Mesozoic cupules and the origin of the angiosperm second integument

doi:10.1038/s41586-021-03598-w

	Mesozoic cupules and the origin of the angiosperm second integument
	Shi, Gongle 2,3; Herrera, Fabiany 4; Herendeen, Patrick S.4; Clark, Elizabeth G.5; Crane, Peter R.1,6
刊名	NATURE
	2021-05-26
页码	20
ISSN号	0028-0836
DOI	10.1038/s41586-021-03598-w
通讯作者	Shi, Gongle(glshi@nigpas.ac.cn)
英文摘要	The second integument of the angiosperm ovule is unique among seed plants, with developmental genetics that are distinct from those of the inner integument(1). Understanding how the second integument should be compared to structures in other seed plants is therefore crucial to resolving the long-standing question of the origin of angiosperms(2-6). Attention has focused on several extinct plants with recurved cupules that are reminiscent of the anatropous organization of the basic bitegmic ovules of angiosperms(1-6), but interpretations have been hampered by inadequate information on the relevant fossils. Here we describe abundant exceptionally well-preserved recurved cupules from a newly discovered silicified peat dating to the Early Cretaceous epoch (around 125.6 million years ago) in Inner Mongolia, China. The new material, combined with re-examination of potentially related fossils, indicates that the recurved cupules of several groups of Mesozoic plants are all fundamentally comparable, and that their structure is consistent with the recurved form and development of the second integument in the bitegmic anatropous ovules of angiosperms. Recognition of these angiosperm relatives (angiophytes) provides a partial answer to the question of angiosperm origins, will help to focus future work on seed plant phylogenetics and has important implications for ideas on the origin of the angiosperm carpel.
资助项目	Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017359] ; US National Science Foundation[DEB-1748286] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41790454] ; Oak Spring Garden Foundation
WOS关键词	SEED PLANTS ; CORYSTOSPERMALES ; PTERIDOSPERMS ; EVOLUTION ; OVULES
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE RESEARCH
WOS记录号	WOS:000654970600002
资助机构	Youth Innovation Promotion Association of the Chinese Academy of Sciences ; US National Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Oak Spring Garden Foundation
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/38141]
专题	中国科学院南京地质古生物研究所
通讯作者	Shi, Gongle
作者单位	1.Yale Univ, Yale Sch Environm, New Haven, CT USA 2.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China 4.Chicago Bot Garden, Glencoe, IL USA 5.Duke Univ, Dept Biol, Durham, NC USA 6.Oak Spring Garden Fdn, Upperville, VA USA
推荐引用方式 GB/T 7714	Shi, Gongle,Herrera, Fabiany,Herendeen, Patrick S.,et al. Mesozoic cupules and the origin of the angiosperm second integument[J]. NATURE,2021:20.
APA	Shi, Gongle,Herrera, Fabiany,Herendeen, Patrick S.,Clark, Elizabeth G.,&Crane, Peter R..(2021).Mesozoic cupules and the origin of the angiosperm second integument.NATURE,20.
MLA	Shi, Gongle,et al."Mesozoic cupules and the origin of the angiosperm second integument".NATURE (2021):20.