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题名: Proteasome-Mediated Degradation of FRIGIDA Modulates Flowering Time in Arabidopsis during Vernalization
作者: Hu, Xiangyang1, 2, 3; Kong, Xiangxiang1, 2, 3; Wang, Chuntao1, 2, 3; Ma, Lan1, 2, 4; Zhao, Jinjie1, 2, 4; Wei, Jingjing1, 2, 4; Zhang, Xiaoming1, 2, 4; Loake, Gary J.5; Zhang, Ticao1; Huang, Jinling1, 6; Yang Yongping(杨永平)1, 2, 3
刊名: PLANT CELL
出版日期: 2014-12-01
卷号: 26, 期号:12, 页码:4763-4781
DOI: 10.1105/tpc.114.132738
文章类型: Article
英文摘要: Winter-annual accessions of Arabidopsis thaliana require either exposure to cold stress or vernalization to initiate flowering via FRIGIDA (FRI). FRI acts as a scaffold protein to recruit several chromatin modifiers that epigenetically modify flowering genes. Here, we report that proteasome-mediated FRI degradation regulates flowering during vernalization in Arabidopsis. Our genetic and biochemical experiments demonstrate that FRI directly interacts with the BTB (Bric-a-Brac/Tramtrack/Broad Complex) proteins LIGHT-RESPONSE BTB1 (LRB1) and LRB2 as well as the CULLIN3A (CUL3A) ubiquitin-E3 ligase in vitro and in vivo, leading to proteasomal degradation of FRI during vernalization. The degradation of FRI is accompanied by an increase in the levels of the long noncoding RNA ColdAIR, which reduces the level of histone H3Lys4 trimethylation (H3K4me3) in FLOWERING LOCUS C chromatin to promote flowering. Furthermore, we found that the cold-induced WRKY34 transcription factor binds to the W-box in the promoter region of CUL3A to modulate CUL3A expression. Deficiency of WRKY34 suppressed CUL3A transcription to enhance FRI protein stability and led to late flowering after vernalization. Conversely, overexpression of WRK34 promoted FRI degradation and early flowering through inducing CUL3A accumulation. Together, these data suggest that WRKY34-induced and CUL3A-dependent proteolysis of FRI modulate flowering in response to vernalization.
类目[WOS]: Biochemistry & Molecular Biology ; Plant Sciences ; Cell Biology
研究领域[WOS]: Biochemistry & Molecular Biology ; Plant Sciences ; Cell Biology
关键词[WOS]: WINTER-ANNUAL HABIT ; CHROMATIN MODIFICATION ; HISTONE METHYLATION ; NATURAL VARIATION ; NONCODING RNA ; CAJAL BODIES ; TRANSCRIPTION ; THALIANA ; PROTEINS ; LIGASE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000348646000018
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/20466
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Univ Edinburgh, Sch Biol Sci, Edinburgh EH9 3JR, Midlothian, Scotland
6.E Carolina Univ, Dept Biol, Greenville, NC 27858 USA
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