Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution
Experimental evidence for eukaryotic fossil preservation: Onion skin cells in silica solution
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真核化石保存的实验证据：二氧化硅溶液中的洋葱皮细胞
DOI：
10.1016/j.precamres.2009.01.006
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发表时间：
2009-05
影响因子：
3.8
通讯作者：
Liu, Xinchun
中科院分区：
文献类型：
--
作者：
Chen, Xiaozheng;Wang, Wei;Lou, Yue;Wang, Yue;Cao, Changqun;Shang, Qinghua;Liu, Xinchun
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.
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DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
Chen Xiao-zheng
通讯作者：
Chen Xiao-zheng
影响因子：
2.9
作者：
M. Rivera
通讯作者：
M. Rivera
影响因子：
1.4
作者：
H. Hofmann;G. D. Jackson
通讯作者：
H. Hofmann;G. D. Jackson
影响因子：
1.4
作者：
S. Schultze-Lam;F. Ferris;K. Konhauser;R. G. Wiese
通讯作者：
S. Schultze-Lam;F. Ferris;K. Konhauser;R. G. Wiese
影响因子：
2.8
作者：
Akahane, H;Furuno, T;Yamamoto, S
通讯作者：
Yamamoto, S