Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution
文献类型：期刊论文
| 作者 | Chen, Xiaozheng1; Wang, Wei1; Shang, Qinghua2; Lou, Yue3; Liu, Xinchun1; Cao, Changqun1; Wang, Yue1 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2009-05-01 |
| 卷号 | 170期号:3-4页码:223-230 |
| 关键词 | Eukaryotic Cell Silicification Simulated Experiment Nuclei |
| 文献子类 | Article |
| 英文摘要 | 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. |
| WOS关键词 | EXPERIMENTAL SILICIFICATION ; HOT-SPRINGS ; MICROBIAL SILICIFICATION ; BELCHER ISLANDS ; SOUTH-AFRICA ; NEW-ZEALAND ; MICROFOSSILS ; MICROORGANISMS ; ORGANISMS ; BACTERIA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000265820400005 |
| 源URL | [http://124.16.247.212/handle/311034/7619]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 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. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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