NIGPAS OpenIR  > 中国科学院南京地质古生物研究所
Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution
Chen, Xiaozheng (陈孝政)1; Wang, Wei (王伟)1; Shang, Qinghua (尚庆华)2; Lou, Yue3; Liu, Xinchun (刘欣春)1; Cao, Changqun (曹长群)1; Wang, Yue (王玥)1
2009-05-01
Source PublicationPRECAMBRIAN RESEARCH
ISSN0301-9268
Volume170Issue:3-4Pages:223-230
Abstract

Research on the origin of eukaryotes often focuses on the exceptional preservation found in silicified Precambrian fossils. Nuclei like subcellular structures in well-preserved fossil becomes confusion and arguments, which focus on whether the partial degradation of prokaryotes produces artifacts that resemble a 'nucleus', or fossilized nuclei of eukaryotes. In order to understand the mechanisms of silicification and identify the fossilized subcellular and microstructures in rocks, a series of laboratory controlled experiments were performed for simulating the silicification process. The effects of different silica solutions in eukaryote fossilization were studied in our experiments by exposing onion skin cells (epidermis) to silica solutions. Onion skin provides a good experimental model because of its well characterized cellular structures which are easily observed. The designed experiments revealed that the possibility of onion cell preserved as a "fossil" with nuclear structures, the first week fossilization, or mineralization as rapid as 1 week is important. And the experiment also revealed interactions between silica and the onion skin cell wall surface functional groups were weak. The preservation of nuclei in the onion skin model was due to precipitation in highly supersaturated silica solutions rather than simply the high silica concentration. When the silica gel precipitates slowly at low supersaturation states, the nuclei were not well preserved, but the rapid precipitation at high supersaturated silica conditions preserved nuclear structures. A better understanding of the processes involved in onion skin fossilization will further contribute to issues concerning the silicification of other eukaryotic materials. (C) 2009 Elsevier B.V. All rights reserved.

KeywordEukaryotic Cell Silicification Simulated Experiment Nuclei
DOI10.1016/j.precamres.2009.01.006
Language英语
WOS KeywordExperimental Silicification ; Hot-springs ; Microbial Silicification ; Belcher Islands ; South-africa ; New-zealand ; Microfossils ; Microorganisms ; Organisms ; Bacteria
Funding ProjectNational Science Foundation of China[2006CB806400] ; National Science Foundation of China[40773051] ; National Science Foundation of China[J0630967]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000265820400005
Funding OrganizationNational Science Foundation of China
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/274
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorWang, Wei (王伟)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China
3.Shaanxi Normal Univ, Coll Life Sci, Xian, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Chen, Xiaozheng ,Wang, Wei ,Shang, Qinghua ,et al. Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution[J]. PRECAMBRIAN RESEARCH,2009,170(3-4):223-230.
APA Chen, Xiaozheng .,Wang, Wei .,Shang, Qinghua .,Lou, Yue.,Liu, Xinchun .,...&Wang, Yue .(2009).Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution.PRECAMBRIAN RESEARCH,170(3-4),223-230.
MLA Chen, Xiaozheng ,et al."Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution".PRECAMBRIAN RESEARCH 170.3-4(2009):223-230.
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