The B3-Domain Transcription Factor VAL1 Regulates the Floral Transition by Repressing FLOWERING LOCUS T

doi:10.1104/pp.19.00642

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	The B3-Domain Transcription Factor VAL1 Regulates the Floral Transition by Repressing FLOWERING LOCUS T
	Jing, Yanjun ; Guo, Qiang 1; Lin, Rongcheng 1,3
刊名	PLANT PHYSIOLOGY
	2019
卷号	181 期号:1 页码:236-248
ISSN号	0032-0889
DOI	10.1104/pp.19.00642
文献子类	Article
英文摘要	Many plants monitor changes in day length (or photoperiod) and adjust the timing of the floral transition accordingly to ensure reproductive success. In long-day plants, a long-day photoperiod triggers the production of florigen, which promotes the floral transition. FLOWERING LOCUS T (FT) in Arabidopsis (Arabidopsis thaliana) encodes a major component of florigen, and FT expression is activated in leaf veins specifically at dusk through the photoperiod pathway. Repression of FT mediated by Polycomb group (PcG) proteins prevents precocious flowering and adds another layer to FT regulation. Here, we identified high-level trimethylation of histone H3 at Lys 27 (H3K27me3) in the high trimethylation region (HTR) of the FT locus from the second intron to the 3' untranslated region. The HTR contains a cis-regulatory DNA element required for H3K27me3 enrichment that is recognized by the transcriptional repressor VIVIPAROUS1/ABSCISIC ACID INSENSITIVE3-LIKE1 (VAL1). VAL1 directly represses FT expression before dusk and at night, coinciding with the high abundance of both VAL1 mRNA and VAL1 homodimer. Furthermore, VAL1 recruits LIKE HETEROCHROMATIN PROTEIN1 and MULTICOPY SUPRESSOR OF IRA1 to FT chromatin, leading to an H3K27me3 peak at the HTR of FT. These findings reveal a mechanism for PcG repression of FT mediated by an intronic cis-silencing element and suggest a possible role for VAL1 in modulating PcG repression of FT during the flowering response.
学科主题	Plant Sciences
电子版国际标准刊号	1532-2548
出版地	CARY
WOS关键词	SEED MATURATION ; HISTONE H3 ; ARABIDOPSIS MSI1 ; POLYCOMB ; GENES ; VERNALIZATION ; COMPLEX ; CIS ; FLC ; TRIMETHYLATION
WOS研究方向	Plant Sciences
语种	英语
出版者	OXFORD UNIV PRESS INC
WOS记录号	WOS:000483941300022
资助机构	National Key Research and Development Program of China [2017YFA0503800] ; Ministry of Agriculture of ChinaMinistry of Agriculture, China [2016ZX08009-003] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [31870288, 31570310] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences (Youth Innovation Promotion Association CAS) [2015064]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/19671]
专题	中科院光生物学重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, Key Lab Photobiol, Beijing 100093, Peoples R China 2.Chinese Acad Sci, CAS Ctr Excellence Mol Plant Sci, Beijing 100093, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jing, Yanjun,Guo, Qiang,Lin, Rongcheng. The B3-Domain Transcription Factor VAL1 Regulates the Floral Transition by Repressing FLOWERING LOCUS T[J]. PLANT PHYSIOLOGY,2019,181(1):236-248.
APA	Jing, Yanjun,Guo, Qiang,&Lin, Rongcheng.(2019).The B3-Domain Transcription Factor VAL1 Regulates the Floral Transition by Repressing FLOWERING LOCUS T.PLANT PHYSIOLOGY,181(1),236-248.
MLA	Jing, Yanjun,et al."The B3-Domain Transcription Factor VAL1 Regulates the Floral Transition by Repressing FLOWERING LOCUS T".PLANT PHYSIOLOGY 181.1(2019):236-248.