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Mesozoic cupules and the origin of the angiosperm second integument
Shi, Gongle(史恭乐)1,2; Herrera, Fabiany3; Herendeen, Patrick S.3; Clark, Elizabeth G.4; Crane, Peter R.5,6
2021-05-26
Source PublicationNATURE
ISSN0028-0836
Pages20
Abstract

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.

DOI10.1038/s41586-021-03598-w
Indexed BySCI
Language英语
WOS KeywordSEED PLANTS ; CORYSTOSPERMALES ; PTERIDOSPERMS ; EVOLUTION ; OVULES
Funding ProjectYouth 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 Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000654970600002
Funding OrganizationYouth 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
PublisherNATURE RESEARCH
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/38142
Collection中国科学院南京地质古生物研究所
Corresponding AuthorShi, Gongle(史恭乐)
Affiliation1.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China
3.Chicago Bot Garden, Glencoe, IL USA
4.Duke Univ, Dept Biol, Durham, NC USA
5.Oak Spring Garden Fdn, Upperville, VA USA
6.Yale Univ, Yale Sch Environm, New Haven, CT USA
Recommended Citation
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.
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