A transcription factor WRKY36 interacts with AFP2 to break primary seed dormancy by progressively silencing DOG1 in Arabidopsis
文献类型： 外文期刊
作者： Deng, Guoli 1 ; Sun, Haiqing 1 ; Hu, Yulan 1 ; Yang, Yaru 1 ; Li, Ping 1 ; Chen, Yilin 1 ; Zhu, Ying 2 ; Zhou, Yun 3 ; Huang, Jinling 3 ; Neill, Steven J. 5 ; Hu, Xiangyang 1 ;
作者机构： 1.Shanghai Univ, Sch Life Sci, Shanghai Key Lab Bioenergy Crops, Shanghai 200444, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310004, Zhejiang, Peoples R China
3.Henan Univ, Sch Life Sci, Key Lab Plant Stress Biol, Kaifeng 475001, Peoples R China
4.East Carolina Univ, Dept Biol, Greenville, NC 27858 USA
5.Univ West England, Fac Hlth & Appl Sci, Bristol BS16 1QY, Avon, England
关键词： AFP2; Arabidopsis; DOG1; primary seed dormancy; WRKY36
期刊名称：NEW PHYTOLOGIST （ 影响因子：9.4； 五年影响因子：10.5 ）
ISSN： 0028-646X
年卷期： 2023 年
页码：
收录情况： SCI
摘要： The phytohormones abscisic acid (ABA) and gibberellic acid (GA) antagonistically control the shift between seed dormancy and its alleviation. DELAY OF GERMINATION1 (DOG1) is a critical regulator that determines the intensity of primary seed dormancy, but its underlying regulatory mechanism is unclear.In this study, we combined physiological, biochemical, and genetic approaches to reveal that a bHLH transcriptional factor WRKY36 progressively silenced DOG1 expression to break seed dormancy through ABI5-BINDING PROTEIN 2 (AFP2) as the negative regulator of ABA signal.AFP2 interacted with WRKY36, which recognizes the W-BOX in the DOG1 promoter to suppress its expression; Overexpressing WRKY36 broke primary seed dormancy, whereas wrky36 mutants showed strong primary seed dormancy. In addition, AFP2 recruited the transcriptional corepressor TOPLESS-RELATED PROTEIN2 (TPR2) to reduce histone acetylation at the DOG1 locus, ultimately mediating WRKY36-dependent inhibition of DOG1 expression to break primary seed dormancy.Our result proposes that the WRKY36-AFP2-TPR2 module progressively silences DOG1 expression epigenetically, thereby fine-tuning primary seed dormancy.
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