Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution

IVPP-IR > 中科院古脊椎所（2000年以后）

	Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution
	Chen, Xiaozheng 1; Wang, Wei 1; Shang, Qinghua 2; Lou, Yue 3; Liu, Xinchun 1; Cao, Changqun 1; Wang, Yue 1
	2009-05-01
发表期刊	PRECAMBRIAN RESEARCH
卷号	170 期号:3-4 页码:223-230
文章类型	Article
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
WOS标题词	Science & Technology ; Physical Sciences
关键词[WOS]	EXPERIMENTAL SILICIFICATION ; HOT-SPRINGS ; MICROBIAL SILICIFICATION ; BELCHER ISLANDS ; SOUTH-AFRICA ; NEW-ZEALAND ; MICROFOSSILS ; MICROORGANISMS ; ORGANISMS ; BACTERIA
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000265820400005
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7619
专题	中科院古脊椎所（2000年以后）
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
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.