex
Author(s) -
Kim JiYun,
Oh Jee Eun,
Noh YooSun,
Noh Bosl
Publication year - 2015
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/tpj.12908
Subject(s) - arabidopsis , epigenetics , biology , histone , photoperiodism , juvenile , genetics , microbiology and biotechnology , transcription factor , gene , botany , mutant
Summary 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.