Ancestral function but divergent epigenetic regulation of HAIKU2 reveals routes of seed developmental evolution

doi:10.1016/j.molp.2022.09.002

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	Ancestral function but divergent epigenetic regulation of HAIKU2 reveals routes of seed developmental evolution
	Wu, Di ; Wei, Yiming ; Zhao, Xiangyu ; Li, Boka 2,3; Zhang, Huankai ; Xu, Gang ; Lv, Juntong ; Zhang, Dajian ; Zhang, Xiansheng ; Ni, Min 4
刊名	MOLECULAR PLANT
	2022
卷号	15 期号:10 页码:1575-1589
关键词	Brassicales endosperm Fabales IKU2 MEDEA Poales
ISSN号	1674-2052
DOI	10.1016/j.molp.2022.09.002
文献子类	Article
英文摘要	Evolution is driven by various mechanisms. A directional increase in the embryo to endosperm ratio is an evolutionary trend within the angiosperms. The endosperm constitutes a major portion of the seed volume in Poales and some dicots. However, in other dicots such as Arabidopsis and soybean, the endosperm pro-liferates early, followed by embryo growth to replace the endosperm. The Arabidopsis leucine-rich repeat receptor protein kinase AtHAIKU2 (AtIKU2) is a key regulator of early endosperm proliferation. In this study, we found that IKU2s from Brachypodium, rice, and soybean can complement the abnormal seed develop-mental phenotype of Atiku2, while AtIKU2 also rescues the defective endosperm proliferation in the Bra-chypodium BdIKU2 knockout mutant seeds. AtIKU2 and soybean GmIKU2 are actively expressed a few days after fertilization. Thereafter, expression of AtIKU2 is suppressed by the FIS-PRC2 complex-mediated H3K27me3. The soybean GmIKU2 locus is also enriched with H3K27me3 marks. The histone methyltrans-ferase AtMEA is unique to Brassicaceae, but one GmSWN in soybean plays a similar role in seed develop-ment as AtMEA. By contrast, the BdIKU2 and rice OsIKU2 loci are continuously expressed and are devoid of H3K27me3 marks. Taken together, these results suggest that IKU2 genes retain an ancestral function, but the duration of their expression that is controlled by PRC2-mediated epigenetic silencing contributes to silenced or persistent endosperm proliferation in different species. Our study reveals an epigenetic mech-anism that drives the development of vastly different seed ontogenies.
学科主题	Biochemistry & Molecular Biology ; Plant Sciences
电子版国际标准刊号	1752-9867
出版地	CAMBRIDGE
WOS关键词	POLYCOMB-GROUP GENE ; FLOWERING-LOCUS-T ; ENDOSPERM DEVELOPMENT ; EXPRESSION ; SIZE ; PROTEIN ; MEDEA ; SELECTION ; SEQUENCE ; COMPLEX
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	CELL PRESS
WOS记录号	WOS:000882769800012
资助机构	National Natural Science Foundation of China [32071921, 31730008] ; National Key Research and Development Program [2021YFF1001203] ; National Science Foundation [IOS-1933291]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28512]
专题	系统与进化植物学国家重点实验室
作者单位	1.Univ Minnesota Twin Cities, Dept Plant & Microbial Biol, St Paul, MN 55108 USA 2.Shandong Agr Univ, Coll Life Sci, Natl Key Lab Crop Biol, Tai An 271018, Peoples R China 3.Chinese Acad Sci, Inst Bot, CAS Ctr Excellence Mol Plant Sci, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Di,Wei, Yiming,Zhao, Xiangyu,et al. Ancestral function but divergent epigenetic regulation of HAIKU2 reveals routes of seed developmental evolution[J]. MOLECULAR PLANT,2022,15(10):1575-1589.
APA	Wu, Di.,Wei, Yiming.,Zhao, Xiangyu.,Li, Boka.,Zhang, Huankai.,...&Ni, Min.(2022).Ancestral function but divergent epigenetic regulation of HAIKU2 reveals routes of seed developmental evolution.MOLECULAR PLANT,15(10),1575-1589.
MLA	Wu, Di,et al."Ancestral function but divergent epigenetic regulation of HAIKU2 reveals routes of seed developmental evolution".MOLECULAR PLANT 15.10(2022):1575-1589.