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
发表期刊PRECAMBRIAN RESEARCH
ISSN0301-9268
卷号170期号:3-4页码:223-230
摘要

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.

关键词Eukaryotic Cell Silicification Simulated Experiment Nuclei
DOI10.1016/j.precamres.2009.01.006
语种英语
关键词[WOS]Experimental Silicification ; Hot-springs ; Microbial Silicification ; Belcher Islands ; South-africa ; New-zealand ; Microfossils ; Microorganisms ; Organisms ; Bacteria
资助项目National Science Foundation of China[2006CB806400] ; National Science Foundation of China[40773051] ; National Science Foundation of China[J0630967]
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000265820400005
项目资助者National Science Foundation of China
出版者ELSEVIER SCIENCE BV
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/274
专题中国科学院南京地质古生物研究所
其他
通讯作者Wang, Wei (王伟)
作者单位1.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
第一作者单位中国科学院南京地质古生物研究所
通讯作者单位中国科学院南京地质古生物研究所
推荐引用方式
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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